CoCopedia - The Tandy/Radio Shack Color Computer Wiki - User contributions [en]

PAL Coco Differences

2024-09-11T01:33:51Z

MagicFab: /* Germany, Belgium and the Netherlands */

{{NavArticles}}
= A guide to the various PAL Coco systems =

Some other things just came to my mind (which is a little bit rusty after all
these years):

I own PAL CoCos (and MC-10s) from different areas and they are all slightly different.

== Germany, Belgium and the Netherlands ==

AFAIR, there's one group which has been sold in Germany, Belgium & the Netherlands (CoCo 1 to 2B). These are following the PAL-G standard and have a modulated RF video out on UHF (0.3-3.0 GHz) channel 36 (this channel was
originally kind of reserved for this purpose: computers, video recorders, etc.

In times when you only had 3 terrestrial analog TV programs and not yet SCART and/or composite video inputs in your TV sets), a channel switch was not present (the corresponding hole in the CoCo's case was covered by a plate reading "Channel 36").

Some key data for PAL-G:

* Vertical scan lines: 625
* Vertical frequency: 50 Hz
* Horizontal frequency: 15.625 kHz
* Video band-width: 5.0 MHz
* Audio carrier: 5.5 MHz
* Color subcarrier frequency: 4.43361875 MHz
* Channel spacing: 8 MHz
* Vision modulation type: AM
* Vision modulation polarity: negative
* Sound modulation: FM
* Vestigial side-band: 0.75 MHz
* Field period: 1/50 s = 20 ms

== United Kingdom ==

There's another type sold in United Kingdom (Great Britain [England, Scotland, Wales] and Northern Ireland), I assume this one follows PAL-I standard (difference to PAL G: Video band-width is 5.5 Mhz [instead of 5.0 MHz], Vestigial side-band is 1.25 MHz [instead of 0.75 MHz] and the audio carrier is at 6.0 MHz [instead of 5.5 Mhz]). The latter has the effect, that on a PAL G TV you can either have the sound correctly tuned or the image. It was rather using VHF (0.03-0.3 GHz) [instead of UHF], so it had the "Channel 3(?) or 4(?)" select switch.

== Australia ==

From Australia, I got at least some PAL CoCo3. The PAL CoCo3 had never been sold in Europe because Tandy / RadioShack closed its stores in the time the CoCo3 came out. The CoCo2B [lower-case, 6847-T1 VDG] was never officially available in Germany, but I got one with a very low serial number which was a demonstrator from our local store). Australia has PAL B/G, and AFAIR the machines have the VHF "channel 2(?) & 3(?)" switches, so I assume CoCo3s are PAL-B machines. However, you would rather use the composite video out or the RGB out with a CoCo 3 and not the RF modulator. Composite video out is generated from the RGB out with a piggy-backed satellite board, the GIME's NTSC composite out is not connected on PAL boards. The PAL CoCo3 has a modified PAL ROM too (initializing the GIME to 50Hz video timing).

== France ==

The strangest group of machines (CoCo1 to CoCo2B) come from France. These have a French AZERTY keyboard layout [instead of QWERTY in both the US and the rest of Europe, at least in Germany a QWERTZ layout would have been preferred, but none cared :-)]. The modulator has been completely replaced by a VDG to RGB circuit, which is compatible with the French SECAM-L TVs. For the sake of completeness, a SECAM-L RF modulator would have to comply with the following (I think they were sold as an external device):

* Vertical scan lines: 625
* Vertical frequency: 50 Hz
* Horizontal frequency: 15.625 kHz
* Video band-width: 6.0 MHz
* Audio carrier: 6.5 MHz
* Color subcarrier frequency: 4.406250 MHz/ 4.250 MHz
* Channel spacing: 8 MHz
* Vision modulation type: AM
* Vision modulation polarity: positive
* Sound modulation: AM
* Vestigial side-band: 1.25 MHz
* Field period: 1/50 s = 20 ms

The French CoCo PCBs have an additional +12V voltage generator on board, which is output along with R, G, B, H+V (which is AFAIR actually a composite sync signal) on a small Mini-DIN connector. Then you need a special Mini-DIN to Péritel (=Euro-SCART) cable, which contains voltage devider to create switch voltages which set the video sink (the TV) to RGB mode (rest-of-Europe SCART often runs on composite video mode only).

PAL Coco Differences

2024-09-11T01:32:04Z

MagicFab: /* A guide to the various PAL Coco systems */

{{NavArticles}}
= A guide to the various PAL Coco systems =

Some other things just came to my mind (which is a little bit rusty after all
these years):

I own PAL CoCos (and MC-10s) from different areas and they are all slightly different.

== Germany, Belgium and the Netherlands ==

AFAIR, there's one group which has been sold in Germany, Belgium & the Netherlands (CoCo 1 to 2B). These are following the PAL-G standard and have a modulated RF video out on UHF (0.3-3.0 GHz) channel 36 (this channel was
originally kind of reserved for this purpose: computers, video recorders, etc.

In times where you only had 3 terestrical analog TV programs and not yet SCART and/or composite video inputs in your TV sets). A channel switch was not present (the corresponding hole in the CoCo's case was covered by a plate reading "Channel 36").

Some key data for PAL-G:

* Vertical scan lines: 625
* Vertical frequency: 50 Hz
* Horizontal frequency: 15.625 kHz
* Video band-width: 5.0 MHz
* Audio carrier: 5.5 MHz
* Color subcarrier frequency: 4.43361875 MHz
* Channel spacing: 8 MHz
* Vision modulation type: AM
* Vision modulation polarity: negative
* Sound modulation: FM
* Vestigial side-band: 0.75 MHz
* Field period: 1/50 s = 20 ms

== United Kingdom ==

There's another type sold in United Kingdom (Great Britain [England, Scotland, Wales] and Northern Ireland), I assume this one follows PAL-I standard (difference to PAL G: Video band-width is 5.5 Mhz [instead of 5.0 MHz], Vestigial side-band is 1.25 MHz [instead of 0.75 MHz] and the audio carrier is at 6.0 MHz [instead of 5.5 Mhz]). The latter has the effect, that on a PAL G TV you can either have the sound correctly tuned or the image. It was rather using VHF (0.03-0.3 GHz) [instead of UHF], so it had the "Channel 3(?) or 4(?)" select switch.

== Australia ==

From Australia, I got at least some PAL CoCo3. The PAL CoCo3 had never been sold in Europe because Tandy / RadioShack closed its stores in the time the CoCo3 came out. The CoCo2B [lower-case, 6847-T1 VDG] was never officially available in Germany, but I got one with a very low serial number which was a demonstrator from our local store). Australia has PAL B/G, and AFAIR the machines have the VHF "channel 2(?) & 3(?)" switches, so I assume CoCo3s are PAL-B machines. However, you would rather use the composite video out or the RGB out with a CoCo 3 and not the RF modulator. Composite video out is generated from the RGB out with a piggy-backed satellite board, the GIME's NTSC composite out is not connected on PAL boards. The PAL CoCo3 has a modified PAL ROM too (initializing the GIME to 50Hz video timing).

== France ==

The strangest group of machines (CoCo1 to CoCo2B) come from France. These have a French AZERTY keyboard layout [instead of QWERTY in both the US and the rest of Europe, at least in Germany a QWERTZ layout would have been preferred, but none cared :-)]. The modulator has been completely replaced by a VDG to RGB circuit, which is compatible with the French SECAM-L TVs. For the sake of completeness, a SECAM-L RF modulator would have to comply with the following (I think they were sold as an external device):

* Vertical scan lines: 625
* Vertical frequency: 50 Hz
* Horizontal frequency: 15.625 kHz
* Video band-width: 6.0 MHz
* Audio carrier: 6.5 MHz
* Color subcarrier frequency: 4.406250 MHz/ 4.250 MHz
* Channel spacing: 8 MHz
* Vision modulation type: AM
* Vision modulation polarity: positive
* Sound modulation: AM
* Vestigial side-band: 1.25 MHz
* Field period: 1/50 s = 20 ms

The French CoCo PCBs have an additional +12V voltage generator on board, which is output along with R, G, B, H+V (which is AFAIR actually a composite sync signal) on a small Mini-DIN connector. Then you need a special Mini-DIN to Péritel (=Euro-SCART) cable, which contains voltage devider to create switch voltages which set the video sink (the TV) to RGB mode (rest-of-Europe SCART often runs on composite video mode only).

PAL Coco Differences

2024-09-11T01:30:56Z

MagicFab: /* A guide to the various PAL Coco systems */ Cleanup

{{NavArticles}}
== A guide to the various PAL Coco systems ==

Some other things just came to my mind (which is a little bit rusty after all
these years):

I own PAL CoCos (and MC-10s) from different areas and they are all slightly
different.

AFAIR, there's one group which has been sold in Germany, Belgium & the
Netherlands (CoCo 1 to 2B). These are following the PAL-G standard and have a
modulated RF video out on UHF (0.3-3.0 GHz) channel 36 (this channel was
originally kind of reserved for this purpose: computers, video recorders, etc.
In times where you only had 3 terestrical analog TV programs and not yet SCART
and/or composite video inputs in your TV sets). A channel switch was not
present (the corresponding hole in the CoCo's case was covered by a plate
reading "Channel 36").

Some key data for PAL-G:

* Vertical scan lines: 625
* Vertical frequency: 50 Hz
* Horizontal frequency: 15.625 kHz
* Video band-width: 5.0 MHz
* Audio carrier: 5.5 MHz
* Color subcarrier frequency: 4.43361875 MHz
* Channel spacing: 8 MHz
* Vision modulation type: AM
* Vision modulation polarity: negative
* Sound modulation: FM
* Vestigial side-band: 0.75 MHz
* Field period: 1/50 s = 20 ms

== United Kingdom ==

There's another type sold in United Kingdom (Great Britain [England, Scotland, Wales] and Northern Ireland), I assume this one follows PAL-I standard (difference to PAL G: Video band-width is 5.5 Mhz [instead of 5.0 MHz], Vestigial side-band is 1.25 MHz [instead of 0.75 MHz] and the audio carrier is at 6.0 MHz [instead of 5.5 Mhz]). The latter has the effect, that on a PAL G TV you can either have the sound correctly tuned or the image. It was rather using VHF (0.03-0.3 GHz) [instead of UHF], so it had the "Channel 3(?) or 4(?)" select switch.

== Australia ==

From Australia, I got at least some PAL CoCo3. The PAL CoCo3 had never been sold in Europe because Tandy / RadioShack closed its stores in the time the CoCo3 came out. The CoCo2B [lower-case, 6847-T1 VDG] was never officially available in Germany, but I got one with a very low serial number which was a demonstrator from our local store). Australia has PAL B/G, and AFAIR the machines have the VHF "channel 2(?) & 3(?)" switches, so I assume CoCo3s are PAL-B machines. However, you would rather use the composite video out or the RGB out with a CoCo 3 and not the RF modulator. Composite video out is generated from the RGB out with a piggy-backed satellite board, the GIME's NTSC composite out is not connected on PAL boards. The PAL CoCo3 has a modified PAL ROM too (initializing the GIME to 50Hz video timing).

== France ==

The strangest group of machines (CoCo1 to CoCo2B) come from France. These have a French AZERTY keyboard layout [instead of QWERTY in both the US and the rest of Europe, at least in Germany a QWERTZ layout would have been preferred, but none cared :-)]. The modulator has been completely replaced by a VDG to RGB circuit, which is compatible with the French SECAM-L TVs. For the sake of completeness, a SECAM-L RF modulator would have to comply with the following (I think they were sold as an external device):

* Vertical scan lines: 625
* Vertical frequency: 50 Hz
* Horizontal frequency: 15.625 kHz
* Video band-width: 6.0 MHz
* Audio carrier: 6.5 MHz
* Color subcarrier frequency: 4.406250 MHz/ 4.250 MHz
* Channel spacing: 8 MHz
* Vision modulation type: AM
* Vision modulation polarity: positive
* Sound modulation: AM
* Vestigial side-band: 1.25 MHz
* Field period: 1/50 s = 20 ms

The French CoCo PCBs have an additional +12V voltage generator on board, which is output along with R, G, B, H+V (which is AFAIR actually a composite sync signal) on a small Mini-DIN connector. Then you need a special Mini-DIN to Péritel (=Euro-SCART) cable, which contains voltage devider to create switch voltages which set the video sink (the TV) to RGB mode (rest-of-Europe SCART often runs on composite video mode only).

Hardware

2023-05-23T11:50:38Z

MagicFab: /* Memory Upgrades */ Added Disto, BoysonTech, edited Cloud9

{{NavHardware}}
==Hardware design and integrated circuits==
Internally the CoCo 1 and CoCo 2 models are functionally identical. The core of the system is virtually identical to the reference design included in the Motorola MC6883 data sheet and consists of five LSI chips:

*MC6809E [[Microprocessor Unit]] (MPU)
*MC6883/SN74LS783/SN74LS785 [[Synchronous Address Multiplexor]] (SAM)
*MC6847 [[Video Display Generator]] (VDG)
*Two [[Peripheral Interface Adapters]] (PIA), either MC6821 or MC6822 chips

==Audio Digitizers==
*[[Delta Pro]]
*[[Max Sound]] - GimeSoft's audio recorder that used the joystick port.

==Audio Output Devices==
*[[Orchestra-90 CC (26-3143)]] / [[CoCoDAC-16]] - Stereo Music Synthesizer DAC
*[[Speech/Sound Cartridge (26-3144A)]] - Music and Speech Synthesizer AY3-8913 Programmable Sound Generator and an SPO256-AL2 Speech Processor
*[[Game Master Cart]] - Flash ROM and SN76489AN Digital Complex Sound Generator
*[[CoCo PSG]] - YM-2149F OPL3 Programmable Sound Generator
*[[MEGA mini MPI]] - YM-262F OPL3 FM Synthesizer
*[[The Voice]] - Speech Systems' Speech Synthesizer SP01
*[[Super Voice]] - Speech Systems' Speech Synthesizer device that could sing.
*[[Real Talker]] - Voice Synthesizer by Colorware

==Bus Expander==
*[[Multi-Pak|Tandy Multipak (26-3024)]]
*[[Multi-Pak|Tandy Multipak (26-3124)]]
*[[Colorburst|Colorburst By Maxsys]]
*[[Howard Medical Slotpak]]
*[[Orion Technologies XPort]]
*[[CoNect Xpander]]
*[[CoNect Y Box]]
*[[Y-Cable]]
*[[Solderless Proto Board]]

==Computers & Clones==
*[[TRS-80 Color Computers]] (A list of all available models)
*[[Dragon]]
*[http://en.wikipedia.org/wiki/TRS-80_MC-10 MC-10 Micro Color Computer]
*[[CP400]]
*[[TDP-100]]
*[[LZ Color64]] Brazilian clone
*[[Dynacom MX-1600]] Brazilian clone

==Tandy/Radio Shack Tape Drive Systems==
*[[CCR-81 (26-1208)]]
*[[CCR-82]]
*[[CCR-83]]

=== Other Tape Drive Systems ===
*[[Exatron Stringy Floppy]]

== Floppy Disk Controllers ==

* [[Other Floppy Disk]] - notes and information about the CoCo FD controllers

=== Tandy/Radio Shack floppy disk controllers ===
* [[26-3022]]
* [[26-3029]]
* [[FD-500 (26-3129)]]
* [[FD-501 (26-3131)]]
* [[FD-502 (26-3133)]]

=== Third party floppy disk controllers ===
* [[SDC Floppy Emulator]]
* [[Disto Super Disk Controller]]
* [[Disto Super Disk Controller II]]
* [[Disto Mini Controller]]
* [[J&M/Owl-Ware]]
* [[Hard Drive Specialists]]
* [[Sardis Technologies 'no-halt' Controller]]

=== Hacking floppy disk ===
*[[Hacking Disk]] 40, 80 Track, 2 Sides
*[[26-3029 CoCo Disk Controller High Density Modifications]] - ([http://users.digitalindigo.net/~techno/coco_floppy.html source])

=== Alternate floppy disk controller ROMs ===
*[[ADOS/ADOS-3]]
*[[RGBDOS]]
*[[JDOS]]
*[[MYDOS]]
*[[CDOS]]
*[[OWLDOS]]
*[[HDB-DOS]]

==Hard Drive Controllers==
* [[Disto Hard Disk II Adapter]]
*[[Tandy Hard Drive Controller]]
* [[CoCo XT]] / CoCo XT-RTC by [[Burke & Burke]]
*[[KenTon]] - SCSI
*[[Gleside IDE Interface]]
*[[Cloud-9 SuperIDE Interface]]
*[[Cloud-9 TC^3 SCSI Interface]]
*[[Owl-Ware]]

==Input Devices==

=== Tandy / Radio Shack ===
*[[Joystick]]
*[[Deluxe Joystick]]
*[[Color Mouse]] (1 Button)
*[[Deluxe Color Mouse]] (2 button)
*[[Tandy Hi-Res Joystick Adapter]]
*[[Pistol Grip Joystick]]

=== Third party ===
*[[CoCo-150]] - Flight Sim Yoke, Alban Scientific, [https://archive.org/details/rainbowmagazine-1985-02/page/n273/mode/2up ''The Rainbow'' Feb 1985]
*[[The Glove]]
*[[Le Stick]]
*[[Wico Deluxe Joystick]]
*[[WICO Computer Command Trackball]]
*[[WICO Computer Command Analog Joystick]]
*[[HJL-57 upgrade Keyboard]]
*[[X-Pad]]
*[[Koala Pad]]
*[[Diecom Light Phaser Interface]]
*[[Comrex ComMander Deluxe]]
*[[Altai DR-2B]]
*[[Spectrum Mach II Joystick]]
*[[Spectrum Paddle]]
*[[Spectrum Stick]]
*[[MAXX Flight Control Yoke]] - [https://www.radioshackcatalogs.com/flipbook/cm1991_software_buyers_guide.html?fb3d-page=71| 1991 Software Buyers Guide p. 71] listed it as CoCo compatible. Cat. No. 900-2176
*[[Advanced Gravis Mark VI Competition Joystick]] - [https://www.radioshackcatalogs.com/flipbook/c1991_rsc-22.html?fb3d-page=38| RSC-22 p.38] listed Tandy-specific version Cat. No. 900-2380, also advertised in ''The Rainbow'' starting around Feb 1989.

=== Accessories ===
*[[Atari to CoCo Joystick Adapter]]
*[[Colorware Super Hi-Res Interface]]
*[[Hawksoft Dual Hi-Res Joystick Adapter]]
*[[Puppo Keyboard Adapter]]
*[[OWL Keyboard Adapter]]
*[[Cloud-9 AT Keyboard Adapter]]

==Memory Upgrades==
*[[Tandy 512K Upgrade]]
*[[Performance Peripherals 512K Upgrade]]
*[[Cloud-9 Triad 512K SRAM Upgrade]]
*[[Boyson Tech Boomerang 512K Upgrade]]
*[[Disto 512K Upgrade]]
*[[Disto 1MB Upgrade]]
*[[Disto 2MB Upgrade]]

==MIDI Interfaces==
*[[CoCo MIDI]]
*[[MIDI Maestro]] and [[MIDI Maestro+]]

== Monitors and displays ==

* Radio Shack
** 26-3010 - [[TRS-80 Color Video Receiver]] introduced in the [https://www.radioshackcatalogs.com/flipbook/c1981_rsc-04.html?fb3d-page=30| 1981 Radio Shack Computer Catalog RSC-4] and the [https://www.radioshackcatalogs.com/flipbook/1981_radioshack_catalog.html?fb3d-page=174| 1981 Radio Shack main catalog].
** 16-230 - 13" color TV, model number TC-130. Introduced in [https://www.radioshackcatalogs.com/flipbook/1983_radioshack_catalog.html?fb3d-page=154| the 1983 general Radio Shack catalog], and shown as the CoCo's display in [https://www.radioshackcatalogs.com/flipbook/1983_radioshack_catalog.html?fb3d-page=184| that same catalog's back cover]. Also shown on [https://www.radioshackcatalogs.com/flipbook/c1983_rsc-08.html?fb3d-page=01| the cover of 1983's Radio Shack Computer Catalog RSC-8] and [https://www.radioshackcatalogs.com/flipbook/c1983_rsc-08.html?fb3d-page=31| once in the CoCo section] where the Color Video Receiver was still more prominent. Not fully shown in the interior of an RSC [https://www.radioshackcatalogs.com/flipbook/c1983_rsc-09.html?fb3d-page=46| until RSC-9 later in 1983].
** 16-231 - a 13" TV. Introduced in the [https://www.radioshackcatalogs.com/flipbook/1985_radioshack_catalog.html?fb3d-page=104| 1985 Radio Shack main catalog]. Shown as the display [https://www.radioshackcatalogs.com/flipbook/1985_radioshack_catalog.html?fb3d-page=164| in the CoCo's listing in that same catalog] as well as (in 1985's RSC-12 Computer Catalog) on both [https://www.radioshackcatalogs.com/flipbook/c1985_rsc-12.html?fb3d-page=01| the cover] and [https://www.radioshackcatalogs.com/flipbook/c1985_rsc-12.html??fb3d-page=50| the CoCo's own listings].
** 16-232 - a 13" TV/Video Monitor. Introduced in the [https://www.radioshackcatalogs.com/flipbook/1986_radioshack_catalog.html?fb3d-page=89| 1986 Radio Shack main catalog]. Shown as the display in [https://www.radioshackcatalogs.com/flipbook/1986_radioshack_catalog.html?fb3d-page=166| the CoCo's listing in that same catalog] as well as in [https://www.radioshackcatalogs.com/flipbook/c1986_rsc-15.html?fb3d-page=42| 1986's Radio Shack Computer Catalog RSC-15].
** 16-233 - a 13" TV, model number TC-171. Introduced in the [https://www.radioshackcatalogs.com/flipbook/1988_radioshack_catalog.html?fb3d-page=99| 1988 Radio Shack main catalog]. Also shown as the display [https://www.radioshackcatalogs.com/flipbook/1988_radioshack_catalog.html?fb3d-page=162| in the CoCo 2's listing in that same catalog] and in [https://www.radioshackcatalogs.com/flipbook/c1988_rsc-19.html?fb3d-page=26| 1988's Radio Shack Computer Catalog RSC-19].
* Tandy
** [[CM-8]] Specifically made for the CoCo 3. Affordable but no composite input, thus many CoCo 1/2 programs would show in black-and-white.
** [[RGB-11]] [https://colorcomputerarchive.com/repo/Documents/Manuals/Hardware/RGB-11%20Color%20Monitor.pdf Listed in the Color Computer Archive]. Perhaps only for composite input use rather than RGB.
** [[VM-4]] Mentioned by [[Marty Goodman]] as being [https://archive.org/details/rainbowmagazine-1987-08/page/n71/mode/2up "perfectly compatible" with the CoCo 3] - but being monochrome was best for text use. Perhaps any monochrome composite monitor would work.
* Magnavox
**[[1CM135]]
**[[8CM505]]
**[[8CM643]]
**[[8CM515]] - Analog RGB and composite color. The August [[Rainbow_Magazine_1987|1987]] ''[[Rainbow]]'' ran a [https://archive.org/details/rainbowmagazine-1987-08/page/n141/mode/2up favorable review by Ed Ellers (p.140-141)] and a [https://archive.org/details/rainbowmagazine-1987-08/page/n71/mode/2up recommendation from Marty Goodman (pp. 70,73,75)]. [[Cloud-9]] [http://www.frontiernet.net/~mmarlette/Cloud-9/Hardware/Video%20Cables.html still offers a CoCo 3 adapter cable].
* Sony
**[[KV-1311CR]]. Howard Medical Computers and [[Spectrum Projects]] sold CoCo 3 cables for the analog RGB connection.
**[[KX-1211HG]]

*[[15KHz SVGA Monitors]]

==Arithmetic Processor Units==
*[https://github.com/barberd/coco9511pak CoCo AM9511 Pak]

==Multi Devices==
These are items that serve more than one purpose, such as Cloud-9's SuperBoard.
*[[SuperBoard]]
*[[FHL Eliminator]]
*[[Disto MEB]]

==RS232 Devices==
*[[Deluxe RS232 Pak]]
*[[Direct Connect Modem Pak]]
*[[Orion Technologies RS232 Pak]]
*[[Disto RS232 Pak]]
*[[PBJ Dual Serial Port Pak]]
*[[Kenton Dual Serial Port Pak]]
*[[Quad Serial Port Pak]] - Who made this?
*[[CoCoPro! RS232 Pak]]
*[[CoNect Dual RS232 Pak]]
*[[CoNect RS232 Pak]]
*[[CoNect 16550 Pak]] - what is the official name?
*[[Metric Model 101p Serial to Parallel Converter]]
*[[Dayton Industries Blue Streak Ultima Serial to Parallel Converter]]
*[https://github.com/barberd/cocousbserial CoCo USB Serial Pak]

==Video Digitizers==
*[[Rascan]]
*[[DS-69 Digisector]]

== Video Out==
*[[Video without RF Box]]
*[[PBJ Wordpak/Wordpak II]]
*[[Lucas Industries 2000 AutoDim]]
*[[CoCo 1 Monochrome Video]]
*[[CoCo-1 composite video]]
*[[CoCo-2 Composite Monitor Adapter]]
*[[CoCo-3 RGB to CGA/EGA Adapter]]
*[[RGB to VGA Converter]]
*[[RGB to S-Video Converter]]
*[http://cocovga.com/ CoCoVGA for CoCo 1, 2, MC-10, Dragon]
*[https://thezippsterzone.com/2019/03/27/gime-x/ GIME-X for CoCo 3]
*[https://hackaday.io/project/7366-coco-3-rgb-to-scart-to-hdmi-cable CoCo 3 RGB -> SCART -> HDMI]

== Light Controller ==
*[[X10 Lighting Control]]
*[[Remote Command Controller 26-1182]]

== Mods & Hacking ==
*[[CoCo Turbo Light]]
*[[DCModem to RS232 Pak]]
*[[Disk Drive power LED]]
*[[CoCo repack in PC]]
*[[Speech & Sound Pack Modification for High Speed]]
*[[CoCoEPROMpak]] Schematic board
*[[Fahrfall]] New Game Cartridge and pak
*[https://www.thingiverse.com/thing:2247877/ Nowhereman999's Color Computer 3D printable Raspberry Pi case]

[[Category:Hardware]]

Terry Steen

2023-05-22T14:39:30Z

MagicFab: /* Software */ Added sofwtare mentioned in the CoCoTalk interview

<onlyinclude>{{InfoBox |
| boxtype = Person
| name = Terry Steen
| photo =
| caption = Terry Steen
| date =
| year =
| enddate =
| endyear =
| location = Virginia
| interface =
| notes = T&D Software, JARB programmer
| infosource = [[Software]] page, various
}}</onlyinclude>

== Software ==

=== Games ===
* Balloon Fire - 1984
* Able Builders - 1984
* Snafus - 1984
* Gun Fighter - 1984
* Gray Lady - 1984
* Mrs. Pac - 1986
* Kick Guy - 1986-11

=== Other ===
* New Command - BASIC extended commands
* Music - 2-voice music generator
* Crypto - encrypt/decrypt a file using a password
* DIR sort
* The Bible Project

== Publications ==

== Press ==

* [https://www.youtube.com/watch?v=ZajAfkBE7Ms CoCoTalk Episode 259 - Special Guest Terry Steen] @ youtube.com

Terry Steen

2023-05-22T14:07:02Z

MagicFab: Added Kick Guy

<onlyinclude>{{InfoBox |
| boxtype = Person
| name = Terry Steen
| photo =
| caption = Terry Steen
| date =
| year =
| enddate =
| endyear =
| location = Virginia
| interface =
| notes = T&D Software, JARB programmer
| infosource = [[Software]] page, various
}}</onlyinclude>

== Software ==

* Balloon Fire - 1984
* Able Builders - 1984
* Snafus - 1984
* Gun Fighter - 1984
* Gray Lady - 1984
* Mrs. Pac - 1986
* Kick Guy - 1986-11

== Publications ==

== Press ==

* [https://www.youtube.com/watch?v=ZajAfkBE7Ms CoCoTalk Episode 259 - Special Guest Terry Steen] @ youtube.com

Terry Steen

2023-05-22T13:43:23Z

MagicFab: Added CoCoTalk interview

<onlyinclude>{{InfoBox |
| boxtype = Person
| name = Terry Steen
| photo =
| caption = Terry Steen
| date =
| year =
| enddate =
| endyear =
| location = Virginia
| interface =
| notes = T&D Software, JARB programmer
| infosource = [[Software]] page, various
}}</onlyinclude>

== Software ==

* Balloon Fire - 1984
* Able Builders - 1984
* Snafus - 1984
* Gun Fighter - 1984
* Gray Lady - 1984
* Mrs. Pac - 1986

== Publications ==

== Press ==

* [https://www.youtube.com/watch?v=ZajAfkBE7Ms CoCoTalk Episode 259 - Special Guest Terry Steen] @ youtube.com

Terry Steen

2023-05-22T13:39:26Z

MagicFab: First draft

CoCo Quick Reference

2023-05-22T13:32:45Z

MagicFab: /* I want to get rid of my old CoCo stuff */

{{NavHelp}}
If you are looking for information or help with the Tandy/Radio Shack TRS-80 Color Computer (CoCo), here is where to start.
== I want to save my old CoCo software ==
If you have old Color Computer software on cassette tapes or floppy disk, you can get this software copied over to a PC/Mac/Linux machine and run it in a [[Emulators|Color Computer emulator]].

== I want to get rid of my old CoCo stuff ==
If you have old CoCo hardware or software that you need to get rid of, your first step should be to check the [[Internet Resources|Buy & Sell section here]]. You can also e-mail the hundreds of members on the [[CoCo Mailing Lists]].

== I want to get my CoCo running again ==
If you are trying to get a CoCo running again, and need help or replacement parts, here are some resources. Details to be added.
* [[Cloud-9]] produces hardware add ons for the CoCo, including SCSI/IDE/compact flash hard drive interfaces, PS/2 keyboard interfaces, memory updates, and much more. They also offer replacement DISK BASIC ROMs that support hard drive access, or remote DriveWire access through BASIC.
* If you want to expand without buying new hardware, check out the '''free''' [[DriveWire]] project. It allows a PC/Mac/Linux machine to act as a remote disk system for the CoCo. Current DriveWire allows the CoCo to print to a virtual printer on the PC, copy files to/from disk images on the PC, and even play MIDI music files through the PC. There is also support for internet access, allowing a terminal program on the CoCo to "dial" out to remote internet systems.
* Check out Darren Atkinson's [[CoCoSDC]] floppy drive interface replacement. This cartridge emulates a real Radio Shack disk drive controller but writes to disk image files on an SD card instead of a real floppy. You could plug up your old floppy controller and the CoCoSDC (using a Multi-Pak) and then archive all your old floppies to SD card for easy backup. Then, you could have thousands of CoCo floppies available from one cartridge.
* Download a copy of "Tandy's Little Wonder" from ftp://maltedmedia.com/coco/MAGAZINES/Tandy%27s%20Little%20Wonder/. The most recent version is named "CoCobook-TLW2.pdf". Read the "1 READ ME FIRST.txt" file first. This book has history, repair information, and a "survival/user" guide that will be very helpful.

== I want to meet other CoCo folks ==
* Attend the yearly [[Chicago_CoCoFEST!]], hosted by the Glenside Color Computer Club.
* Contact other CoCo users on the Internet via e-mail. See [[CoCo Mailing Lists]].

== Is OS-9 still around? ==
* [[NitrOS-9]] project.

== Is there anything new going on with CoCo stuff? ==
* The yearly [[Chicago_CoCoFEST!]] conventions are still going.
* 2014: Darren Atkinson's [[CoCoSDC]] floppy drive replacement that uses SD cards instead of diskettes.
* 2014: CoCo 3 RGB to VGA adapter project.
* Software!

== I want to run old CoCo software, but don't have a CoCo ==
* Check out the various free [[Emulators]] that let you do this on a PC, Mac or Liunx machine (even a $25 Raspberry Pi).

Category:People

2023-05-22T13:29:16Z

MagicFab: /* Other Folks */

{{NavPeople}}

Here we can create pages for all the known CoCo folks, by category (programmers, hardware designers, writers, etc.) and any that register for accounts here can just link their personal info page to the page here. If that happens.

==OS-9 Notables ==
*[[Chris Burke]] - Burke & Burke Software.
*[[Kevin Darling]]
*[[Alan DeKok]]

==Game Greats==
*[[Steve Bjork]] - Datasoft/SRB Software author of many Radio Shack games.
*[[Dave Dies]]
*[[Nickolas Marentes]]

==Other Folks==
*[[Al Dages]] - Atlanta Computer Society.
*[[Allen Huffman]] - Sub-Etha Software, CoCo Chronicles (CoCoFest reports).
*[[Bob Rosen]] - Owner of Spectrum Projects
*[[Carl Boll]] - SysOp of ChiCoCo BBS and OS-9 advocate
*[[Carl Kreider]] - OS-9 expert and creator of the AT-306
*[[Chet Simpson]]
*[[David Wordell]]
*[[Eddie Kuns]]
*[[Eric Crichlow]] - Author of ShellMate and Gold Runner
*[[Gene Heskett]] - NitrOS-9 contributor
*[[James Jones]] - Former Microware employee and Compiler Guru
*[[Joel Hegberg]] - Prolific CoCo and MM/1 software developer
*[[John Strong]] - Founder of StrongWare
*[[Lawrence C. "Lonnie" Falk]] - Founder and publisher of Rainbow Magazine
*[[Lee Veal]] - Proud owner of CoCo #00001
*[[Lester Hands M.D.]] - author of [[Lyra]], [[Musica]] 1 & 2, and [[Coco Midi]] 1, 2, 3, & Pro
*[[Mark Marlette]] - CoCo hardware guru and founder of Cloud-9
*[[Marty Goodman]] - Famed CoCo columnist and hardware guru
*[[Mike Haaland]]
*[[Mike Knudsen]] - Music man and author of [[Ultilmuse_III]]
*[[Paul Jerkatis]]
*[[Paul Ward]] - The man behind the MM/1
*[[R.C. Smith]] - Popular fest-goer and member of the Atlanta Computer Society
*[[Robert G. Kilgus]]
*[[Robert Gault]]
*[[Scott Griepentrog]] - StC Software, author of StG Net OS-9 Level 2 BBS package.
*[[Stewart Newfeld]] - [[Zebra Systems, Inc.]] - CoCo Graphics Designer Plus, Label Designer, Car Sign Designer, and more
*[[Terry Steen]] - T&D games programmer
*[[Terry Simons]] - Founder of Mid-Iowa Country & CoCo Club and a controversial figure in his day
*[[Tim Jenison]] - author of [[CoCo Max]] 1, involved with [[DS-69 Digisector]]
*[[Timothy Lindner]]
*[[Todd Earles]] - Microware employee and one of the "three mugateers."
*[[Wayne Green]] - Founder and publisher of 80-Micro, Hot Coco and other publications
*[[Kip Koon]] - Computer Doc - Have enjoyed all Cocos since early 1980s, OS-9, NitrOS-9, and 6x09 Projects.

==Currently Active==
*[[Dennis Bathory-Kitsz]] - provider of the ftp://maltedmedia.com/coco
*[[Luis Fernández]] - author of CoCoDskUtil For Windows, organizing MaltedMedia
*[[Aaron Wolfe]] - author of DriveWire 4 Server

Software

2023-05-22T13:25:58Z

MagicFab: Added links for Terry Steen

{{NavSoftware}}

===SOFTWARE===

'''Note''': The actual sorting process will happen on your computer using client-side JavaScript. For this reason it is only possible to use this functionality if you have JavaScript enabled in your web browser.



{| class="wikitable sortable"
|-
! scope="col" width="18%" | Title
! scope="col" width="6%" | Author
! scope="col" width="6%" | Publisher
! scope="col" width="6%" | Year
! scope="col" width="6%" | CoCo Model
! scope="col" width="6%" | RAM
! scope="col" width="6%" | Joystick(s)
! scope="col" width="6%" | Media
! scope="col" width="6%" | Type
! scope="col" width="6%" | OS
! scope="col" width="6%" | Catalog No.
! scope="col" width="6%" | 1st Appearance
|-
| [[20,000 Leagues Under the Sea]] || || || || || 4K || || Tape || Education || CB || 26-2553 || RSC-8 ||
|-
| [[3-D Brickaway]] || [[Britt Monk]] || [[Britt Monk]] and then [[Avalon Hill]] || 1982 || 1,2 or 3 || 16K || Required || Tape || Game || CB || ||
|-
| [[3-D Ghostmania]] || [[Randy S. Johnson]] || Educational Arcade Systems || 1982 || 1,2 or 3 || 16K || || Tape || Game || DECB || || ||
|-
| [[7 Card Stud]] || || Intelligent Software / Tandy || 1984 || || || || [[Program Pak]] || Game || DECB || 26-3074 || ||
|-
| [[80C Monitor]] || || The Micro Works || || || || || || Game || DECB || || ||
|-
| [[8-Ball]] || [[Charles J. Roslund]] and [[B.M. Cook]] || [[Anteco Software]] || 1st half of 1983 || 1,2 or 3 || 16K || || Tape || Game || DECB || || ||
|-
| [[A Mazing World of Malcom Mortar]] || [[Greg L. Zumwalt]] & Mark W. Easter (ZCT Systems Group) for Gamestar || Tandy/Radio Shack || 1987 || 3 ONLY || 128K || Optional || [[Program Pak]] || Game || DECB || 26-3160 || ||
|-
| [[Able Builders]] || [[Terry Steen]] || T&D Software #52 || October 1986 issue || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || DECB || || ||
|-
| [[Advanced Star Trench Warfare]] || Fred B. Scerbo || Illustrated Memory Banks || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || ECB || || ||
|-
| [[Adventure In Mythology]] || Scott Cabit || Saguaro Software || 1986 (programmed in late 1985) || 1,2 or 3 || 64K || || Tape, Disk || Game || ECB || || ||
|-
| [[Adventure in Wonderland]] || Bill Sethares || Prickly Pear Software || 1983 || 1,2 or 3 || 32K || || Tape, Disk || Game || ECB || || ||
|-
| [[Airline]] || Roger Schrag (original Atari 400/800 version by George Schwenk) || Adventure International || 1983 || 1,2 or 3 || 16K || || Tape, Disk || Game || ECB || || ||
|-
| [[Alcatraz II]] || Michael (Mike) R. Hughey || Spectral Associates || 1981 or 1982 || 1,2 or 3 || 16K || Optional || Tape, Disk || Game || ECB || || ||
|-
| [[Alphabet Zoo]] || || || 1983 || || || || [[Program Pak]] || Education || ECB || 26-3170 || ||
|-
| [[Android Attack]] ((originally called Robot Battle) || ??? Unknown || Spectral Associates || Early 1982 (original 16K Robot Battle), 1982 (32K speech version) || 1,2 or 3 || 16K (32K for speech) || Supported || Tape, Disk || Game || ECB || || ||
|-
| [[Androne]] || Robert Arnstein || Radio Shack || 1983 || 1,2 or 3 || 16K || || [[Program Pak]] || Game || ECB || 26-3096 || ||
|-
| [[Annihilator]] || Doug Kelley || Chromasette || 1983 || 1,2 or 3 || 16K || || Tape, Disk || Game || ECB || || ||
|-
| [[Apollo]] || Sylvain Payeur || Sylvain Payeur || 2001 (previously unreleased) - written in 19?? || 1,2 or 3 || 16K || || || Game || DECB || || ||
|-
| [[Apples]] || Bob Crispen || Computerware (unofficially; see <a href="bob_crispen_approval.txt">Bob Crispens approval email</a> for an explanation) || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || ECB || || ||
|-
| [[Appliance and Light]] || || || 1984 || 1,2 || || || || Utility || DECB || 26-3142 || ||
|-
| [[Arcadia]] || ??? (Flying Flipper Action) || Freeware/Shareware || 198? || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || ECB || || ||
|-
| [[Arena of Skill]] || Chuck Nivison || Freeware/Shareware || 1988 || 3 ONLY || 128K || Supported || Disk || Game || DECB || || ||
|-
| [[Arex]] || Roger Schrag (original TRS-80 Model I/III version by William Muk) || Adventure International || 1983 || 1,2 or 3 || 16K || || Tape, Disk || Game || DECB || || ||
|-
| [[Arkanoid]] || Steve Bjork || Tandy (Licensed from TAITO America Corp.) || 1989 || 1,2, or 3|| 32K (CoCo 1/2) / 128K (CoCo 3) || Supported || [[Program Pak]] || Game || ECB || 26-3043 ||
|-
| [[Art Gallery]] || || Radio Shack/Tandy || || || 4K (16K Recommended) || Optional || [[Program Pak]] || Art || CB || 26-3061 || RSC-6
|-
| [[Astro Blast]] || Ron Krebs || Mark Data Products || 1982 || 1,2 or 3 || 32K (disk), 16K (tape) || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Astroblast]] || || Dragon Data Ltd || || || || || || Game || DECB || ||
|-
| [[Athletyx]] || Ken Kalish || Microdeal Cornwall (for Dragon-32 and Dragon-64) || 1985 (Programmed in 1984) || 1,2 or 3 || 32K || Supported || || Game || DECB || ||
|-
| [[Atom]] || || Tandy || 1983 || || || || [[Program Pak]] || Game || ECB || 26-3149 ||
|-
| [[Audio Spectrum Analyzer]] || Steve Bjork || Radio Shack (Datasoft) || 1981 || 1 or 2 ONLY || 4K || || [[Program Pak]] || Utility || CB || 26-3156 || RSC-8
|-
| [[Avenger]] || ??? || The Cornsoft Group || 1982 || 1,2 or 3 || 16K || || Tape, Disk || Game || DECB || ||
|-
| [[Backgammon]] || || Distributed by Radio Shack || 1980-1981 || 1,2 or 3 || 4K || Optional || [[Program Pak]] || Game || CB || 26-3059 || RSC-6
|-
| [[Bagasaurus]] || ??? (Childrens Computer Workshop). There is some comments in the game code: "The Bagasaurus Production Team: David Behrman, Jonathan Cohen, Angela Green, Gavrielle Levine, Jenny Howland, Seth Meyers, Janice Mueller, Barbara Stewart, Jefferson Stonier, Debbie Weinberger." || Tandy Corporation || Late 1983 || 1,2 or 3 || 32K || Supported || Disk || Game || DECB || ||
|-
| [[Bagitman]] || Mike Roberts || Aardvark || 1983 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Balloon Attack]] || Chris Keyes || ??? (T&D Software or Chromasette?) || 198? || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Balloon Fire]] || [[Terry Steen]] || T&D Software (Issue #27) || 198? || 1,2 or 3 || 32K || || Tape, Disk|| Game || (D)ECB || ||
|-
| [[Bash]] || Steve Bjork || SRB Software and Game Point Software || 1989 || 1, 2 or 3 || 128K (CoCo 3), 64K (CoCo 1/2) || Supported || Disk || Game || DECB || ||
|-
| [[BASIC Aid v 1.2]] || || Eigen Systems || || || || || || Utility || DECB || ||
|-
| [[Battle of Gettysburg]] || James Woodruff || Softwride || 1982 || 1,2 or 3 || 16K || Required || Tape || Game || ECB || ||
|-
| [[B.C. Bill]] || ??? || Imagine Software (England) || 1984 || 1,2 or 3 || 32K || || Disk, tape || Game || DECB || ||
|-
| [[Beam]] || Warren Ulrich III || [[Computerware]] || 1984 || 1,2 or 3 || 16K || || Tape, Disk || Game || [[Computerware|CBC2.0]] [http://www.lcurtisboyle.com/nitros9/beam.html|1] || ||
|-
| [[Beam Rider]] || ??? (D&D Software) || Spectral Associates || 1983 || 1,2 or 3 || 16K || || Tape, Disk || Game ||(D)ECB || ||
|-
| [[Bedlam]] || Robert Arnstein || Tandy/Radio Shack || 1982 || 1,2 or 3 || 16K || No || Tape || Game || CB || 26-3312 || RSC-8
|-
| [[Berserk]] (changed name to Haywire in late 1982) || Ron Krebs || Mark Data Products || 1981 || 1,2 or 3 || 16K (Tape), 32K (Disk) || Supported || Tape, Disk || Game ||(D)ECB || ||
|-
| [[Beyond the Cimeeon Moon]] || Kevin Herrboldt and Tim Nelson || Nelson Software Systems (later ColorQuest) || 1982 || 1,2 or 3 || 32K (Disk), 16K (Tape) || || || Game || (D{ECB || ||
|-
| [[Bingo Math]] || || || || || || || || Education || CB || 26-3150 || RSC-4
|-
| [[Birds]] || Andrew Hubbell || Tom Mix Software || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Blackboard]] || || [[Children's computer workshop]] || 1983 || || || || || Education || || ||
|-
| [[Blackbeards Island]] || Greg Miller, design by Eric Nelson, art by Pamela Dawn Miller || Novasoft (Tom Mix Software subsidiary) || late 1984 || 1,2 or 3 || 32K || || Disk || Game || DECB || ||
|-
| [[Blackjack]] || Doug and Kevin Leany || Tom Mix Software || 1984 || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Blackjack Royale]] || J. M. Nowicki || Second City Software || 1988 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Blochead]] || ??? || Computerware || 1983 || 1,2 or 3 || 16K || || Tape, Disk || Game || DECB || ||
|-
| [[Blox]] || Chet Simpson || Hyper Tech Software (Freeware release) || 1991 || 3 ONLY || 128K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Bouncing Boulders]] || Dave Dies and Roland Knight || Diecom Products || 1986 || 1,2 or 3 || 64K || Supported || Tape, Disk || Game || DECB || ||
|-
| [[Boxshoot]] || A. Pakerski || [[Chromasette]] || 198? || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Biosphere]] || [[Tandy Corp.]] || [[Tandy Corp.]] || 1985 || 1,2 or 3 || 64K || || Disk || Game, Simlation || DECB || 26-3280 ||
|-
| [[Brew Master]] || Rodger Smith || Novasoft (Tom Mix subsidiary) || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Brick Pong]] || A. Pakerski || T&D Software (Issue #10) || 198? || 1,2 or 3 || 16K || Two Required || Tape, Disk || Game || (D)ECB || ||
|-
| [[Bridge Tutor]] || Philidor Software) || Tandy/Radio Shack || 1982 || 1,2 or 3 || 16K || Optional || [[Program Pak]] || Game || CB || 26-3158 || RSC-8
|-
| [[Bugs]] || [[Dave Shewchun]] and [[Roland Knight]] || [[Color Computer Magazine]] || 1983 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Bugs II]] || [[Dave Shewchun]] and [[Roland Knight]] || [[Color Computer Magazine]] || 1984 || 1,2 or 3 || 64K || || Disk or tape || Game || (D)ECB || ||
|-
| [[Bumpers]] || Charles Wallace || Mark Data Products || 1983 || 1,2 or 3 || 32K (Disk/Tape) / 16K (Tape) || Supported|| Tape, Disk || Game || (D)ECB || ||
|-
| [[Bustout]] || || TDP Electronics || 1981 || || || || [[Program Pak]] || Game || CB || 26-3170 ||
|-
| [[Buzzard Bait]] || Robert Lech & Troy Dahlman (Rugby Circle Inc.) || Tom Mix || 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Buzzworm]] || Lee Earle || Novasoft (Tom Mix Software subsidiary) || Late 1984 || 1,2 or 3 || 32K || Optional || Tape, Disk || Game || (D)ECB || ||
|-
| [[Caladuril: Flame of Light]] || Dave Triggerson and Jeff Noyle || Diecom Products || 1987 (Diecom release) and 1989 (Oblique Triad re-release) || 1,2 or 3 || 64K || || Disk || Game || DECB || ||
|-
| [[Calixto Island (graphic version)]] || || Mark Data Products || End of 1983 or beginning of 1984 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Candy Co.]] || David W. Clark, sound by Bob Miller || Intracolor || 1984 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Canyon Climber]] || James Garon (Datasoft) || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || Supported || [[Program Pak]] || Game || ECB || 26-3089 || RSC-9
|-
| [[Card Games]] || || || || || 16K || Optional || Tape || Game || ECB || 26-3320 || RSC-9
|-
| [[Cards And Slots]] || ??? (Nimbus Enterprises) || MicroDeal || 1989 (original Tom Mix version was 1986) || 3 ONLY || 128K (RGB Recommended) || Optional || Disk || Game || DECB || ||
|-
| [[Cashman]] || Bill Dunlevy and Doug Frayer || Computer Shack (later Michtron) || July, 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Castle Guard]] || The Image Producers || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || Supported || [[Program Pak]] || Game || ECB || 26-3079 || RSC-9
|-
| [[Castle of Tharoggad]] || Scott A. Cabit (Computerware) || Tandy/Radio Shack || 1988 || 3 ONLY || 128K || Required || [[Program Pak]] || Game || ECB || 26-3159 ||
|-
| [[Catacomb (CC3)]] || L. Miller || Free/Shareware release || 1987? || 3 ONLY || 128K || Supported || Disk || Game || DECB || ||
|-
| [[Catacomb (Oregon Computer Systems version)]] || Roger Smith || Oregon Color Computer Systems || 1983 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Catalyst]] || J. Weaver Jr. (Factory Programming), game concept by Paul Howe || Computer Shack (later Michtron) || 1983 || 1,2 or 3 || 32K || Optional || Tape, Disk || Game || (D)ECB || ||
|-
| [[Catch Em]] || Dave Edson || Aadvark-80 || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Caterpillar (Dave Edson)]] || Dave Edson || Aadvark-80 || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Caterpillar (David Crandall)]] || David Crandall || David Crandall || 2001 (previously unreleased... written in 1983? || 1,2 or 3 || 16K || 2 Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Caterpillar Cave]] || A. Pakerski || T&D Software || 1983 || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Cave Hunter]] || Ron Krebs || Mark Data Products || 1981 || 1 or 2 ONLY || 16K (Tape), 32K (Disk) || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Cave Walker]] || Spectral Associates || Radio Shack/Tandy || 1986 || 1, 2, or 3 || 64K || Required || Disk || Game || OS-9 (included), DECB || 26-3246 || ||
|-
| [[Caviator]] || Rodger Smith || T&D Software || 1984(?) || 1,2 or 3 || 64K, 32K || Supported || Disk || Game || DECB || ||
|-
| [[CC-Thello]] || ??? || Spectral Associates || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || DECB || ||
|-
| [[Chambers]] || John Crane || Tom Mix Software || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || DECB || ||
|-
| [[Champion]] || Glen R. Dahlgren || Originally Mark Data Products, then Sundog Systems || around Christmas, 1986 || 1,2 or 3 || 64K || Supported || Disk || Game || DECB || ||
|-
| [[Child Pace]] || ? || Radio Shack/Tandy || 1986 || 1,2 or 3 || 64K || || Disk || Education || DECB || 26-3248 || [https://www.radioshackcatalogs.com/flipbook/c1986_rsc-15.html?fb3d-page=44 RSC-15] ||
|-
| [[GFL Championship Football II]] || [[Greg L. Zumwalt]] & Mark Easter (ZCT Systems Group) for Gamestar || Tandy/Radio Shack || 1988 || 3 ONLY || 128K || Supported || [[Program Pak]] || Game || DECB || 26-3172 ||
|-
| [[C-Hawk Football]] || Stephen Macri || Freeware (released on Compuserve) || December, 1986 || 3 ONLY || 128K || || Tape, Disk || Game || (D)ECB || || ||
|-
| [[Checker King]] || Michael Marks & Peter Jennings (Personal Software Inc.) || Radio Shack/Tandy || 1980 || 1,2 or 3 || 4K || || [[Program Pak]] || Game || DECB || 26-3055 || RSC-4 ||
|-
| [[Checkers]] || || || 1980 || || 4K || Optional || [[Program Pak]] || Game || CB || 26-3055 || ||
|-
| [[Chess]] || || || 1980 || || 4K || Optional || [[Program Pak]] || Game || CB || 26-3050 || RSC-4 ||
|-
| [[Chess SD]] || ??? (Software Dynamics) || Computer Systems Distributors || 1984 || 1,2 or 3 || 64K || || Disk || Game || DECB || ||
|-
| [[Chopper Rescue]] || Rob Shaw || Prism Software || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Chopper Strike]] || John Crane || Computer Shack/Michtron || 1983 || 1,2 or 3 || 16K/32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Circus Adventure]] || || || || || || || || || || ||
|-
| [[Civil War]] || ??? || ??? || 198? || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Clock Program]] || || || || || || || || || || ||
|-
| [[Clowns and Balloons]] || [[Steve Bjork]] || Datasoft/Tandy || 1982 || 1,2 or 3 || 16K || Required || [[Program Pak]] || Game || CB || 26-3087 || RSC-9
|-
| [[Cmemory]] || || Micro-Labs, Inc. || || || || || || Game || DECB || ||
|-
| [[Coco Extravaganza]] || Roger Valentine || Tandy Home Education Systems/John Wiley & Sons Inc || 1984 || 1,2 or 3 || 64K || || Tape (only 3 programs), Disk || Game || (D)ECB || ||
|-
| [[CocoMax 2]] || || || || || || || || Art || DECB || ||
|-
| [[CocoMax 3]] || || || || || || || || Art || DECB || ||
|-
| [[CocoMax]] || Hi-Res Pack || Colorware || || || || || [[Program Pak]] || Art || ECB || ||
|-
| [[Coco-Pinball]] || ??? || ??? (T&D Software?) || 198? || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[CocoPro! Solitaire]] || ??? || DNM Enterprises, Inc. || 1992 || 3 || 128K || 1,2,3 || Disk || Game || OS9 LII || ||
|-
| [[Color Baseball]] || [[Dale Lear]] || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || Supported || [[Program Pak]] || Game || ECB || 26-3095 ||
|-
| [[Color Car Action]] || Dave Dies || Novasoft (Tom Mix subsidiary) || 1984 || 1,2 or 3 || 64K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Color Caterpillar]] || Robert Lech & Troy Dahlman (The Rugby Circle) || Soft Sector Marketing Inc. || 1983 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Color Computer Learning Lab]] || || || || || || Tape || || Education || ECB || 26-3153 || RSC-6
|-
| [[Color Cubes]] || [[R.G. Kilgus]] || Radio Shack/Tandy || 1981 || 1,2 or 3 || 4K || Tape Optional || [[Program Pak]] || Game || CB || 26-3075 || RSC-8
|-
| [[Color Diagnostics v 2.0]] || || || || || || || || Utility || DECB || AXX-2023 ||
|-
| [[Color File]] || || Tandy || || || 4K || Tape and Printer Optional || [[Program Pak]] || Office || CB || 26-3103 || RSC-6
|-
| [[Color File II]] || || Tandy || 1986 || || || || || Office || DECB || 26-3110 ||
|-
| [[Color Forth]] || || Armadillo Int'l Software / Microworks || || || || || || Programming || DECB || ||
|-
| [[Color Invaders]] || ??? || Computerware || 1981 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Color LOGO]] || [[Larry Kheriaty]] & [[George Gerhold]] || Radio Shack/Tandy || 1983 || 3 ONLY || || manual=26-2722/parent=26-2763, no teacher=26-2761 || [[Program Pak]] || Programming || DECB || 26-2722 ||
|-
| [[Color LOGO]] || [[Larry Kheriaty]] & [[George Gerhold]] || Radio Shack/Tandy || 1983 || 3 ONLY || || Disk (manual=26-2722/parent=26-2763, no teacher=26-2761) || Disk || OS || Programming || 26-2721 ||
|-
| [[Color Meteoroids]] || ??? || Spectral Associates || 1981 (possibly re-released as MICROBES by Radio Shack/Tandy in 1983?) || 1,2 or 3 || 16K || 2 Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Color Power II CP/M ROM]] || || Color Power Unlimited || || || || || || OS || DECB || ||
|-
| [[Color Robot Battle]] || Del Ogren (designed by Glenn Sogge) (The Image Producers) || Radio Shack/Tandy || Late 1981 || 1,2 or 3 || 16K || || [[Program Pak]] || Game || ECB || 26-3070 || RSC-9
|-
| [[Color Scripsit]] || [[Robert G. Kilgus]] || || 1981 || || || || [[Program Pak]] || Office || CB || 26-3105 ||
|-
| [[Color Disk Scripsit]] || [[Robert G. Kilgus]] || || 1982 || || || || Disk || Office || DECB || 26-3255 || RSC-8
|-
| [[Color Scripsit II]] || || Dale Lear / Tandy || 1986 || || || || || Office || ECB || 26-3109 ||
|-
| [[Color Space Invaders]] || ??? || Spectral Associates (originally Barnett & Bank Bros.?) || 1981 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Color Term Plus]] || || Double Density Software || 1983 || || || || || Communications || DECB || ||
|-
| [[Colorchestra]] || || (one set made with Walnut) Horizon || || || || || || Music || DECB || ||
|-
| [[Colorcom/E v 3]] || || Eigen Systems || || || || || || Communications || DECB || ||
|-
| [[Colorcom/E v 4]] || || Eigen Systems / Spectrum Projects || || || || || || Communications || DECB || ||
|-
| [[Colorout]] || ??? (Colorful Software) || Spectral Associates || 1981 || 1,2 or 3 || 4K (tape), 32K (disk) || Optional || Tape, Disk || Game || (D)ECB || ||
|-
| [[Colorpede]] || David W. Clark, sound by Bob Miller || Intracolor || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Color-Trek]] || ??? || ??? (Spectral Associates) || ??? (1982?) || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Colorzap]] || James Yee || Spectral Associates || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Computer Island]] || || || || || || || || || || ||
|-
| [[Contras]] || Jeff Steidl and Doug O. Masten || Sundog Systems || 1993 (originally supposed to be 1991) || 3 ONLY || 512K || Supported || Disk || Game || DECB || ||
|-
| [[Cosmic Ambush]] || Nick Marentes || Nick Marentes (originally hoped to be distributed by Radio Shack) || 1992 || 3 ONLY || 128K || Supported || Disk || Game || DECB || ||
|-
| [[Cosmic Clones]] || Robert Shaw || Mark Data Products || 1983 || 1,2 or 3 || 16K (tape), 32K (disk) || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Cosmic Invaders]] || || Dragon Data Ltd || || || || || || Game || DECB || ||
|-
| [[Crash]] || Michel & Rejean Desjardins || Tom Mix Software || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Crazy Painter]] || Charles Guy || The Cornsoft Group || 1983 || 1,2 or 3 || 16K || Optional || Tape, Disk || Game || (D)ECB || ||
|-
| [[Crosswords]] || [[The Image Producers]] || Radio Shack/Tandy || 1981 || 1,2 or 3 || 4K || Optional || [[Program Pak]] || Game || CB || 26-3082 || RSC-9
|-
| [[Crystle Castles]] || ??? (JON is built into the high score list... initials or 1st name of the author?) || Thundervision || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Cuber]] || ??? || Tom Mix Software || 1983 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Cubix]] || Daron Stinnett || Spectral Associates || 1983 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Cuthbert Goes Digging]] || ??? || Microdeal Cornwall || 1983 || 1,2 or 3 || 16K (tape), 32K (disk) || || Tape, Disk || Game || DECB || ||
|-
| [[Cuthbert Goes Walkabout]] || ??? || Microdeal Cornwall || 1982-1983? || 1,2 or 3 || 16K (tape), 32K (disk) || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Cuthbert In The Mines]] || ??? || Microdeal Cornwall (Licensed to Tandy in Australia? Britain?) || 1984 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Cyber Tank]] || Ottmar Bochardt || Mark Data Products || 1986 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, cassette or disk. Original version only worked on Coco 1/2 (overwrote GIME regs on Coco 3) || || Game || DECB || ||
|-
| [[Cyrus World Class Chess1]] || Intelligent Software/Dragon Data || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || Optional || [[Program Pak]] || Game || ECB || 26-3064 ||
|-
| [[Dallas Quest]] || James Garon (Datasoft) (game design by Louella Lee Caraway and Phyllis Wapner, Graphics by Kelly Day and Joe Pearson) || Radio Shack/Tandy/Datasoft || 1984 || 1,2 or 3 || 32K || || Disk || Game || DECB || 26-3294 ||
|-
| [[Dancing Devil]] || Chris Latham || Tom Mix Software || 1982 || 1,2 or 3 || 16K || || Tape, Disk || Game || DECB || ||
|-
| [[Danger Ranger]] || Ken Kalish || Med Systems/Screenplay || 1983 (Written November, 1982) || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || DECB || ||
|-
| [[DASM/Demon Assembler]] || || (in box) Compusense || || || || || || Programming || DECB || ||
|-
| [[Death Trap]] || || Soft Sector Marketing || 1983 || 1,2 or 3 || 16K (tape), 32K (disk) || Supported || Tape, Disk || Game || DECB || ||
|-
| [[Deathship]] || Rodger Olsen || Aardvark-80 || 1982 || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Decathlon]] || Richard Borsheim || [[Spectral Associates]] || 1984 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Defense]] || ??? (Colorful Software) || [[Spectral Associates]] || 1982 (Colorful Software), 1984 (Spectral Associates) || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM tape, 32K RAM disk, joystick. || || Game || DECB || ||
|-
| [[Demolition Derby]] || [[John Gabbard]] - [[Spectral Associates]] || Radio Shack/Tandy || 1984 || 1,2 or 3 || 16K || Supported || [[Program Pak]] || Game || DECB || 26-3044 ||
|-
| [[Demon Attack]] || [[M. Voorsanger]] - [[Imagic]] || Tandy Corporation || 1984 || 1,2 or 3 || 16K || Supported || [[Program Pak]] || Game || DECB || 26-3099 ||
|-
| [[Demon Seed]] || Jeffrey Sorensen and Philip Mackenzie || Computer Shack/Michtron || 1983 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Demonstration Cartridge]] || || Dragon Data Ltd || || || || || || Game || DECB || A0109 ||
|-
| [[Desert Patrol]] || M.G. Lustig || Arcade Animation Inc. || 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Desert Rider]] || Steve Bjork (Color America User Group & SRB Software) || Radio Shack/Tandy || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk, joystick. || || Game || DECB || ||
|-
| [[Devil Assault]] || Ken Kalish || Tom Mix Software || 1983 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Devious]] || Ryan Olsen || Spectral Associates || 1984 || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM tape, 32K RAM disk, joystick. || || Game || DECB || ||
|-
| [[Diagnostic ROM]] || || || || || || || || Utility || CB || 26-3019 || RSC-4
|-
| [[Diagnostic Test]] || || || || || || || || Utility || DECB || ||
|-
| [[Diagnostics]] || || Radio Shack || 1980 || || || || || Utility || DECB || 26-3019 || RSC-4
|-
| [[Dig]] || A. Pakerski || T&D Software, Issue #56 (Feb. 1987 issue) || 1987 || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[Dino Wars]] || [[R.G. Kilgus]] || Radio Shack/Tandy || 1980 (probably released 1981) || 1,2 or 3 || 4K for limited features, 16K for all features|| joysticks required || [[Program Pak]] || Game || CB || 26-3057 || RSC-6
|-
| [[Disto Super RAM Disk]] || || || || || || || || Utility || DECB || ||
|-
| [[Dr. Who]] || Larry Lanberry || Prickly-Pear || 1985 || || || || || Game || DECB || ||
|-
| [[Don Pan]] || || Tomy/Tandy || 1985 || || || || [[Program Pak]] || Game || DECB || 26-3097 ||
|-
| [[Donald Duck's Playground]] || || || || || || || || || || ||
|-
| [[Donkey King (later called The King)]] || Chris Latham || Tom Mix Software || Late 1982 - renamed 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Donkey Kong]] || John Kowalski (Sock Master) and Nintendo || John Kowlaski - Freeware || March 31, 2007 || 3 ONLY || 512K || 3, 512K RAM, joystick. A 6309 does make the game run smoother, but is not required. || || Game || DECB || ||
|-
| [[Donpan]] || ??? (Tomy) || Radio Shack/Tandy || 1984 || 1,2 or 3 || 16K || Supported || [[Program Pak]] || Game || DECB || ||
|-
| [[Donut Dilemma]] || Nick Marentes || Nick Marentes (distributed by Radio Shack in Australia, Game Point Software in North America) || 1986 || 1,2 or 3 || 64K || 1,2,3 (Coco 3 features extra colors), 64K RAM, disk drive. || || Game || DECB || ||
|-
| [[Doodle Bug]] || David Crandall || Computerware || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Doodlebug]] || || || || || || || || Game || DECB || ||
|-
| [[Doubleback]] || [[Dale Lear]] || Radio Shack/Tandy || 1982 || 1,2 or 3 || 4K || 1,2,3, 4K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3091 || RSC-9
|-
| [[Downland]] || [[Michael Aichlmayr]] || Licensed to Radio Shack/Tandy through [[Spectral Associates]] || 1983 || 1,2 or 3 || 16K || 1,2 ONLY, 16K RAM, joystick. (A cracked version that will work from disk, and the Coco 3, has been done.) || [[Program Pak]] || Game || DECB || 26-3046 ||
|-
| [[Dr. Livingston]] || ??? (Softside Magazine originally, modified by E.E.M.) || ??? || 1980 (Softside Magazine), April 1982 (E.E.M.) || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Draconian]] || Mike Hughey || Tom Mix Software || 1984 || 1,2 or 3 || 32K || 1,2 or 3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Dracula - Reading is Fun]] || || || || || 4K || || Tape || Education || CB || 26-2550 || RSC-8
|-
| [[Dragon Slayer]] || Olaf Schroeder || Tom Mix Software || 1984 || 1,2 or 3 || 32K || 1,2 or 3 with 32K RAM, disk only, Optional || || Game || DECB || ||
|-
| [[Dragon Fire]] || Frank Ellis (programmer), Matthew Sarconi (artwork) || Imagic, Tandy || 1984 || || || || Program Pak || Game || || 26-3098 ||
|-
| [[Dragon32 Demo]] || || || || || || || || Game || DECB || ||
|-
| [[Dragonblade]] || Glen R. Dahlgren || Prickly Pear Software, then Sundog Systems || 1986 || 1,2 or 3 || 64K || || Disk|| Game || DECB || ||
|-
| [[Dragonfire]] || [[Frank Ellis]] (artwork by [[Matthew Sarconi]]) - [[Imagic]] || Radio Shack/Tandy || 1984 || 1,2 or 3 || 16K || Supported || [[Program Pak]] || Game || DECB || 26-3098 ||
|-
| [[Draw Poker]] || Mike Burton || Freeware || October, 1986 || 3 ONLY || 128K || 3, 128K RAM , cassette or disk. || || Game || DECB || ||
|-
| [[Droll Attack]] || ??? || T&D Software?, Issue #30 || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk. || || Game || DECB || ||
|-
| [[Dungeon Raid]] || Ken Kalish || Microdeal UK || Late 1983 || 1,2 or 3 || 16K || Originally Dragon 32/64, this version: Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Dungeons of Daggorath]] || [[Douglas J. Morgan]], [[Phil Landmeier]], [[Keith Kiyohara]], and [[April Landmeier]] - [[Dyna Micro]] || [[Dyna Micro]] / Radio Shack || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM. || [[Program Pak]] || Game || DECB || 26-3093 || RSC-10
|-
| [[Dunkey Munkey]] || Harvey Brofman || Intellectronics || 1982 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Early Games]] || || || || || || || || || || ||
|-
| [[EDIT+]] || || Compusense || || || || || || || DECB || ||
|-
| [[Editor/Assembler With ZBug]] || || || || || 16K || || [[Program Pak]] || Programming || DECB || 26-3250 || RSC-6
|-
| [[EDTASM+]] v1.0 || || (One cart in package) Microsoft || 1982 || || || || || || DECB || 26-3250 ||
|-
| [[El Bandito]] || David Crandall || Mark Data Products || Early 1983 || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM tape, 32K RAM disk, joystick. || || Game || DECB || ||
|-
| [[El Diablero]] || Ken Kalish || Computerware || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk. || || Game || DECB || ||
|-
| [[Electron]] || Steve Giesking || Spectral Associates || 1984 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Eliminator, The]] || || Frank Hogg Laboratories || || || || || || Game || DECB || ||
|-
| [[Erland]] || Tim Bremser and Lloyd Pulley || Prickly-Pear Software || 1984 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Escape 2012]] || ??? (Steve Hartford?) || Computerware || 1985 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Eye-Spy]] || David Crandall || David Crandall || 2001 (previously unreleased, written in 1983?) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, 2 joysticks (2 players only). || || Game || DECB || ||
|-
| [[F-16 Assault]] || Kevin Hoare || Diecom Products || 1986 || 1,2 or 3 || 64K || 1,2,3, 64K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Facemaker]] || [[Spinnaker Software]] || Tandy/Radio Shack || 1984 || 1,2 or 3 || 16K || 1,2 or 3, 16K RAM, cassette. || [[Program Pak]] || Game || DECB || 26-3166 ||
|-
| [[Facts Match]] || || Micro school Programs || || || || || || Education || || ||
|-
| [[Fangman]] || David Crandall || Tom Mix Software || 1984 || 1,2 or 3 || 16K || Supported || Tape, Disk|| Game || DECB || ||
|-
| [[Fembots Revenge]] || ??? (Kevin Herrboldt and Tim Nelson?) || Nelson Software Systems (later ColorQuest) || Late 1982 or early 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk. || || Game || DECB || ||
|-
| [[File Data Base]] || || home-made pak || || || || || || Office || DECB || ||
|-
| [[Fire One]] || || Ark Royal Games || 1987 || 3 ONLY || 128K || 3 ONLY, 128K RAM, cassette or disk. || || Game || DECB || ||
|-
| [[Firecopter]] || Dale Lear || Adventure International || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Fish]] || ??? || ??? || 198? || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[Flight Simulator I]] || [[Greg L. Zumwalt]] || Radio Shack/Tandy || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM disk, joystick. || || Game || DECB || ||
|-
| [[Flippy]] || Rodger Smith || T&D Software, Issue #52 (Oct. 1986 issue) || 1986 || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[Fly By]] || Brian Mirtich || Chromasette || 1982(?) || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Foodwar]] || M.G. Lustig || Arcade Animation Inc. || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Football]] || || Radio Shack/Tandy || 1980 || 1,2 or 3 || 4K || Required || [[Program Pak]] || Game || DECB || 26-3053 || RSC-4
|-
| [[Force Field]] || A. Pakerski || T&D Software, Issue #19, January 1984 || Late 1983 || 1,2 or 3 || 16K || 1/2/3, 16K RAM, disk or cassette. || || Game || DECB || ||
|-
| [[Fortress of the Mutant Waffles]] || A. Pakerski || T&D Software || 1983 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Fourcube]] || David Bush || ??? || 198? || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, Optional || || Game || DECB || ||
|-
| [[Fraction Fever]] || [[Spinnaker Software]] || Tandy Corporation || late 1984 || 1,2 or 3 || 16K || 1,2,3, 16K RAM. || [[Program Pak]] || Education || DECB || 26-3169 ||
|-
| [[Frog Trek]] || George Bahr || Oelrich Publications || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk. || || Game || DECB || ||
|-
| [[Frogger]] || ??? || The Cornsoft Group || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, Optional || || Game || DECB || ||
|-
| [[Fruit Multi-Bars Slot Machine]] || ??? (White Cloud Software) || Tom Mix Software || 1986 || 3 ONLY || 128K || 3 ONLY, 128K RAM tape or disk. || || Game || DECB || ||
|-
| [[Fury]] || Timothy Purves || Computer Shack (later Michtron) || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Fyr-Draca]] || David Lionell Dawson || ColorQuest (games division of Nelson Sofware Systems (later Softlaw)) || 1983 || 1 or 2 ONLY || 16K || 1 or 2, 16K RAM tape or disk. || || Game || DECB || ||
|-
| [[Galactic Attack]] || [[Lou Haehn]] - [[The Image Producers]] || Radio Shack/Tandy || 1982 || 1,2 or 3 || 4K || Required || [[Program Pak]] || Game || CB || 26-3066 || RSC-8
|-
| [[Galactic Fighter]] || Kevin Hoare || Four Star Software || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Galactic Taipan]] || David Cochrane || Ark Royal Games || 1983 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Galactic Trek]] || Rick McDannel || Color Compuer News (CCN) || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended Basic, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Galagon]] || Brett Keeton || Spectral Associates || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM tape or disk, joystick. 2 versions are known Tandy SSC voice supported or none Voice version, based on the arcade game Galaga || || Game || DECB || ||
|-
| [[Galax Attax]] || Tom D. Keeton || Spectral Associates || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Gantelet]] || Dave Dies || Diecom Products || 1986 || 1,2 or 3 || 64K || Optional || Tape, Disk || Game || (D)ECB || ||
|-
| [[Gantelet II]] || Roland Knight, level design and graphics by Dave Dies || Diecom Products || 1988 || 3 ONLY || 128K || Optional (2 button recommended. || Disk || Game || DECB || ||
|-
| [[Gate Crasher]] || Nick Marentes || Nick Marentes || 1999 || 3 ONLY || 512K || 3 ONLY, 512K RAM, disk. || || Game || DECB || ||
|-
| [[Gazon]] || ??? || K&K Computerware || 1982 || 1,2 or 3 || 16K || Optional || Tape, Disk || Game || (D)ECB || ||
|-
| [[Gems]] || John R. Strong || Strongware || 1991 || 3 ONLY || 128K || Optional, Orchestra-90 card optional || Disk || Game || DECB || ||
|-
| [[Germ Warfare]] || ??? || Chromasette || (198?) || 1,2 or 3 || 16K || Optional || Tape, Disk || Game || (D)ECB || ||
|-
| [[Ghana Bwana]] || Steve Bjork (SRB Software) || Radio Shack/Tandy || 1984 || 1,2 or 3 || 64K || Optional || Disk || || Game || DECB || ||
|-
| [[Ghost Attack]] || || Dragon Data Ltd || || || || || || Game || DECB || ||
|-
| [[Ghost Gobbler]] || ??? || Spectral Associates || (1982) || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Gin Champion]] || [[Philidor Software]] || Radio Shack/Tandy || 1982 || 1, 2 or 3 || 16K || 1,2,3, 16K RAM tape or disk, joystick. || [[Program Pak]] || Game || DECB || 26-3083 || RSC-9
|-
| [[Glaxxons]] || Russell Peterson || Mark Data Products || 1983 || 3 ONLY || 16K || 3 ONLY, 16K RAM, cassette or disk drive, joystick. || || Game || DECB || ||
|-
| [[Gobbler]] || David Crandall || David Crandall || 2001 (previously unreleased... written in 1982) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, 2 joysticks (2 players), tape or disk. || || Game || DECB || ||
|-
| [[Gold Runner]] || Dave Dies || Novasoft (Tom Mix Software) || 1984-1985 || 1,2 or 3 || 64K || 1,2,3, 64K RAM tape or disk, Optional || || Game || DECB || ||
|-
| [[Gold Runner 2000]] || Chet Simpson (some design work done by Eric Crichlow, from the original MM/1 version) || MediaLink Development || 1997 || 3 ONLY || 512K || 3, 512K RAM, disk, Optional || || Game || DECB || ||
|-
| [[Gold Runner II]] || Dave Dies || Novasoft (Tom Mix Software) || 1986-1987 || 1,2 or 3 || 64K || 1,2,3, 64K RAM tape or disk, Optional || || Game || DECB || ||
|-
| [[Golf]] || ??? || Aardvark-80 || 1982 || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Gomoku/Renju]] || [[Intelligent Software]] || Radio Shack/Tandy || 1982 || 1,2 or 3 || 4K || 1,2,3, 4K RAM. || [[Program Pak]] || Game || DECB || 26-3069 ||
|-
| [[Grabber]] || Mike Hughey || Tom Mix Software || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Grand Prix]] || David W. Clark, sound by Bob Miller || Intracolor || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Grand Prix Challenge]] || Dave Dies || Diecom Products || 1987 || 3 ONLY || 128K || 3, 128K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Graphic Mars]] || Roderick Smith (based on original text version by Rodger Olsen) || Aardvark Action Software (formerly Aardvark-80) || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk or tape. || || Game || DECB || ||
|-
| [[Graphic Pak]] || || || 1982 || || || || || Art || DECB || 26-3157 ||
|-
| [[Graphic Pyramid]] || Roderick Smith & Michael Roberts (based on original text version by Rodger Olsen) || Aardvark Action Software (formerly Aardvark-80) || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk or tape. || || Game || DECB || ||
|-
| [[Graphics Pak]] || || || || || || || || Art || DECB || 26-3157 || RSC-9
|-
| [[Graphitext]] || || Abacus Software || || || || || || || DECB || ||
|-
| [[Green Berets]] || Michael J. Keyes and Bill Butterworth || ??? (PD release?) || 198? || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Gremlml]] || ??? || ??? || 198? || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Greymoon]] || Bill Dunlevy || Computer Shack (later Michtron) || Late 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM tape or disk. || || Game || DECB || ||
|-
| [[Grid]] || A. Pakerski || Chromasette || 1983 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Guadal Canal]] || Phil Keeler || Ark Royal Games || 1983 || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM tape, 32K RAM disk. || || Game || DECB || ||
|-
| [[Hall of the King]] || Glen R. Dahlgren || Prickly Pear Software, then Sundog Systems || 1985 || 1,2 or 3 || 64K || || Disk|| Game || DECB || ||
|-
| [[Hall of the King II: The Inner Chambers]] || Glen R. Dahlgren || Prickly Pear Software, then Sundog Systems || 1986 || 1,2 or 3 || 64K || || Disk|| Game || DECB || ||
|-
| [[Hall of the King III: The Earthstone Revealed]] || Glen R. Dahlgren || Prickly Pear Software, then Sundog Systems || 1987 || 1,2 or 3 || 64K || || Disk|| Game || DECB || ||
|-
| [[Handball]] || ??? || Color Computer News (June 1983 issue) || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended Basic, tape or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Handyman]] || || || || || || 4K || [[Program Pak]] || Office || DECB || 26-3154 || RSC-6
|-
| [[Hangman]] || ??? || T&D Software || 1982 || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Haunted House]] || Darren Deloach and Tim Koonce (later Tim Kientzle) || Futurehouse Inc. - TRC MAgazine || late 1982 or early 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM BASIC, tape or disk. || || Game || DECB || ||
|-
| [[HDB-DOS DriveWire3]] || || || || || || || || OS || DECB || ||
|-
| [[High Speed Cassette System]] || || JPC Products || || || || || || Utility || DECB || ||
|-
| [[Hopbopper]] || Kevin Derby || Public Domain release || 198? || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Hyper Zone]] || M.G. Lustig || Computerware || 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Ice Hockey]] || Lou Fiorino || Computerware || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Ice Master]] || M.G. Lustig || Arcade Animation Inc. || 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Images 1]] || || || || || || || || Art || DECB || 26-3300 || RSC-9
|-
| [[Images 2]] || || || || || || || || Art || DECB || 26-3301 || RSC-9
|-
| [[Instrument Flight Simulator]] || William G. Franklin || Rainbow Magazine || 16K version: Programmed 1982, published June 1983; 32K version:Programmed July 1983, published August 1984. || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM Extended BASIC (version 1) or 32K RAM Extended BASIC (version 2), tape or disk. || || Game || DECB || ||
|-
| [[Intercept 4]] || J. Weaver Jr. and John L. Stahl (Factory Programming) || Computer Shack/Michtron || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Invaders Revenge]] || Ken Kalish || Med Systems/Screenplay || 1982 || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[Inventions that Changed Our Lives]] || || || || || || || || Education || DECB || 26-2625 ||
|-
| [[Investment Analysis]] || || || || || || 4K || [[Program Pak]] || Office || CB || 26-3102 || RSC-6
|-
| [[Iron Forest]] || Dave Dies (Graphics by Kevin Hoare) || Diecom Products || 1988 || 3 ONLY || 128K || 3, 128K RAM, disk only, Sega gun adaptor and Sega Phaser gun. || || Game || DECB || ||
|-
| [[Jaws (Pac Jaws)]] || Michael Freeman || ??? || 1983 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[JDOS v. 1.09]] || || J&M Controller || || || || || || OS || DECB || ||
|-
| [[Juniors Revenge]] || B.J. Chambless || Computerware || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Junkfood]] || David Taylor || Rainbow Magazine (Nov. 1984 issue) || 1984 || 1 or 2 ONLY || 16K || 1 or 2 ONLY, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Kamikaze]] || Phil Keller || Ark Royal Games || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, Optional || || Game || DECB || ||
|-
| [[Karate]] || Dave Dies || Diecom Products || Late 1985 || 1,2 or 3 || 64K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Katerpillar Attack]] || R & S Krotz || Tom Mix Software || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Kids On Keys]] || Designed by [[Freida Lekkerkerker]] for [[Spinnaker Software]] || Tandy Corporation || late 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk. || [[Program Pak]] || Education || DECB || 26-3167 ||
|-
| [[Killer Mansion]] || ??? || T & D Software || 1982 || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[Kindercomp]] || [[Spinnaker Software]] || Tandy Corporation || late 1984 || 1,2 or 3 || 16K || 1,2,3, 16K RAM. || [[Program Pak]] || Education || DECB || 26-3168 ||
|-
| [[Kingpede]] || Rodger Smith || T&D Software || July, 1987 issue || 1,2 or 3 || 32K || 1,2,3, 32K RAM tape or disk. || || Game || DECB || ||
|-
| [[Klendathu]] || Leo Christopherson || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape, Optional || || Game || DECB || 26-2567 || RSC-10
|-
| [[Knock Out]] || Dave Dies || Diecom Products || 1985 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Koronis Rift]] || Ken Rogoway (Lucasfilm Ltd., for Epyx) || Epyx, sold through Tandy/Radio Shack || 1987 (original game on other platforms released 1985) || 1,2 or 3 || 128K || 1,2,3, 128K RAM, disk only, OS-9 Level II or NitrOS9 joystick. || || Game || DECB || ||
|-
| [[Kron]] || Roger Smith || Oregon Color Computer Systems || 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Kung-Fu Dude]] || Glen R. Dahlgren || Sundog Systems || 1987 || 1,2 or 3 || 64K || || Disk|| Game || DECB || ||
|-
| [[Kyum Gai:To Be Ninja]] || Glen Dahlgren (RS-DOS version), and Glen Dahlgren/Kevin Darling/Eddie Kuns (OS-9 Version) || Sundog Systems || 1989 (RS-DOS version), 1990 (OS-9 version) || 3 ONLY || 256K, 128K || 3, 2 button joystick, disk, 128K RAM (RS-DOS version) or 256K RAM (OS-9 version). || || Game || DECB || ||
|-
| [[La Belle Lucie Solitaire]] || || Eversoft Games, Ltd. || 1990 || 3 ONLY || 128K || 3 ONLY, 128K RAM, disk, joystick. || || Game || DECB || ||
|-
| [[Labyrinth]] || Gerald Werner || Aardvark-80 || 1982 (Coding finished Nov. 19, 1981) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, Extended Basic, tape or disk. || || Game || DECB || ||
|-
| [[Lancer]] || Rick Lamont || Spectral Associates || 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Lander]] || A. Pakerski || T&D Software || 1983 || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[Lansford Mansion]] || Dave Shewchun and Roland Knight (graphics by Kevin Hoare) || Diecom Products || 1987 || 1,2 or 3 || 64K || || Disk|| Game || DECB || ||
|-
| [[Le Mans]] || Rick Lamont || Spectral Associates || 1982 || 1,2 or 3 || 16K || 1,2,3, one or two joysticks, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Leisure Suit Larry in the Land of the Lounge Lizards]] || Al Lowe (original program), Chris Iden (Coco/OS-9 conversion) || Sierra On-Line (sold through Radio Shack/Tandy) || 1988 || 3 ONLY || 256K || 3, 256K RAM, disk only, OS-9 or NitrOS9, Optional || || Game || DECB || ||
|-
| [[Liberty Ship]] || Rodger Smith || T&D Software, issue #45 || March 1986 issue || 1,2 or 3 || 16K || Supported || Disk, Tape || Game || (D)ECB || ||
|-
| [[Little Runner]] || Charles A Husak || Rainbow Magazine || 1984 (March issue) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape. || || Game || DECB || ||
|-
| [[Lunar Lander]] || [[Greg L. Zumwalt]] || American Small Business Computers || 1981 (programmed by Feb. 12, 1981) || 1,2 or 3 || 16K || 1/2/3, 16K RAM, Extended BASIC, joystick. || || Game || DECB || ||
|-
| [[Lunar-Rover Patrol]] || Tom D. Keeton and Brett N. Keeton || Spectral Associates || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk or tape, joystick. || || Game || DECB || ||
|-
| [[Lunchtime]] || Claude R. Gagnon || Novasoft (Tom Mix Software) || 1986 || 1,2 or 3 || 32K || 1,2 or 3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Macro 80C]] || || Microworks || || || || || || || DECB || ||
|-
| [[Madam Rosas Massage Parlor]] || Bob Krotts (Coco version by James Nunke) || Softcore Software Company || 1982 || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[Madness and the Minotaur]] || || || || || || || || Game || DECB || 26-3313 || RSC-9
|-
| [[Major Istar - Under the Doomed Sea]] || B.J. Chambless || Computerware || 1984 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Marathon]] || John Fraysse || Afabear Software (Rainbow Magazine) || 1983 || 1,2 or 3 || 32K || 1,2,3, Extended Basic, 32K RAM recommended (special instructions for 16K), disk or tape, joystick. || || Game || DECB || ||
|-
| [[Marble Maze]] || Dave Dies || Diecom Products || 1985 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk or tape, joystick. || || Game || DECB || ||
|-
| [[Mars/Mars II]] || Rodger Olsen || Aardvark-80 || 1981-1982 (?) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, disk or tape. || || Game || DECB || ||
|-
| [[Martian Crypt]] || Scott Cabit (music by Ryan Sambrook) || Novasoft (Tom Mix Software) || 1985 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk or tape. || || Game || DECB || ||
|-
| [[Master Key II]] || || D Nelson/C Hohn/Computize || 1984 || || || || || Game || DECB || ||
|-
| [[Math Bingo]] || || Radio Shack/Tandy || 1980 || 1,2 or 3 || 4K || 1,2,3, 4K RAM. || [[Program Pak]] || Education || CB || 26-3150 ||
|-
| [[Math Tutor]] || || Tandy || 1988 || || || || [[Program Pak]] || Education || DECB || 26-3148 ||
|-
| [[Medieval Madness]] || Dave Dies (Graphics by Lori Dies) || Diecom Products || Late 1988 or early 1989 || 3 ONLY || 128K || 3, 128K RAM, disk only, Sega gun adaptor and Sega Phaser gun. || || Game || DECB || ||
|-
| [[Mega-Bug]] || Steve Bjork (Datasoft) || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM. || [[Program Pak]] || Game || DECB || 26-3076 || RSC 8
|-
| [[Megapede]] || Mark Skala || Computerware || 1983 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Meteoroids]] || || Dragon Data Ltd || || || || || || Game || DECB || ||
|-
| [[Mickeys Space Adventure]] || ??? (Designed by Al Lowe for Walt Disney Personal Computer Software and Sierra On-Line) || Tandy/Radio Shack || late 1986 || 1,2 or 3 || 64K || || Disk|| Education || DECB || ||
|-
| [[Micro Illustrator]] || || || || || || || || Art || DECB || 25-1120 ||
|-
| [[Micro Painter]] || || || || || 16K || || [[Program Pak]] || Art || DECB || 26-3077 || RSC-8
|-
| [[Micro Painter **]] || || DataSoft / Tandy || 1982 || || || || || Art || DECB || 26-3077 ||
|-
| [[Microbes]] || [[Spectral Associates]] || Radio Shack/Tandy || 1982 or 1983 (possibly the re-release of COLOR METEOROIDS from Spectral in 1981?) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, 2 joysticks. || [[Program Pak]] || Game || CB || 26-3085 || RSC-8
|-
| [[Microchess]] || Peter Jennings (Personal Software Inc.) || Radio Shack/Tandy || 1980 || 1,2 or 3 || 4K || 1,2,3, 4K RAM. || [[Program Pak]] || Game || DECB || ||
|-
| [[Microtext]] || || Microware || || || || || || Office || DECB || ||
|-
| [[Microworks Forth]] || || Microworks || 1981 || || || || || Programming || DECB || ||
|-
| [[Middle Kingdom]] || ???(Jaysoft) || Computerware || 1984 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Mind-Roll]] || Jesse Taylor (tested by Erik Flom and Scott Duckett) (Epyx Software). Original version by Thalamus, Ltd., 1987-1988, also called Quedex. || Tandy/Radio Shack || 1989 || 1,2 or 3 || 128K, 64K || 1,2, (64K RAM) or Coco 3 (128K RAM), Optional || [[Program Pak]] || Game || DECB || 26-3100 ||
|-
| [[Mine Rescue]] || Steve Bjork (SRB Software) || Game Point Software || 1988 || 3 ONLY || 128K || 3, 128K RAM, disk, Optional || || Game || DECB || ||
|-
| [[Miss Gobbler]] || ??? (Procolour Group Inc.) || Spectral Associates || 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Missile Attack]] || Larry F. Perry || 80 Micros || August 1982 issue || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Mission Impossible]] || Scott Adams (original 1979 version for other computers)/Roger Schrag (Coco conversion) || Adventure International || 1982(?) || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[Moby Dick]] || || || || || 4K || || Tape || Education || CB || 26-2552 || RSC-8
|-
| [[Money Pak]] || || Computer Island || || || || Extended Basic || || || || ||
|-
| [[Monkey Kong]] || Ken Kalish || Med Systems/Screenplay || 1983 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Monster Maze]] || || Radio Shack/Tandy || 1983 || 1,2 or 3 || 4K || 1,2,3, 4K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3081 || RSC-9
|-
| [[Montezumas Dungeons]] || Greg Keyser || T&D Software, Issue #26 || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Moon Defense]] || Robert Evans || Public Domain/Shareware || 1987 || 3 ONLY || 128K || 3, 128K RAM, cassette or disk. || || Game || DECB || ||
|-
| [[Moon Flight]] || Paul Griffiths || Cload Publications Inc. || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Moon Hopper]] || M.G. Lustig || Computerware || 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Moon Shuttle]] || Gerry Humphrey and James Garon || Datasoft || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, Optional || || Game || DECB || ||
|-
| [[Morocco GP]] || M.G. Lustig || Computerware || 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Mountain Pilot]] || ??? || Instant Software || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Mouse Maze]] || John Kowlaski (under his alias Sockmaster) || John Kowalski || 2001 (previously unreleased) - written in 1986 || 1,2 or 3 || 64K || 1/2/3, 64K RAM, disk. || || Game || DECB || ||
|-
| [[Mr. Dig]] || ??? || Computerware || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Ms. Maze]] || ??? || Tom Mix Software || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Mudpies]] || Jeff Sorenson and Philip McKenzie || Computer Shack/Michtron || Late 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Music]] || || || || || 4K || || [[Program Pak]] || Music || CB || 26-3151 || RSC-4
|-
| [[Nerble Force]] || David Crandall || Computerware || 1983 || 1,2 or 3 || 16K || Supported || Tape, Disk|| Game || DECB || ||
|-
| [[Neutroid II]] || Nick Marentes || Nick Marentes (originally hoped to be distributed by Radio Shack). Was released by Tom Mixs Novasoft in 1987 for a short time. || 1984 || 1 or 2 ONLY || 16K || 1 or 2 ONLY, 16K RAM, disk drive, joystick. || || Game || DECB || ||
|-
| [[New Burt]] || Mike Roberts || Mike Ro Products || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Ninja Warrior]] || Charles Forsythe || The Programmers Guild || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, Optional || || Game || DECB || ||
|-
| [[NitrOS9]] || || || || || || || || OS || DECB || ||
|-
| [[Nuclear Reactor Simulator]] || Chris Latham and John Erickson || Rainbow magazine || April 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM Extended BASIC, tape or disk. || || Game || DECB || ||
|-
| [[Nuclear Submarine Adventure]] || Robert J. (Bob) Retelle (plotted by Bob Retelle, Rodger Olsen, and ???) || Aardvark-80 || 1980 (I believe the Coco version came out in 1981 or 1982) || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Offender]] || [[Greg L. Zumwalt]] || American Business Computers || 1981 or 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Official Radio Shack Coco 3 Demo]] || || || || || || || || Demo || DECB || ||
|-
| [[One on One]] || Steve Bjork (SRB Software) based on original code for another platform by Eric Hammond || Electronic Arts; sold through Radio Shack/Tandy || 1985 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk, joystick(s). || || Game || DECB || ||
|-
| [[Orbitron]] || David Crandall || AHL Computing || 1983? || 1,2 or 3 || 16K || Supported || Tape, Disk|| Game || DECB || ||
|-
| [[Outhouse]] || J. Weaver Jr. (Factory Programming) and Larry Ashmun (uncredited) || Computer Shack (later Michtron) || 1983 || 1,2 or 3 || 32K || Optional || Tape, Disk || Game || DECB || ||
|-
| [[P-51 Mustang Attack Flight Simulator]] || Brian Bruderer || Tom Mix Software || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick, modem or null cable optional. || || Game || DECB || ||
|-
| [[Pac Droids]] || Charles Forsythe || The Programmers Guild || Late 1982 || 1,2 or 3 || 16K || 1,2,3 (3 for game only; credits/intro screen will not display properly), 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Pac-Dude]] || Brian ONeill || Shareware release || 1990 || 3 ONLY || 128K || 3 only, 128K RAM, joystick, disk only. || || Game || DECB || ||
|-
| [[PacDude Monster Maze]] || Brian ONeill (music by Chris Spry) || Brian ONeill || 1992 || 3 ONLY || 512K || 3 only, 512K RAM, joystick. || || Game || DECB || ||
|-
| [[Pack Maze]] || David Crandall || DSL Computer Products || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Pac-Man]] || Nick Marentes || Nick Marentes || 1997 || 3 ONLY || 512K || 3 ONLY, 512K RAM, disk, joystick. || || Game || DECB || ||
|-
| [[Pac-Tac]] || ??? || Computerware || 1981 || 1 or 2 ONLY || 16K || 1 or 2 ONLY, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Pac-Tac II]] || ??? || Computerware || 1983 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Pac-Tac version 2]] || Larry Bank || Not officially released || 1982(?) || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Panic Button]] || [[Paul Kanevsky]] || [[First Star Software Inc.]] (later distributed by Tandy Corp.) || late 1983 || 1,2 or 3 || 16K || 1/2/3, 16K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3147 ||
|-
| [[Panzer]] || Patrick A. Ewing || T&D Software (Issue #54) || 1986 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Paper Route]] || Dave Dies || Diecom Products || Late 1985/early 1986 || 1,2 or 3 || 64K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Pegasus and the Phantom Riders]] || David Figge (Spectral Associates) || Radio Shack/Tandy || late 1984 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk, joystick(s). || || Game || DECB || ||
|-
| [[Pelieti]] || Roger Taylor || Roger Taylor (Freeware) || February, 1991 || 3 ONLY || 128K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Pengon]] || Markus Foti (Megasoft) || Spectral Associates || 1983 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Personafile]] || || || || || || Disk || || Office || DECB || 26-3260 || RSC-8
|-
| [[Personal Finance]] || || Tandy || || || 4K || || [[Program Pak]] || Office || CB || 26-3101 || RSC-4
|-
| [[Personal Finance II]] || || two different sized manuals || 1983 || || || || [[Program Pak]] || Office || DECB || 26-3106 ||
|-
| [[Phantom Slayer]] || Ken Kalish || Med Systems (later Screenplay) || 1982 || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[Pharoahs Curse]] || ??? || ??? || 198? || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[Photon]] || Jeff Steidl (Produced by Glen Dahlgren) || Sundog Systems || 1991 || 3 ONLY || 128K || Supported || Disk || Game || DECB || ||
|-
| [[Pinball]] || || Tandy || 1980 || || 4K || Required || [[Program Pak]] || Game || DECB || 26-3052 || RSC-4
|-
| [[Pinball Factory]] || Kary McFadden || Michtron (formerly Computer Shack) || 1986 || 1,2 or 3 || 64K || 1,2 or 3, 64K RAM, disk only. || || Game || DECB || ||
|-
| [[Pioneers in Technology]] || || || || || || || || Education || DECB || 26-2624 ||
|-
| [[Pitfall II]] || Steve Bjork (SRB Software) for Activision (original, non-Coco version by David Crane) || Tandy/Radio Shack || 1985 (original, non-Coco version released 1983) || 1,2 or 3 || 64K || 1/2/3, 64K RAM, disk ONLY, joystick. || || Game || DECB || ||
|-
| [[Pitstop II]] || ??? || Epyx || 1985 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Planet Invasion]] || Steve Gieseking || Spectral Associates || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Planetarium]] || || Moreton Bay Software || 1982 || 1,2 or 3 || || Coco 1/2/3?, 16 Kb, tape or disk. || Disk/Tape || Education || || ||
|-
| [[Plateau of the Past]] || ??? || Zytek, Ltd. || 1986 || 1,2 or 3 || 32K || 1/2/3, 32K RAM, disk required. || || Game || DECB || ||
|-
| [[Polaris]] || || Radio Shack/Tandy || 1981 or 1982 || 1,2 or 3 || 4K || joystick or mouse required || [[Program Pak]] || Game || CB || 26-3065 || RSC-6
|-
| [[Poltergeist]] || ??? || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || Supported || [[Program Pak]] || Game || DECB || 26-3073 || RSC-9
|-
| [[Ponk]] || Greg Helton || Greg Helton || 1987 || 3 ONLY || 128K || 3, 128K RAM, tape or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Pooyan]] || Gerry Humphrey and James Garon (Datasoft) || Radio Shack/Tandy || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, joysticks optional. || Tape || Game || DECB || ||
|-
| [[Popcorn]] || Steve Bjork (Datasoft) || Radio Shack/Tandy || 1981 || 1,2 or 3 || 4K || Required || [[Program Pak]] || Game || CB || 26-3090 || RSC-8
|-
| [[Predator]] || || one in original package || 1989 || || || || || Game || DECB || 26-3165 ||
|-
| [[Program Catalog]] || || || || || || || || || DECB || ||
|-
| [[Programmable Sound Module]] || || Maple Leaf System || || || || || || || DECB || ||
|-
| [[Project Nebula]] || Robert Arnstein || Radio Shack/Tandy || 1982 || 1,2 or 3 || 4K || Required || [[Program Pak]] || Game || CB || 26-3063 || RSC-6
|-
| [[Prospector]] || Lee J. Chapel || Rainbow Magazine || Dec. 1988 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, joystick. || Tape, Disk || Game || DECB || ||
|-
| [[Protector II]] || Robert Black (original Atari version by Mike Potter) || Synapse Software || 1983 || 1 or 2 ONLY || 32K || 1 or 2 ONLY, 32K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Protectors]] || Ron Beatty || Tom Mix Software || Late 1982 || 1,2 or 3 || 32K || 1,2 or 3, 32K RAM, cassette or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Pumpman]] || Dave Dies || Saguaro Software || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Pursuit]] || Craig Stewart || Radio Shack Australia || 1986 || 3 ONLY || 128K || 3, 128K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Pyramid]] || || || || 16K || || Tape || || Game || DECB || 26-3310 || RSC-8
|-
| [[Pyramid 2000]] || || Radio Shack/Tandy || || || || || || Game || DECB || 26-3310 || RSC-8
|-
| [[Pyramix]] || Jordan Tsvetkoff (Colorventure) || Dr. Prebles Programs || 1987 || 3 ONLY || 128K || 3, 128K RAM, tape or disk, Optional || || Game || DECB || ||
|-
| [[Qiks]] || Ryan Olsen || Spectral Associates || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Quasar Commander]] || [[Robert G. Kilgus]] || Radio Shack/Tandy || 1980 || 1,2 or 3 || 4K (16K recommended) || Required || [[Program Pak]] || Game || CB || 26-3051 || RSC-4
|-
| [[Quest]] || Bob Retelle and Rodger Olsen || Aardvark-80 || 1982 || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[Quest For Thelda]] || Eric A. Wolf || Sundog Systems || Late 1989 or early 1990 || 3 ONLY || 128K || Supported || Disk || Game || DECB || ||
|-
| [[Quix]] || Claude R. Gagnon (original prototype by Steve Ostrom) || Tom Mix Software || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Raaka-Tu]] || Robert Arnstein(?) || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette. || || Game || CB || 26-3311 || RSC-8
|-
| [[Rad Warrior]] || Jesse Taylor (Palace Software) || Epyx (sold through Radio Shack) || 1988 || 3 ONLY || 128K || Optional || [[Program Pak]] || Game || ECB || 26-3162 ||
|-
| [[Radio Ball]] || Robert Arnstein || Radio Shack/Tandy || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape. || || Game || ECB || ||
|-
| [[Rail Runner]] || ??? || Computerware || 1982 || 1 or 2 ONLY || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Rainbow Roach]] || John Fraysse (Afabear Software) || Rainbow Magazine || June 1983 || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Rampage]] || || one in box - Tandy / Activision || 1989 || || || || || Game || DECB || 26-3174 ||
|-
| [[Rampage!]] || Steve Bjork for Activision || Tandy || 1989 || 3 ONLY || 128K || 3 ONLY, 128K RAM, Optional || || Game || DECB || ||
|-
| [[Rat Attack]] || Wayne Wood and Gerry Casey || T&D Software, Issue #28 || Written 1983, released October 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Reactoid]] || || Radio Shack/Tandy || 1983 || 1,2 or 3 || 16K || Supported || [[Program Pak]] || Game || DECB || 26-3092 || RSC-10
|-
| [[Real Talker]] || || Colorware || || || || || || || DECB || ||
|-
| [[Rear Guard]] || Jim Hurd (Coniah Software) || Adventure International || 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Recochet]] || ??? || ??? || ??? || 1,2 or 3 || 16K || Supported || Disk, Tape || Game || (D)ECB || ||
|-
| [[Rescue on Fractalus]] || Ken Rogoway (Lucasfilm Ltd., for Epyx) || Epyx, sold through Tandy/Radio Shack || 1987 || 1,2 or 3 || 128K || 1,2,3, 128K RAM, disk only, OS-9 Level II or NitrOS9 joystick. || || Game || DECB || ||
|-
| [[Return of Juniors Revenge]] || B.J. Chambless (?) || Computerware || 1986 || 3 ONLY || 128K || 3 ONLY, 128K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Return of the Jeti]] || ??? || Thundervision || 1983 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[RoboCop]] || [[Greg L. Zumwalt]] || Data East / Tandy Corporation || 1989 || 3 ONLY || 128K || 3, 128K RAM. || [[Program Pak]] || Game || DECB || 26-3164 ||
|-
| [[Robot Battle]] || || [[Spectral Associates]]/Tandy || 1981 || || || || [[Program Pak]] || Game || DECB || 26-3070 ||
|-
| [[Robot Odyssey 1, Scape from Robotropolis]] || || The Learning Company || || || || || || || || 26-3284 ||
|-
| [[Robotack]] || David W. Clark, sound by Bob Miller || Intracolor || Early 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Rogue]] || Mike L. Leber, Ron B. Miller, James Long & Ed Rosenzweig for Epyx (based on minicomputer/mainframe version by Michael Toy, Ken Arnold & Glenn R. Wichman) || Tandy/Radio Shack || 1986 || 3 ONLY || 128K || 3 ONLY, 128K RAM (256K for graphics font version). || || Game || DECB || ||
|-
| [[Roller Controller]] || ??? || Spectral Associates || 1986 || 3 ONLY || 128K || 3, 128K RAM, tape or disk, Optional || || Game || DECB || ||
|-
| [[Roman Checkers]] || [[Al Baker]] - [[The Image Producers]] || Radio Shack/Tandy || Late 1981 || 1,2 or 3 || 16K || Optional || [[Program Pak]] || Game || CB || 26-3071 || RSC-8
|-
| [[Romless Pak I]] || || Microware || || || || || || || DECB || ||
|-
| [[Romless Pak II]] || || Microware || || || || || || || DECB || ||
|-
| [[Rommel 3D]] || Kary McFadden || Michtron (formerly Computer Shack) || 1985 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Rubicon II]] || Phillip E. Keller || Ark Royal Games || 1983 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Rupert Rythym: The Music Box Caper]] || Nickolas Marentes || Now self-published, previously Game Point Software (in the U.S./Canada) and Tandy (Australia) || 1988 || 3 ONLY || 128K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[RushN Assault]] || Dave Dies || Diecom Products || 1988 || 1,2 or 3 || 64K || Supported (2 button optional) || Tape, Disk || Game || (D)ECB || ||
|-
| [[Sailor Man]] || Chris Latham || Tom Mix Software || 1984 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, joystick, cassette or disk. || || Game || DECB || ||
|-
| [[Sam Sleuth]] || Steve Hartford || Computerware || 1984 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, tape or disk, joystick or mouse. || || Game || DECB || ||
|-
| [[Sands of Egypt]] || James Garon, Ralph Burris, Steve Bjork (Datasoft) || Radio Shack/Tandy || 1982 || 1,2 or 3 || 32K || 1,2 or 3, 32K RAM, disk only. || || Game || DECB || 26-3299 || RSC-9
|-
| [[Screen Print Program]] || || || || || || || || Utility || DECB || 26-3021 || RSC-6
|-
| [[Sea Battle]] || Bob Kimball Woodward || Public Domain/Shareware (released on Compuserve) || June 14, 1987 || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Sea Dragon]] || Jim Hurd (Coniah Software) || Adventure International || Late 1982 or early 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, Optional || || Game || DECB || ||
|-
| [[Sea Search (formerly Sea Quest)]] || || Mark Data Products || End of 1983/beginning of 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk.(originally Sea Quest) || || Game || DECB || ||
|-
| [[Sea Stalker]] || ??? (original version by Stu Galley and Jim Lawrence) || Infocom || 1984 || 1,2 or 3 || 32K || 1,2 or 3, 32K RAM, disk only. || || Game || DECB || ||
|-
| [[Shamus]] || William Mataga and Larry Abel (Synapse Software) || Synapse Software in 1983, later through Radio Shack/Tandy || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape (Synapse only) or disk (as sold throught Radio Shack/Tandy), joystick. || || Game || DECB || ||
|-
| [[Shanghai]] || Rick Adams (Activision) (cartridge original), and Bill Nobel/Alan Dekok (OS-9 version) || Radio Shack/Tandy || 1987 || 3 ONLY || 256K, 128K || 3, 128K RAM, joystick (Radio Shack version), or 256K RAM, disk, Optional (OS-9/NitrOS9 version). || [[Program Pak]] || Game || DECB || 26-3084 ||
|-
| [[Shark Treasure]] || Greg W. Anderson || Computerware || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Shenanigans]] || || Mark Data Products || Late 1983 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Shiphunt]] || Wilfred H. Barber || Free Coco Software || 1984 || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[Shock Trooper]] || Rob Shaw || Mark Data Products || 1985 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Shooting Gallery]] || James Garon (Datasoft) || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || Required || [[Program Pak]] || Game || CB || 26-3088 || RSC-8
|-
| [[Shuttle Simulator]] || John Fraysse || Tom Mix Software || 1982 || 1,2 or 3 || 32K || 1,2,3, 32K RAM Extended BASIC, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Silpheed]] || RS-DOS version: C. Daron Stinnett (Synergistic Software), Robert Lindsley & Michael Ormsby (Level Design) for Sierra Online, original game by Game Arts || Radio Shack/Tandy || 1988 || 1,2 or 3 || 128K, 16K || 1,2, 16K RAM, 3 version: 128K RAM). Optional || [[Program Pak]] || Game || DECB || 26-3054 ||
|-
| [[Sinistaar]] || ??? (Phantom Software) || Sundog Systems || 1989 || 3 ONLY || 512K || 3, 512K RAM, disk only, joystick (2 button recommended). || || Game || DECB || ||
|-
| [[Skiing]] || Robert G. Kilgus || Radio Shack/Tandy || 1980 (may have been delayed until early 1981) || 1,2 or 3 || 4K (16K recommended) || Required || [[Program Pak]] || Game || CB || 26-3058 || RSC-6
|-
| [[Skramble]] || ??? || Tom Mix Software || 1983 || 1,2 or 3 || 32K, 16K || 1,2,3 16K RAM tape or 32K RAM disk, joystick. || || Game || DECB || ||
|-
| [[Sky-Defense]] || ??? || Quasar Animations || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Skyway]] || Rodger Smith || Novasoft (Tom Mix subsidiary) || 1985 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Slay The Nereis]] || [[Spectral Associates]] || Tandy Corporation || 1982 || 1,2 or 3 || 16K || Supported || [[Program Pak]] || Game || DECB || 26-3086 || RSC-10
|-
| [[Slot Machine]] || ??? || ??? || 198? || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Slot Pack II]] || || Howard Medical || || || || || || Game || DECB || ||
|-
| [[Slot Pack III]] || || (with AC adapter) Howard Medical || || || || || || Game || DECB || ||
|-
| [[Slots]] || ??? || ??? || 198? || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[Smartwatch [[Program Pak]]]] || || || || || || || || || DECB || ||
|-
| [[Snak Pac]] || Larry Bank || Tom Mix Software || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Snake Pit]] || Steve Bjork || SRB Software and Game Point Software || 1989 || 1,2 or 3 || 64K || 1,2 or 3 with 64K RAM, disk only, joystick. || || Game || DECB || ||
|-
| [[Soko-ban]] || ??? (Spectral Associates) || Tandy (licensed from Sphere Inc., which was licensed from ASCII Corp., which was licensed from Thinking Rabbit) || 1988, original copyright 1984 || 3 ONLY || 128K, 32K || 1 and 2 version - 32k RAM required; Coco 3 version, 128K RAM required, Optional || [[Program Pak]] || Game || DECB || 26-3161 ||
|-
| [[Soliddrive RAM Pak]] || || || || || || || || Utility || DECB || ||
|-
| [[Soviet Bloc]] || John R. Strong || Strongware || 1991 || 3 ONLY || 128K || 3, 128K RAM, disk ONLY, joystick optional, Orchestra-90 card optional. || || Game || DECB || ||
|-
| [[Space Ambush]] || Andy Kluck || Computerware || 1982 || 1,2 or 3 || 16K || Optional || Tape, Disk || Game || (D)ECB || ||
|-
| [[Space Assault]] || || Radio Shack/Tandy || 1981 || 1,2 or 3 || 4K || Required || [[Program Pak]] || Game || CB || 26-3060 || RSC-6
|-
| [[Space Hunter]] || || || || || || || || Game || DECB || ||
|-
| [[Space Intruders]] || Nick Marentes || Nick Marentes (distributed by Radio Shack in Australia, Game Point Software in North America) || 1988 || 3 ONLY || 128K || 3 ONLY, 128K RAM, disk drive, joystick. || || Game || DECB || ||
|-
| [[Space Marauder]] || Craig Stewart || Radio Shack Australia || 1987 || 3 ONLY || 128K || 3, 128K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Space Probe: Math]] || || || || || || || || Education || DECB || 26-2537 || RSC-10
|-
| [[Space Race]] || Rick Lamont and Daron Stinnett || Spectral Associates || 1982 || 1,2 or 3 || 16K || Optional || Tape, Disk || Game || (D)ECB || ||
|-
| [[Space Raiders]] || Brian Bruderer || Mark Data Products || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Space Wrek]] || Steve Gieseking || Spectral Associates || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Space Zapper]] || ??? || ??? || 198? || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Spectaculator]] || || Radio Shack/Tandy || || || 4K || Tape & Printer Optional || [[Program Pak]] || Office || CB || 26-3256 || RSC-8
|-
| [[Spectrum Voice Pak]] || || Spectrum Projects || || || || || || || DECB || ||
|-
| [[Speech Sound]] || || Tandy || || || || || || || DECB || 26-3144 ||
|-
| [[Speech Synthesizer]] || || Alford and Associates || || || || || || || DECB || ||
|-
| [[Speech Systems Midi - lg white pak]] || || 2 5-pin jacks on side || || || || || || Music || DECB || ||
|-
| [[Speed Racer]] || Steven Hirsch || Michtron (formerly Computer Shack) || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Spidercide]] || [[Tim Swisher]] || Tandy Corporation || 1983 || 1,2 or 3 || 16K || Supported || [[Program Pak]] || Game || ECB || 26-3049 ||
|-
| [[Spider-Hype]] || Roger Taylor || Public Domain || 1992 || 3 ONLY || 128K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Spider-Hyper]] || Roger Taylor || Public Domain || 1996 || 3 w/ 6309 upgrade || 128K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Spinster Cafe]] || Raleigh Rivers || T&D Software, Issue #78 || December, 1988 issue || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Springster]] || [[Spectral Associates]] || Radio Shack/Tandy || 1987 || 3 ONLY || 128K || Supported || [[Program Pak]] || Game || ECB || 26-3078 ||
|-
| [[Squash]] || J.R. Applegate || ??? || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, cassette or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[SR-71]] || Lee Earle || Tom Mix Software || Late 1983/early 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM Extended BASIC, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Star Blaster]] || Jim Kearney || Micro Works || 1981 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, Optional || [[Program Pak]] || Game || DECB || ||
|-
| [[StarBlaze]] || [[Greg L. Zumwalt]] || Tandy/Radio Shack || 1983 || 1,2 or 3 || 16K || Supported || [[Program Pak]] || Game || DECB || 26-3094 ||
|-
| [[Star Spores]] || David Shadoff || Spectral Associates || 1984 || 1,2 or 3 || 32K || Optional || Tape, Disk || Game || (D)ECB || ||
|-
| [[Star Trader]] || Steve Hartford || Computerware || 1984 || 1,2 or 3 || 64K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Star Trek III]] || Lance Micklus || Lance-Micklus Inc. - distributed by Adventure International || 1981 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Starfire]] || Harvey Brofman || Intellectronics || 1982 || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Starship Chameleon]] || Ken Kalish || Computerware || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Stellar Life Line]] || Steve Bjork (SRB Software) || Radio Shack/Tandy Corp. || 1983 || 1,2 or 3 || 16K || || [[Program Pak]] || Game || DECB || 26-3047 ||
|-
| [[Stereo Composer]] || || Speech Systems || || || || || || Music || DECB || ||
|-
| [[Stereo Music]] || || || 1984 || || || || || Music || DECB || 26-3143 ||
|-
| [[Storm]] || ??? || Computerware || 1982 || 1 or 2 ONLY || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Storm Arrows]] || Tom D. Keeton || Spectral Associates || 1983 (written 1982) || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Sub Battle Simulator]] || Jesse Taylor & Mike Leber || Epyx, sold through Tandy/Radio Shack || 1987 || 1,2 or 3 || 128K || 1,2,3, 128K RAM, disk only, OS-9 Level II or NitrOS9, Optional || || Game || DECB || 26-3272 ||
|-
| [[Super Bustout]] || [[Glenn Sogge]] (Designed by [[Al Baker]] and [[Dick Ainsworth]]) - [[The Image Producers]] || Radio Shack/Tandy || 1980 || 1,2 or 3 || 4K || Required || [[Program Pak]] || Game || CB || 26-3056 || RSC-6
|-
| [[Super Charger]] || || Spectral Associates || || || || || || Game || DECB || ||
|-
| [[Super Color Bug]] || || Nelson Software || || || || || || || DECB || ||
|-
| [[Super Color Stretcher]] || || Nelson Software || || || || || || || DECB || ||
|-
| [[Super Color Terminal]] || || Nelson Software || || || || || || Communications || DECB || ||
|-
| [[Super Color Writer II]] || || Nelson Software || || || || || || Office || DECB || ||
|-
| [[Super Color Writer v 1.0]] || || Nelson Software || || || || || || Office || DECB || ||
|-
| [[Super Dragon Writer]] || || || || || || || || Office || DECB || ||
|-
| [[Super Logo]] || || Larry Kheriaty/George G/Tandy || 1984 || || || || [[Program Pak]] || Programming || DECB || 26-2717 ||
|-
| [[Super Mastermind]] || Bill Nobel and Darryl Hildebrandt || Freeware || 1987 || 3 ONLY || 128K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Super Pitfall]] || Steve Bjork (SRB Software) for Activision || Tandy/Radio Shack || 1988 || 3 ONLY || 128K || Optional || || Game || DECB || 26-3171 ||
|-
| [[Super Vaders]] || Darrell Ulm || T&D Software || 1985 || 1,2 or 3 || 32K || || Tape || Game || ECB || ||
|-
| [[Symphony12]] || || Speech Systems / Del Software || || || || || || Music || DECB || ||
|-
| [[Syzygy]] || Scott Cabit || Spectral Associates || 1984 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Tanks]] || Larry D. Becker || 80 Micros magazine || August 1982 issue || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, tape or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Temple of ROM]] || Rick Adams || Radio Shack/Tandy || 1982 || 1,2 or 3 || 4K || Required || [[Program Pak]] || Game || CB || 26-3045 ||
|-
| [[Tennis]] || || Radio Shack/Tandy || 1982 || 1,2 or 3 || 4K || 1,2,3, 4K RAM, 1 or 2 joysticks. || [[Program Pak]] || Game || DECB || 26-3080 || RSC-8
|-
| [[Tetra]] || Brian ONeill || Brian ONeill || 1991 || 3 ONLY || 128K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Tetris]] || [[Greg L. Zumwalt]] (Academy Soft-ELORG) || Radio Shack/Tandy || 1987 || 1,2 or 3 || 128K, 16K || 1,2,3 (special features on 3), 16K RAM (128K RAM on Coco 3). || [[Program Pak]] || Game || DECB || 26-3163 ||
|-
| [[The Black Sanctum (graphic version)]] || || Mark Data Products || End of 1983 or beginning of 1984 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[The Crystal City]] || Jeremy Spiller (Gosub Software) || Sundog Systems || Late 1990 || 3 ONLY || 512K || Supported || Disk || Game || DECB || ||
|-
| [[The Factory]] || ??? (Sunburst Communications, game designed by Marge Kosei and Mike Fish) || Tandy Corporation || 1984 || 1,2 or 3 || 32K || || Disk|| Game || DECB || ||
|-
| [[The Force]] || Charles J. Roslund || Anteco Software || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[The Frog]] || A. Hubble || Tom Mix Software || 1983 || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[The Hound of Baskervilles]] || || || || || 4K || || Tape || Education || CB || 26-2551 || RSC-8
|-
| [[The Interbank Incident]] || || Radio Shack/Tandy || 1985 || 1,2 or 3 || 64K || Or mouse || Disk || Game || DECB || ||
|-
| [[The Lair]] || Tom Stephenson and James J. Walton || Freebooter Software || 1985 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[The Microscopic Mission]] || Desing by Robert C. Clardy and Alan H. Zalta; Coco3 version programmed by Mark W. Easter And [[Greg L. Zumwalt]] || Activision/Tandy || 1987 || 3 ONLY || 128K || Optional || Disk || Game || DECB || 26-3271 ||
|-
| [[The Pond]] || Larry Bank (Sunburst Communications, game designed by Eric Grubbs and Mike Fish) || Tandy Corporation || 1984 || 1,2 or 3 || 32K || || Disk|| Game || DECB || ||
|-
| [[The Schoolmaze Adventure]] || || || || || || || || || || ||
|-
| [[The Touchstone]] || ??? || Tom Mix Software || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[The Vortex Factor]] || || Mark Data Products || 1985 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Thermo Patch for TLW-401 Label Maker]] || || Thermo Patch || || || || || || Utility || DECB || ||
|-
| [[Thexder]] || RS-DOS version: C. Daron Stinnett (Synergistic Software), OS-9/NitrOS9 version by Alan Dekok. (Sierra On-Line official software company) || Radio Shack/Tandy || 1988 (RS-DOS cartridge version), 1991(?) (OS-9 disk version) || 3 ONLY || 256K, 128K || 3, (RS-DOS version: 128K RAM, cartridge), (OS-9/NitrOS9 version: 256K RAM, disk). || [[Program Pak]] || Game || DECB || 26-3072 ||
|-
| [[Three In a Row]] || Charles Price || Freeware (released on Compuserve) || 1987 (?) || 3 ONLY || 128K || Optional || Tape, Disk || Game || (D)ECB || ||
|-
| [[Time Bandit]] || Bill Dunlevy and Harry Lafnear || Computer Shack/Michtron || 1983 || 1,2 or 3 || 32K || Optional || Tape, Disk || Game || (D)ECB || ||
|-
| [[Time Fighter]] || Rob Shaw || Mark Data Products || 1983 || 1,2 or 3 || 16K (tape), 32K (disk) || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Time Patrol]] || M.G. Lustig || Computerware || 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[To Preserve Quandic]] || David Karam (Suspense Software) || Prickly-Pear Software || 1984 || 1,2 or 3 || 32K || || Disk || Game || DECB || ||
|-
| [[Tool Kit]] || || Premier Micro Systems || || || || || || Utility || DECB || ||
|-
| [[Tower of Fear]] || Charles Forsythe || Programmers Guild || Late 1981 or early 1982 || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Trailin Tail]] || Mike Hall || Rainbow magazine || August 1983 issue || 1,2 or 3 || 16K || Optional || Tape, Disk || Game || (D)ECB || ||
|-
| [[Trapball]] || ??? || T&D Software, Issue #27 || 198? || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Trapfall]] || Ken Kalish || Tom Mix Software || 1983 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Trekboer]] || || Mark Data Products || Late 1984 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Trickashay]] || David Crandall || AHL Computing || 1983? || 1,2 or 3 || 16K || Supported || Tape, Disk|| Game || DECB || ||
|-
| [[TRS-80 Chemistry Lab, Vol. I]] || || || || || || || || || DECB || 26-2626 ||
|-
| [[TRS-80 Color Forth]] || || Talbot Microsystems || || || || || || Programming || DECB || ||
|-
| [[TRS-80 Color PILOT]] || || || || || || Cassette || || Programming || DECB || 26-2709 ||
|-
| [[TRS-80 Color PILOT]] || || || || || || Disk || || Programming || DECB || 26-2710 ||
|-
| [[Trubble]] || John Demchenko || Freeware || 1990 || 3 ONLY || 128K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Tube Frenzy]] || Dave Edson || Aadvark-80 || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Turret]] || Clayton R. Moore || T&D Software, Issue #78 || December, 1988 issue || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Tutankam]] || Dave Edson || Aadvark-80 || 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Tuts Tomb]] || Rob Shaw and Ron Krebs || Mark Data Products || 1984 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Typemate]] || || || 1988 || || || || || Education || DECB || 26-3155 ||
|-
| [[Typing Tutor]] || || || || || || || || Education || DECB || 26-3152 || RSC-6
|-
| [[Varloc]] || [[Greg L. Zumwalt]] || Radio Shack/Tandy || 1985 || 1,2 or 3 || 64K || 1/2/3, 64K RAM, disk only, joystick. || || Game || DECB || ||
|-
| [[Vegas Gamepak]] || Dan Nelson || Nelson Software Systems || 1981 or 1982 || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[Venturer]] || Dave Edson || Aadvark-80 || 1982 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Video Keno]] || Kevin and Douglas Leany || Tom Mix Software || 1984 || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[Video Pinball]] || ??? || Radio Shack/Tandy || Late 1980 || 1,2 or 3 || 4K || Supported || [[Program Pak]] || Game || CB || ||
|-
| [[Videotex]] || || || 1981 || || || Program Pak || || Communications || ECB || 26-2222 || RSC-6
|-
| [[Viet Cong (V.C.)]] || ??? || Microcomputer Games (division of Avalon Hill Game Company) || 1983 || 1,2 or 3 || 16K || Optional || Tape, Disk || Game || (D)ECB || ||
|-
| [[Viking]] || ??? (Possibly Tim Bremser and Lloyd Pulley?) || Prickly-Pear Software || 1982 || 1,2 or 3 || 16K || || || Tape, Disk || (D)ECB || ||
|-
| [[VIP Terminal]] || || Softlaw || || || || || || Communications || DECB || ||
|-
| [[Vocabulary Tutor 1]] || || || || || || || || Education || DECB || 26-2568 || RSC-8
|-
| [[Vocabulary Tutor 2]] || || || || || || || || Education || DECB || 26-2569 || RSC-8
|-
| [[VoxChess]] || David Crandall || Computerware || 1985 || 1,2 or 3 || 32K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Voyager]] || William Volk || Avalon Hill || Late 1981 (advertised in January, 1982 catalog) || 1,2 or 3 || 16K || || Tape, Disk || Game || (D)ECB || ||
|-
| [[Wacky Food]] || M.G. Lustig || Arcade Animation Inc. || 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[War Kings]] || Charles J. Roslund || Tom Mix Software || early 1982 || 1,2 or 3 || 16K || 2 Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[War Monger]] || Greg Wittmeyer || GSW Software (called A World At War originally), then Sundog Systems (as War Monger) || 1989 (GSW Software, 1991 (Sundog Systems) || 3 ONLY || 128K || Optional || Disk || Game || DECB || ||
|-
| [[Warlords]] || ??? || T&D Software || 1983 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Warp Fighter 3-D]] || Steve Bjork || SRB Software || 1987 || 3 ONLY || 128K || Supported, 3D glasses optional || Disk || Game || DECB || ||
|-
| [[Warrior King]] || Glen R. Dahlgren || Sundog Systems || 1988 || 3 ONLY || 128K || Supported || Disk || Game || DECB || ||
|-
| [[Weirdo]] || Rodger Smith || T&D Software, Issue #58 || May, 1987 issue || 1,2 or 3 || 16K || Supported || Disk, Tape || Game || (D)ECB || ||
|-
| [[Where in the World is Carmen Sandiego?]] || Dane Bigham || Broderbund/Tandy || || 3 ONLY || 128K || Optional || Disk || Education || DECB || 26-3243 ||
|-
| [[Whirlybird Run]] || Brett Norman || Spectral Associates || 1983 (written 1982) || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Wildcatting]] || ??? (The Image Producers) || Radio Shack/Tandy || 1981 || 1,2 or 3 || 16K || Optional || [[Program Pak]] || Game || CB || 26-3067 || RSC-8
|-
| [[WIZ Terminal Program]] || || || || || || || || Communications || DECB || ||
|-
| [[Wizards Den]] || Matt Harper || Novasoft (Tom Mix subsidiary) || 1987 || 1,2 or 3 || 64K || 1,2 or 3 with 64K RAM, disk only, Optional || || Game || DECB || ||
|-
| [[Word-Pak]] || || PBJ || 1983 || || || || || Office || DECB || ||
|-
| [[WordPak II]] || || PBJ || || || || || || Office || DECB || ||
|-
| [[WordPak-RS]] || || PBJ / Radio Shack || || || || || || Office || DECB || ||
|-
| [[Worlds of Flight]] || John Fraysse and Mike Hughey || Tom Mix Software || 1984 || 1,2 or 3 || 32K || 2 Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Wrestle Maniac]] || Kevin Hoare || Diecom Products || 1986 || 1,2 or 3 || 64K || 1/2 Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Xenion]] || Kevin Hoare || Diecom Products || 1987-88 || 1,2 or 3 || 128K || Space shoot'n up game. Author that a separate Coco 1,2/Dragon version was first sent to Diecom, before a Coco 3 version. || || Game || DECB || ||
|-
| [[Yahtzee (80 column version)]] || Jim Peasley (Based on PC version by Patrick Leabo, which was based on early version by JL Helms & MF Pezok, June 1979) || Freeware release (Compuserve) || January 1987 || 3 ONLY || 128K || 3, 128K RAM, cassette or disk,. || || Game || DECB || ||
|-
| [[Z-89]] || Steve Bjork (SRB Software) || Game Point Software, then SRB Software || 1989 || 3 ONLY || 128K || Supported || Disk || Game || DECB || ||
|-
| [[Zaksund]] || Charles J. Roslund || Elite Software || 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || ||
|-
| [[Zaxxon]] || Steve Bjork || Datasoft (on their own, and through Radio Shack) || 1983 || 1,2 or 3 || 32K || Supported || Tape, Disk || Game || (D)ECB || 26-3062 ||
|-
| [[Zenix]] || Jeremy Spiller and Mike Newell || Gosub Software (Eversoft Games), and later Sundog Systems || 1989 || 3 ONLY || 128K || Supported || Disk || OS || DECB || ||
|-
| [[Zone 6]] || Ottmar Bochardt || Colorquest || 1983 || 1,2 or 3 || 16K || Optional || Tape, Disk || Game || (D)ECB || ||
|-
| [[Zonx]] || David Billen || Rainbow magazine || October 1985 || 1,2 or 3 || 16K || Supported || Tape, Disk || Game || (D)ECB || ||
|-)
|}

== More information needed ==
*[[Color It]] - Disk

==CoCo 1/2 Non-games==
*[[Art Gallery]] - Rompack, 26-3061, 1981
*[[Audio Spectrum Analyzer]] - Rompack, 26-3156, 1981
*[[Autoterm 3.2D]] - Disk, PXE Computing
*[[BASIC-09]] - Disk, 26-3036, OS-9
*[[CocoMax Hi-Res Pack]] - Rompack, Colorware
*[[Color File]] - Rompack, 26-3103, 1981
*[[Color File II]] - Rompack, 26-3110, 1986
*[[Color Pack]] - ROM/RAM Pack, Green Mountain Micro
*[[Color Scripsit]] - Rompack, 26-3105, 1981
*[[Color Scripsit II]] - Rompack, 26-3109, 1986
*[[Color Term Plus]] - Rompack, Double Density Software, 1983
*[[Colorcom/E]] - Rompack, Eigen Systems
*[[Lyra]] - Disk, Cassette, Speech Systems, Midi Sequencer for RSDOS
*[[Musica]] 1 & 2, Disk, Cassette, Speech Systems, Wavetable Music composer for RSDOS
*[[Coco Midi]] 1, 2, 3, & Pro - Disk, Rompack, Speech Systems, Midi Recorder for RSDOS
*[[Comm-4 Serial Pak]] - Rompack
*[[Diagnostics]] - Rompack, 26-3019, 1980
*[[Digisector DS-69A]] - Rompack, Microworks
*[[Display 80]] - Rompack, Disto
*[[Disto RAM Pak]] - Rampack, Disto
*[[EDTASM+]] - Rompack, 26-3250, 1982
*[[EPROM Programmer]] - Rompack, Intronics
*[[Graphic Pack]] - Rompack, 26-3157, 1982
*[[Handyman]] - Rompack, 26-3154, 1981
*[[Master Key II]] - Rompack, Computize, 1984
*[[Match Maker Spanish Vocabulary Slills]] - Disk
*[[Micro Painter]] - Rompack, 26-3077, 1982
*[[Microworks Forth]] - Rompack, Microworks
*[[Midi Interface]] - Rompack, Related Research
*[[Modem Pack - Direct Connect]] - Rompack, 26-2228, 1985
*[[Music]] - Rompack, 26-3151, 1980
*[[NewDisk]] - OS-9 Device Driver, 1985
*[[PBJ Dual Serial Port PAk]] - Rompack, PBJ
*[[P-C Pak]] - Rompack, PBJ, 1984
*[[Personal Finance]] - Rompack, 26-3101, 1980
*[[Personal Finance II]] - Rompack, 26-3106, 1983
*[[Real Talker]] - Rompack, Colorware
*[[RS 232 Program Pack]] - Rompack, 26-2226, 1983
*[[Smartwatch Pack]] - Rompack
*[[Soliddrive RAM Pak]] - RAM pack
*[[Spectaculator]] - Rompack, 26-3104, 1981
*[[Spectrum Voice Pak]] - Rompack, Spectrum Projects
*[[Speech Sound]] - Rompack, 26-3144
*[[Speech Systems large white pack]] - Rompack, Speech Systems, has 2 jacks on one side
*[[Speech Systems small black pack]] - Rompack, Speech Systems, no jacks
*[[Stereo Composer]] - Rompack, Speech Systems
*[[Stereo Music - Orch 90CC]] - Rompack, 26-3143, 1984
*[[Typemate]] - Rompack, 26-3155, 1988
*[[Typing Tutor]] - Rompack, 26-3152, 1980
*[[Video Digitizer DS69]] - Rompack
*[[Videotex]] - Rompack, 26-2222, 1981
*[[Voice, The]] - Rompack, Speech Systems
*[[Wildcatting]] - Rompack, 26-3067, 1981
*[[Word-Pak]] - Rompack, PBJ, 1983
*[[WordPak II]] - Rompack, PBJ
*[[WordPak RS]] - Rompack, Radio Shack
*[[X-pad]] - Rompack, 26-1196, 1982, comes with tablet, pen and template
*[[Z80]] - Rompack

==CoCo 3 Games==
(Sorted)
*[[Arena of Skill]] - Disk, Chuck Nivison 1988, 128k, D&D/Arcade/Strategy
*[[Barbarian Quest]] - Disk, Sportsware, 1990, Arcade, Medievel Sword Fighting. 512k Author Paul L Olmstead
*[[Bash]] - Disk, SRB Software 1989, Arkanoid(Bustout) Clone, 128k Ram. Author Steve Bkork
*[[Blox]] - Disk, Chet Simpson 1991, Based on Tetris, 1 of Chet's 1st games, 128k Ram
*[[Castle of Tharoggad]] - Rompack, 26-3159, 1988. 128k Ram, Author Scott cabit?
*[[C-Hawk Football]] - Stephen Macri 1986, 128k, Text/Graphics Football Simulation
*[[Cosmic Ambush]] - Disk, Nick Marentas 1992, Space Shooter, 128k Ram.
*[[Croid]] - Disk, Andrew Simpson 198#, Mind Strategy, 128k ram, Joystick
*[[Crystal City]] - Disk,Arcade, Gosub Software and later on Sundog Systems, 1991. 512k Ram, Lone Ship fighting to save your home planet. Author Jeremy Spiller...
*[[Championship Football]] - Rompack, 26-3172, 1988. 128k Ram
*[[Digger]] - Disk, Chet Simpson 1990-91, Lode Runner clone, 128k Ram, This game had no sound and was Chet's 1st game he ever did and released.
*[[Digger II, Return of the Saint]] - Disk, Chet Simpson 200#, Best Lode Runner Clone, 512k Ram.
*[[Digger Xmas Edition 2019]] - Disk, Chet Simpson, Better and more improved Lode Runner clone with Amiga style graphics and sounds, 512k ram.
*[[Donkey Kong]] - Disk, SockMaster, 200#, Actual Z80 Arcade Game ported to the Coco 3. 512k Ram.
*[[Donut Dilemma3]] - Disk, Nick Marentas, 2020, 128k Ram, Modified to use Joystick and some Levels are optimised, Also it has been re-coded too use Coco 3 Gime 128x192x4 colour mode and Border is now Black!!
*[[Draw Poker]] - Disk, Mike Burton 1986, 128k, Draw poker Card simulation
*[[Exeter]] - Disk, G J Doak, 1987, Graphics Adventure. 128k Ram
*[[Fruit Multi-bars Slot machine]], Tom Mix Software 1986(white Cloud Software), 128k, Slot Machine Simulation
*[[Fire One]] - Disk, Ark Royal Games 1987, 3d Submarine war simulation, 128k Ram.
*[[Frogday Afternoon]] - Disk, Kevin Humphrey, 1988, Control a Scuba Diver Fishing. 128k Ram
*[[Gate Crasher]] - Disk, Nick Marentas 1999, 1st Full 3D shooter, 512k Ram.
*[[Gems]] - Disk, John R Strong 1991, Tetris Clone, 128k Ram, This uses the Orch 90cc Rompack.
*[[Gold Runner 2000]] - Disk, Chet Simpson 1999, Best Lode runner Clone for the Coco's, 512k Ram
*[[Gantelet2]] - Disk or Tape, Diecom Products, 1987. 128k Ram, only game for the coco 3 that allowed up too 4 players at once 2 on joysticks, 2 on Keyboards
*[[Grandprix Challenge]] - Disk or Tape, Diecom Products Inc, 1987. 128k Ram
*[[Gunstar]] - Disk, 6309 Cpu Only, Nick marentas 2020 512k Ram, You are Earths only Hope flying Solo to fight the invaders at their home planet, World Premier was on CocoTalk Mar2020
*[[Iron Forest]] - Disk, Diecom 1988, 1 of only 2 that used the Sega Phaser gun. 128k Ram.
*[[Jeweled]] - Disk, Roger Taylor 2008, Bejeweled Clone, 512k Ram. Background Music and smooth joystick positioning.
*[[Kyum Gai to be ninja]] - Disk, Sundog Systems, 1989, Side Software scrolling Ninja Fighting Game. 128k Ram, Author Glen Dalhgren...
*[[La Belle Lucie Solitaire]] - Disk, EverSoft Games 1990, Card Game, 128k Ram.
*[[Lunar Lander]] - Disk, Jeff Donze Rainbow Magazine 1989, Simulation of landing a Space Capsule on the Moon
*[[Mary's Butterflies]] - Disk, Roger Taylor 200#, Unique game style, 128k Ram.
*[[Malcom Mortar]] - Rompack, 26-3160, 1987. 128k Ram, Author Greg Zumwalt
*[[Marty's Nightmare]] - Disk, SRB Software 19##, Pac Man Style game, 128k Ram. Author Steve Bjork, loosely based on Pac-man type visuals and game play.
*[[Magic of Zanth]] - Disk, Computerware 1987, Graphics Adventure, 128k Ram. Author Scott Cabit?
*[[Medievel Madness]] - Disk, Diecom 1989, 2nd game to use the Sega Phaser gun. 128k Ram.
*[[Mine Rescue]] - Disk, SRB Software 1988, Rescue trapped miners, 128k Ram. Uses the same game system used in Super pitfall, Author Steve Bjork
*[[MindRoll]] - Rompack 128k Ram, Tandy/Radio Shack 1989, Author of coco version Jesse Taylor, Keyboard or Joystick(optional)
*[[Moon Defense]] - Disk, Robert Evans 1987, 128k, Simple Space Fighting game
*[[Neutroid 2.015]] - Disk, Nick Marentas 2015, 128k Ram, Arcade/Strategy when run on a Coco 3 it uses 128k Ram, on other systems it would be 64k?
*[[Nuke the Love Boat]] - Disk, 128k, Computerware 1987, Graphics Adventure, Stop a Terrorist plan to Nuke a Luxury Cruise Ship
*[[Overlord]] - Disk, Oblique Triad, 1990, Wargames Role player game. 128k
*[[Pac Dude]] - Disk, Brian O'Neill 1990, Clone of Pac Man. 128k Ram.
*[[PacDude Monster Maze]] - Disk, Brian O'Neill 1992, Music by Chris Spry. 512k Ram. 1 of the best Hybrid pac-man clones on the coco 3 based on Pac mania for the Amiga
*[[Pac Man]] - Disk, Nick Marentas 1997, Best Pac Man Clone ever on the coco's, 512k Ram.
*[[Pelieti]] - Disk, Roger Taylor 1991, Maze style solving, 128k Ram.
*[[Photon]] - Disk, Sundog Systems, 19##, Arcade Mind Strategy game. 128k Ram. Game Author Jeff Steidle.
*[[Picture Puzzler]] - Disk, Jr&Jr Software, strategy mind game, 128k Ram, 19##
*[[Ponk]] - Disk, Greg Helton 1987, Based on the 1970's Squash Simulation
*[[Popstar Pilot]] - Disk, Nick Marentas 2016, Side Scrolling 80 Screens worth of Arcade quality Shoot them up, 512k Also This is a game that looks NES or Sega like in visuals and game play in my eyes.
*[[Predator]] - Rompack, 26-3165, 1989. 128k Ram, Coco 3 version by Greg Zumwalt
*[[Pursuit]] - Disk/Tape, Tandy Australia Craig Stewart, 1987. 128k Ram
*[[Pyramix]] - Disk, Dr Prebbles programs, 1987. 128k Ram
*[[RAD Warrior]] - Rompack, 26-3162 Jesse taylor for Epyx, 1987. 128k Ram, I find it too be one of the best Ports Jesse did for the coco.
*[[Rampage]] - Tandy/Radio Shack Rompack, 26-3174, 1989. 128k Ram, Author Steve Bjork.
*[[Return of Juniors Revenge]] - Disk, ComputerWare BJ Chambless 1986, Based on Donkey Kong Jr, 128k Ram.
*[[Revenge of the Mutant Miners]] - Disk, Jr&Jr Software, 198#, 128k ram, Based on 2049 miner found on other 8 bit systems
*[[Roller Controller]] - Disk, Spectral Associates 1986, Game theme unknown, 128k Ram.
*[[Robocop]] - Rompack, 26-3164, 1988. 128k Ram, Coco 3 Author Greg Zumwalt
*[[Rupert Rythym]] - Disk or Tape,Nick Marentas (Tandy Australia), 1988. 128k Ram
*[[Slots and Cards]] - Disk, Microdeal, 19##, Vegas slot cards. 128k Ram
*[[Sidney, The Super Space Snake]] - Disk, KLG Systems, 1991, 128k Ram
*[[Seventh Link]] - Disk, Oblique Triad, 1990,RPG Graphics Adventure. based on the Ultima style games
*[[Shanghai]] - Rompack, 26-3084, 1987. 128k Ram, Author Rick Adams certain joystick position on main screen activates alternate color scheme.
*[[Silpheed]] - Rompack, 26-3054, 1988. 128k Ram
*[[Sinnstaar]] - Disk, Sundog Systems, 1989, Space Shoot'n up Game. 512k Ram, Dave Dies under the Phantasm Software banner
*[[Soviet Bloc]] - Disk, John R Strong 1991, Tetris Clone, 128 Ram, Also uses Orch-90cc Rompack.
*[[Space Intruders]] - Disk, Tandy Australia, 1988. 128k Ram, Based on Space Invaders and best Clone to date on any 8bit system, Author Nick Marentas..
*[[Space Marauder]] - Disk, Tandy Australia Craig Stewart, 1987. 128k Ram
*[[Spider Hype and Spider Hyper]] - Disk, Roger Taylor 1992, Trap Spiders in Bottom Half, 128k Ram. 2 versions are made 1 uses 6809 the other uses 6309 chips.
*[[Springster]] - Rompack, 26-3078, Spectral Associates 1987. 128k Ram
*[[Super Pitfall]] - Rompack, 26-3171, 1988. 128k Ram
*[[Super Pitfall 6309 Optimised ]] - hacker Author Unknown, Disk, Game Author SRB(Steve Bjork 1988) RomPack Version, 512k Ram
*[[Super Mastermind]] - Disk, Bill Nobel and Darryl Hildebrandt 1987, Simulation
*[[Sweep]] - Disk, Tim Franklin 2011, 128k, Puzzle game based on Mine Sweeper
*[[The Power Stones of Ard 1]] -Disk, 3 C's Projects, 1988-1989, Graphics Adventure, 128k Ram
*[[The Power Stones of Ard 2]] - Disk, 3 C's Projects, 1990, Graphic adventure, 128k Ram
*[[Those Darn Marbles]] - Disk, Oblique Triad, 1990, based on marble maze. 512k Ram
*[[The Quest for Thelda]] - Disk, Sundog Systems, 1991, Clone of Zelda. 128k Ram
*[[The Quest For The Starlord]] - Disk, Sundog Systems, 198#, graphic adventure, Futuristic Apocalypse game. 128k Ram
*[[The Contras]] - Disk, Sundog Systems, 1991, Commando Clone. 512k Ram
*[[Thexder]] - Rompack, 26-3072, 1987. 128k Ram
*[[Three in a Row]] - Charles Price 198#, Tic Tac Toe simulation 128k Disk
*[[Trubble]] - John Demchenko, Disk 128k, Game theme Unknown?
*[[Tetra]] - Disk, Brian O'Neill 1991, Based on the game Tetris, 128k Ram.
*[[Vegas Slots]] - Disk, Tom Mix Software, 1987. 128k Ram
*[[Video Cards/Keno]] - Disk, Tom Mix, 1988, Vegas Casino Game. 128k
*[[WaterFall]] - Disk, Nick marentas 2019, Arcade. Based on Man Goes Down on Atari VCS, This version is for all 3 coco's 1,2 and 3
*[[Warp Fighter 3-D]] - Disk, Steve Bjork's 3-D space shooter, also can use 3D Glasses. 128k Ram
*[[Warrior King]] - Disk, Sundog Systems, 1988, Medievel Sword game. 128k Ram
*[[WarMongar]] - Disk, Sundog Systems, 1991, World Domination style Game, The Author of the game, Greg Wittmeyer(GSW Software). 128k Ram
*[[Wildwest]] - Disk, Tom Mix 1987, Graphics Adventure, 128k Ram.
*[[World At War]] - Disk, GSW Software, This game was revised, And then Sold By Sundog Systems, Which is the game renamed WarMongar, But with some enhancements. 128k Ram

*[[Z-89]] - Disk, Game Point Software, 1989, Sequel to Zaxxon(utilising the power of the coco 3) 128K Ram. Steve Bjork
*[[Zenix]] - Disk, Jeremy Spiller, 1990, clone of Galaga. 128k Ram, Background music and 32 game levels and level 33 is the alien hordes Home Planet....

OS-9 Level 2 or Nitros-9 Based Games

*[[Kings Quest 3]] - Disk Os-9 Lv2 512k Sierra On-Line for Tandy Usa, 512k Graphics adventure
*[[Koronis Rift]], Disk OS-9 Lv2, Ken Rogoway (Lucasfilm Ltd., for Epyx), 1987, Arcade/Strategy as of
*[[Kyum Gai]] - Disk, Sundog Systems, 1991, OS9 version of To be ninja. 256k or 512k needed
*[[Leisure suit Larry]] - Chris Iden (Coco/OS-9 conversion) Sierra On-Line 1988, 256 or 512k, Graphics/Adventure
*[[Rescue on Fractulas]] - Ken Rogoway (Lucasfilm Ltd., for Epyx), 128k Disk, Rescue Stranded people while being fired upon. Curtis Boyle has done a 6309 updated version with much quicker frame rate in the YR2020
*[[Rogue]] - Disk, 26-3297, 198?. 128k Ram Minimum 512k Ram needed for Ascii graphics
*[[Shanghai]] Rick Adams (Activision) (cartridge original), and Bill Nobel/Alan Dekok (OS-9 version) 256/512k Disk
*[[Sub Battle Simulator]] - Disk, Jesse Taylor & Mike Leber for Epyx, 1987, 128k
2 other games to be entered in here yet will do when time permits :)

==CoCo 3 Non-games==
*[[512K SIMM Upgrade]] - Disk, Cloud-9
*[[ADOS-3]] - Disk, SpectroSystems
*[[Coco3 Utilities]] - Disk, Color Venture
*[[CocoMax III]] - Disk, Colorware
*[[Color Computer Artist]] - Disk, 26-3277
*[[512k Basic]] - Disk, Microcom Software, 1988.
*[[WPShel]] - Disk, OS9 Word Processing shell, Colorsystems, 1990.
*[[Disk Defeater]] - Disk, Rsdos, Break any copy protection used,Carl England, 1995
*[[Backup Magic]] - Disk, Rsdos, Backup any copy protected coco disk on the Market, And can make a emulator running version for DK's and Mess. Carl England, 2005
*[[SuperDisk]] - Disk, Rsdos, Sportsware, 198# Look at How programmers create their own copy protection schemes, Even learn to make your own.
*[[CoCo Family Recorder]] - Disk, requires 80 column monitor and two disc drives. Geneaology database program. Versions for SECB (RS-DOS) and OS-9 were available. FARNA Systems, 1992 - OS-9 version 1995.
*[[Ultilmuse III]] - Disk, Os-9 Level 2 MIDI Sequencer by Michael J.Knudsen.

==CoCo 1/2 Operating Systems==
*[[OS-9 Level One]] - multitasking in a single 64K address space.
*[[Flex]] - single tasking OS whose command prompt got Hayes modems' attention.
*[[ADOS]] - single tasking OS edition enhancements, Slow & Fast compatible with disk and printers

==CoCo 3 Operating Systems==
*[[OS-9 Level Two]] - multitasking with memory mapping and windowing.
*[[NitrOS-9]] - A supercharged, open source version of OS-9 for the CoCo

==Links==
* [http://www.lcurtisboyle.com/nitros9/coco_game_list.html lcurtisboyle list]
* [ftp://maltedmedia.com/coco/SOFTWARE/Games%20COCO%20Info%20Curtis%20Boyle%20Make%20By%20Luis%20Fernandez.xls in Excel]
* [http://aaronwolfe.com/robert.gault/Coco/Unpublished/CART2RAM.html Transferring Coco Pak Software to Disk by Robert Gault]

== Sources ==

* [http://www.lcurtisboyle.com/nitros9/coco_game_list.html L. Curtis Boyle CoCo games list] used with permission - special thanks to L. Curtis Boyle for this list and reviews
* [http://www.icepeople.net/coco/reviews.html The Color Computer games review page]
* Radio Shack paper catalogs - all available at https://www.radioshackcatalogs.com

{{CatSoftware}}

Color Computer 1

2022-11-07T21:53:08Z

MagicFab: Added 16K upgrade ref.

== Color Computer 1 (1980-1983) ==

[[File:Coco1.jpg|thumb|Color Computer 1]]

'''TRS-80 Color Computer from 1980'''

The Radio Shack TRS-80 Color Computer was originally made available in 1980. A number of peripherals were available: tape cassette storage, serial printers, a 5.25 inch floppy disk drive, a pen and graphics tablet called the "X-Pad", speech and sound generators, and joysticks.

== 4K (26-3001/263-3001), 16K (26-3002, 26-3002A, 26-3004, 26-3004A), or 32K (26-3003) ==

Versions with at least 16K of memory installed shipped with standard Microsoft Color Basic or (optionally) Extended Color Basic. It used a regular TV for display, and TV-out was the only available connection to a display device. A 16K upgrade was available as catalog no. 26-3015.

The early versions of the CoCo 1 had a black keyboard surround, the TRS-80 nameplate above the keyboard to the left side, and a RAM badge ("button") affixed on the top and right side of the case. Later versions removed the black keyboard surround and RAM button, and moved the TRS-80 nameplate to the mid-line of the case.

Model 26-3004 has been found in both PAL and NTSC configurations, 26-3004A being distributed in Canada.

Model 26-3002A was added after a report from a new owner getting it in France, so possibly distributed in France.

Initial versions of the CoCo were upgraded to 32K by means of piggybacking two banks of 16K memory chips and adding a few jumper wires. A later motherboard revision removed the 4K RAM option and were upgraded to 32K with "half-bad" 64K memory chips as a cost-cutting measure. These boards have jumpers marked HIGH/LOW to determine which half of the memory chip was good. This was transparent to the BASIC programmer since in either configuration 32K of memory was available.

As memory production yields improved and costs went down, many (perhaps most) 32K CoCo 1s were shipped with perfectly good 64K memory chips; many utilities and programs began to take advantage of the "hidden" 32K.

Eventually the 32K memory option was dropped entirely and only 16K or 64K versions were offered. All versions that shipped with standard Color BASIC could be upgraded to Extended BASIC by simply plugging a ROM into an empty socket provided on the motherboard.

== 64K (26-3003B) White case CoCo 1 and TDP 100 ==

Toward the end of the CoCo 1 production run, some models shipped in a white case with a modified keyboard, often referred to as the "melted" keyboard, which had bigger keycaps but a similar rubbery feel. At about the same time, another white-cased "CoCo", the TDP-100, was marketed through Tandy Data Products (TDP) and sold through a different distribution channel. Except for the nameplate and case, the TDP-100 was completely identical to the CoCo 1. The TDP-100 had ventilation slots that ran the entire length of the case, rather than only on the sides. This ventilation scheme was carried over to the CoCo 2.

[[File:TDP-100.jpg|thumb|Tandy Data Products TDP-100 (64K badge was added by user) ]]

== References ==

* [http://en.wikipedia.org/wiki/TRS-80_Color_Computer#Color_Computer_1_.281980.E2.80.931983.29/ TRS-80 Color Computer] @ Wikipedia
* [http://www.tandycoco.com/coco1.shtml Color Computer 1] @ TandyCoCo.com

[[Category:Hardware]]

Color Computer 1

2022-11-07T21:51:55Z

MagicFab: /* 4K (26-3001), 16K (26-3002, 26-3002A, 26-3004, 26-3004A), or 32K (26-3003) */

== Color Computer 1 (1980-1983) ==

[[File:Coco1.jpg|thumb|Color Computer 1]]

'''TRS-80 Color Computer from 1980'''

The Radio Shack TRS-80 Color Computer was originally made available in 1980. A number of peripherals were available: tape cassette storage, serial printers, a 5.25 inch floppy disk drive, a pen and graphics tablet called the "X-Pad", speech and sound generators, and joysticks.

== 4K (26-3001/263-3001), 16K (26-3002, 26-3002A, 26-3004, 26-3004A), or 32K (26-3003) ==

Versions with at least 16K of memory installed shipped with standard Microsoft Color Basic or (optionally) Extended Color Basic. It used a regular TV for display, and TV-out was the only available connection to a display device.

The early versions of the CoCo 1 had a black keyboard surround, the TRS-80 nameplate above the keyboard to the left side, and a RAM badge ("button") affixed on the top and right side of the case. Later versions removed the black keyboard surround and RAM button, and moved the TRS-80 nameplate to the mid-line of the case.

Model 26-3004 has been found in both PAL and NTSC configurations, 26-3004A being distributed in Canada.

Model 26-3002A was added after a report from a new owner getting it in France, so possibly distributed in France.

Initial versions of the CoCo were upgraded to 32K by means of piggybacking two banks of 16K memory chips and adding a few jumper wires. A later motherboard revision removed the 4K RAM option and were upgraded to 32K with "half-bad" 64K memory chips as a cost-cutting measure. These boards have jumpers marked HIGH/LOW to determine which half of the memory chip was good. This was transparent to the BASIC programmer since in either configuration 32K of memory was available.

As memory production yields improved and costs went down, many (perhaps most) 32K CoCo 1s were shipped with perfectly good 64K memory chips; many utilities and programs began to take advantage of the "hidden" 32K.

Eventually the 32K memory option was dropped entirely and only 16K or 64K versions were offered. All versions that shipped with standard Color BASIC could be upgraded to Extended BASIC by simply plugging a ROM into an empty socket provided on the motherboard.

== 64K (26-3003B) White case CoCo 1 and TDP 100 ==

Toward the end of the CoCo 1 production run, some models shipped in a white case with a modified keyboard, often referred to as the "melted" keyboard, which had bigger keycaps but a similar rubbery feel. At about the same time, another white-cased "CoCo", the TDP-100, was marketed through Tandy Data Products (TDP) and sold through a different distribution channel. Except for the nameplate and case, the TDP-100 was completely identical to the CoCo 1. The TDP-100 had ventilation slots that ran the entire length of the case, rather than only on the sides. This ventilation scheme was carried over to the CoCo 2.

[[File:TDP-100.jpg|thumb|Tandy Data Products TDP-100 (64K badge was added by user) ]]

== References ==

* [http://en.wikipedia.org/wiki/TRS-80_Color_Computer#Color_Computer_1_.281980.E2.80.931983.29/ TRS-80 Color Computer] @ Wikipedia
* [http://www.tandycoco.com/coco1.shtml Color Computer 1] @ TandyCoCo.com

[[Category:Hardware]]

Internet Resources

2022-09-19T12:30:01Z

MagicFab: /* Web Forums/Message Boards */ Added forums

{{NavInternetResources}}

== Web sites ==

* See [[CoCo_Links]]

== Buy & sell ==
* A number of [https://www.cocopedia.com/wiki/index.php/Companies companies and individuals] still develop and sell new software and products for the CoCo
* [https://www.facebook.com/groups/199823804132260 CoCo Marketplace] on Facebook
* [https://discord.com/channels/301741082600013824/481172251014725634 #buy-sell-trade channel] on Discord
* Other websites - search for TRS80, Tandy and Radio Shack on these for better results
** [https://ebay.com eBay]
** [https://www.facebook.com/marketplace/ Facebook marketplace]
** Local online classified ads (eg. [https://kijiji.ca Kijiji] in Canada)

== Web Forums/Message Boards ==
* [https://www.facebook.com/groups/2359462640 TRS-80 Color Computer (CoCo)] group on Facebook - English, US-centric
* [https://www.facebook.com/groups/cococanada Ordinateur Couleur TRS-80 Colour Computer (CoCo) Canada] group on Facebook - English / French, for Canada
* [https://www.facebook.com/groups/ClubeColor/ Clube Color] group on Facebook - Brazilian portuguese
* [https://www.facebook.com/groups/1929079184021683/ Tandy Color Computer OS-9 / NITROS-9] group on Facebook
* Roger Taylor message board (still active?)

These forums are dedicated to a wider TRS-80 models audience but still discuss the CoCo :

* [https://forum.vcfed.org/index.php?forums/tandy-radio-shack.58/ Vintage Computer Federation | Tandy / Radio Shack]
* [https://forums.atariage.com/forum/174-tandy-computers/ Atari Age - Classic Computing | Tandy]
* [https://old.reddit.com/r/Tandy/ Reddit | Tandy]

== Chat ==
* [https://discordapp.com/invite/4J5nHXm Tandy Color Computer (CoCo) Discord Chat] - age verification required
* [https://matrix.to/#/#retrobytes:matrix.org RetroBytes CoCo community on Matrix] - Spanish, French and English channels
* #coco_chat IRC channel on [https://web.libera.chat/ Libera.chat]

== E-Mail Mailing Lists==
* [http://five.pairlist.net/mailman/listinfo/coco/ The MaltedMedia mailing list or CoCoList] - You can subscribe by visiting the web page and filling the subscription form.
* The <code>gmane.comp.hardware.tandy.coco</code> newsgroup on the <code>news.gmane.io</code> NNTP server - a mail-to-news gateway for the MaltedMedia mailing list, accessible through NNTP client software such as [https://www.thunderbird.net Thunderbird]. You can also use this link on some news clients: <code>news://news.gmane.org/gmane.comp.hardware.tandy.coco</code>. ''Note :''
** Postings to the gmane newsgroup are automatically spam-checked.
** Email addresses on the group are also encrypted, so private email may only be sent by subscribers and email addresses will not be harvested.

== FTP File Archives ==
*[ftp://os9archive.rtsi.com/ The OS-9 and CoCo file archive at RTSI.com]
*[ftp://maltedmedia.com/coco/ FTP site associated with the Maltedmedia CoCo mail list, run by Dennis Kitsz]

== Archived resources ==
*[[Delphi Online Service]]

*[[GEnie Online Service]]

[[Category:Internet Resources]]

Color Computer 2

2022-09-07T00:36:53Z

MagicFab: /* ROM upgrade */

[[File:Coco2.Gif|thumb|Color computer 2]]

= Models =

The CoCo2 was first released in September of 1983.

* CB = Color Basic
* ECB = Extended Color Basic

== 26-3026, 26-3026A, 26-3026B model (16K CB ) - September 1983 ==
The first CoCo 2 model released included 16K RAM with standard Color BASIC and was listed in Radio Shack catalogs at U$239.95. The case was a bit smaller than the original CoCo, very similar to the TDP-100. The keyboard was much better than the original CoCo "chicklet" keyboard. They were lower profile than typical modern PC keyboards and the keys were recessed in the center, giving them a "melted" look - a term now used to describe this model.

The circuit boards were revised to be a bit smaller than previous models and were equipped to run a full 64K. Most of its chips are socketed. This machine is based on the #8709416 PC board, and has a large, upright RF modulator with integrated TV channel 3/4 switch.

Also characteristic of this machine is the use of a large power supply pass transistor (in a TO-3 package). The two 24-pin ROM sockets are located near the cartridge/system bus connector, and the eight RAM chips are located in a single row under the keyboard.

This same model number has reportedly been found on larger, Korean-made CoCo models in Australia.

There are two possible versions (and 'A' and 'B') for this catalog number.

== 26-3027 (16K ECB), 26-3003 (64K ECB) ==
This 16K ECB model was listed for $319.95, $399.95 for 64K. A 64K RAM upgrade (26-3017/26-3017B) was "only" $149, and the Extended BASIC ROM upgrade (26-3018) was $79.95, making the $399.95 26-3003 a relative bargain (add the ROM and RAM upgrade to a 16K basic model the total price was $468.90).

The 26-3027 model is identical to the 26-3026, with the exception that it already has the Extended BASIC ROM factory-installed.

There are two possible versions (and 'A' and 'B') for the 26-3027 catalog number.

=== RAM upgrade ===

To upgrade the 26-3026 or 26-3027 to 64 KB of RAM, it is necessary to replace the eight 8040517 chips with 4164 chips of 200 ns or better access time, and to solder a wire between the two pads labelled W1. W1 is located between U6 and U7.

Example documented upgrades :
* [https://www.st-hubert.org/phase2/truepages/elec0006.html 26-3026 model 16K to 64K upgrade]

== 26-3126 (64K, ECB) CoCo 2 kit ==

This particular model was sold as the "Color Computer 2 Kit" in the educational market as a kit of parts to be assembled. It included a booklet with full instructions to assemble the kit into a full CoCo 2 system, including the board and all electronics parts but also power supply, keyboard and complete white plastic case.

* https://www.facebook.com/groups/2359462640/posts/10153646511017641/
* https://www.facebook.com/groups/2359462640/posts/10159470040357641/

== 26-3127 (64K, ECB), 26-3127B ==

This is the first '64K Color Computer 2'. It also featured the 'enhanced' keyboard, otherwise, it is identical to the 26-3026/26-3027.

=== RAM replacement ===

Note that the RAM is soldered in place in those machines which were factory-equipped with 64K, making replacement thereof a bit more difficult if necessary. For this reason, the 26-3026 and 26-3027 variants are favorites among CoCo 2 enthusiasts.

== The Korean-made CoCo 2s ==

=== 26-3134 (16K CB), 26-3136 (16K ECB) ===

The 26-3134 model is the first Korean-made 16K Color BASIC CoCo 2. It uses the #20261043 circuit board, which differs considerably from that used in the earlier USA-made models. Virtually every component on the board has been relocated. The RF modulator is now a smaller unit, lying flat on the board rather than standing upright, and the channel 3/4 switch has been moved to the main board from the modulator. The positions of the various switches and connectors on the PC board (and therefore on the rear panel) differ from those of the previous machines as well. The RAM chips are located in two rows (one of five and one of three chips).

This machine has a metal 'cage' surrounding the power transformer, which was not present in previous models. The power supply utilizes a cooler-running pass transistor (in a TO-220 package). The RF modulator, power transformer, pass transistor, and switch/jack location characteristics of this machine persist on all subsequent models. Most chips are soldered in place on this and all subsequent boards as well.

The 26-3136 model is identical to the 26-3134, but with the Extended BASIC ROM factory-installed.

=== 26-3134A (16K CB 1.3), 26-3136A (16K ECB) ===

The 26-3134A model is the next Korean 16K Color BASIC CoCo 2. It utilizes a #20261044 circuit board, which differs considerably from the previous versions.

The 26-3136A model is the 16K Extended BASIC version of the 26-3134A.

==== ROM upgrade ====
The 26-3134A and 26-3136A models use boards with 28-pin, 16-kilobyte ROMs containing both Color BASIC and Extended BASIC.

28 pin EPROMs are commonly available. When flashing them, the ECB ROM file should be concatenated to the Color BASIC ROM resulting in one single file to be flashed. See [[EPROM Programming]] for an example.

=== 26-3134B (16K CB 1.3), 26-3136B (16K ECB) ===

The 26-3134B model is the last Korean 16K Color BASIC model. It uses the #20261058 circuit board, which is similar to the #20261044 board. It uses two 4416 RAM chips and a 24-pin Color BASIC 1.3 ROM in a 28-pin socket as well. However, in addition to the 4416/4464 sockets and special daughter board connectors, there are pads on the board allowing direct factory installation of eight 4164 chips. This is also the board which contains the newer 6847T1 VDG chip (which is not pin-compatible with the earlier 6847).

The 26-3136B model is the Extended BASIC version of the 26-3134B.

=== 26-3127B (64K ECB ) (some with lowercase support) ===

The last Korean-made model number associated with the 64K ECB CoCo 2, this is an odd one indeed.

Some of the 26-3127B CoCo 2 models are known to have been produced with different Video Display Generator (VDG) chips, either the [[Motorola 6847|Motorola MC6847 or the enhanced MC6847T1]] (marked XC80652P, [https://colorcomputerarchive.com/repo/Documents/Datasheets/MC6847T1%20MOS%20Video%20Display%20Generator%20%28Motorola%29.pdf#page=23 spec sheet]). In comparison, the CoCo3 does not have a real 6847, it has a custom chip (the ACVC) with an internal character generator ROM.

Among these models we find :
* A USA-made TRS-80 with a #20261044 board and a 6847
* A USA-made Tandy with a #20261058 board and a 6847T1
* A Korean-made Tandy with a #20261058 board and a 6847T1.

They were three distinctly different machines, each bearing this same exact 26-3127B model number. This VDG chip is also known as the 6847 or 6847T1, the T1 version would include a lowercase character set.

Contrary to some rumors, the presence of the 'B' in the model number does NOT necessarily indicate the presence of a 6847T1. As noted previously, the Tandy label appears to be the best external indication thereof.

One absolutely accurate method of determining if one is present is to type a '0' (zero) on an operating machine. If the resulting character on the screen is displayed with a slash through it, the machine in question has a 6847T1.

* [https://bigcode.wordpress.com/2020/05/09/tandy-coco-2b-true-lowercase-fonts/ Tandy Coco 2B true lowercase fonts]
* [https://stardot.org.uk/forums/viewtopic.php?f=44&t=22505 6847t1 Font Mystery]
* [https://damieng.com/blog/2016/08/09/typography-in-bits-for-a-few-pixels-more/ Typography in bits: For a few pixels more]
* [http://www.cocovga.com/documentation/system-identification/korean-made-coco-2-identification/ Korean-Made CoCo 2 Identification (either 6847 or 6847T1)]

=== RAM upgrades for Korean models ===

These 64K RAM upgrade notes apply to 26-3134A, 26-3136A, 26-3134B, or 26-3136B models ONLY.

The board's RAM is in the form of two socketed 4416 chips. The preferred 64K upgrade these models involves replacing them with two 4464 chips of 200 ns or better access time and to solder a jumper across the two pads labeled RAM SIZE 64K. The RAM SIZE 64K jumper is located next to IC4.

For the 26-3134A model the option also exists (by means of several special connectors on the board) of a factory upgrade consisting of eight 4164 chips on a daughter board. Legend has it that the option of using either 4164s or 4464s was incorporated for economic reasons (the pricing and availability of RAM were quite unstable when these machines were manufactured). Additionally, this board introduces the use of a single 28-pin ROM socket. A 24-pin ROM containing only Color BASIC 1.3 shipped in that socket in this model. With appropriate jumpering, this socket is able to accept a 27128 EPROM.

= Pricing =
Prices dropped quickly. In mid 1984 RS cut the price for the 16K standard model to $159.95 and the 16K Extended BASIC model to $199.95. Production then shifted from Tandy's US plant to a Korean subcontractor. Those models appeared in mid 1984 at the same prices as the previous models, with new model numbers and revised circuit boards. For Christmas 1984 prices were reduced -- $99.95 for a standard Color BASIC 16K model (31-3134), $139.95 for 16K and Extended Color BASIC (31-3136), and $199.95 with 64K and Extended Color BASIC (31-3127). Prices continued to drop as the home computer market got very competitive and IBM PC clones started coming down in price.

To put these prices in perspective, the new for 1985 Tandy 1000, which was an IBM PC clone (actually an enhanced IBM PC Jr. clone that could be upgraded to standard IBM PC specs) was listed at $1199 with 128K RAM and a single 360K floppy drive. An RF modulator could be purchased ($24.95) to use a standard TV as a display (limited to 40 columns) or a digital $159.95 monochrome/$549.95 color monitor could be used. The CoCo 2 was a relative bargain, although there were a few IBM clones that could be purchased a bit cheaper than the Tandy 1000. In 1987 the Tandy 1000SX was priced at $849 with 384K of RAM and one 360K floppy drive.

The final CoCo2 was listed in the 1987 Tandy catalog for only $99.95 with 64K and Extended Color BASIC.

= Differences =
[http://users.digitalindigo.net/~techno/coco2.html Extracted from]
The CoCo 2, introduced in 1983, is basically a refinement of Radio Shack's original TRS-80 Color Computer. It utilizes a more efficient power supply, higher integration (lower parts count), and a smaller case. The primary goal of these modifications was most likely to lower its manufacturing cost. The only significant functional difference between the two is the absence in the CoCo 2 of a regulated +12VDC power supply. One of the few devices which actually requires this power source is the first-generation floppy disk controller sold for the original CoCo. All subsequent controllers operate exclusively from the +5VDC line.
The CoCo 2 was initially offered with 16 kilobytes of RAM, with the option of upgrading it to 64 kilobytes. Doing so requires considerably less effort than in previous models (typically replacing the RAM chips and soldering one jumper).

While the original CoCo used a keyboard with small, flat, square keys (usually referred to as the 'chicklet' keyboard) and a gray-colored case, the CoCo 2 brought with it a more 'modern' off-white case and a keyboard with 'sculptured' keys. Some describe these early CoCo 2 keyboards as having keys which appear to be 'melted'. The travel distance of said keys is fairly low, as with the chicklet keyboard.

= Upgrading your CoCo 2 =

'''CAUTION! DO NOT ATTEMPT TO UPGRADE ANY CoCo RAM OR ROM WITHOUT FIRST SECURING SPECIFIC UPGRADE INSTRUCTIONS FOR YOUR MACHINE!'''

Please note that improper upgrade attempts have been known to destroy the majority of the chips in a CoCo!

== RAM ==

Note also that the RAM chips used in the 16K CoCo 2 are not the 4116s which one might have expected. The 4116 requires additional power supply voltages not supplied by the CoCo 2. Therefore, a special 16K by 1 bit RAM chip requiring only +5VDC is used. This chip has the Tandy house number 8040517.

The RAM used in most 64K CoCo 2s consists of standard 4164 chips.

CoCo 2 RAM upgrade information may be found below in the sections specific to each 16K CoCo 2 version.

== ROMs ==

Like the original Color Computer, the CoCo 2 has provisions for two ROMs. Each consists (in most cases) of 8 kilobytes of data in a 24-pin ROM chip :

* '''Color BASIC'''
The Color BASIC ROM is present in every CoCo. It contains the minimal BASIC interpreter and necessary routines to drive the machine's keyboard, video circuitry, and I/O ports. Most CoCo 2s use version 1.2 of the Color BASIC ROM (the two ROM versions are independent). A Color BASIC machine displays its Color BASIC version at powerup.

* '''Extended Color BASIC'''
The optional Extended BASIC ROM adds extra graphics commands and other assorted functionality enhancements. Extended Color BASIC (the composite of both ROMs) is also required in order to utilize a floppy disk controller on a CoCo. Extended CoCo 2s use version 1.1 of Extended BASIC (the two ROM versions are independent). An Extended Color BASIC machine displays its Extended BASIC version.

Those machines which shipped without the Extended BASIC ROM could be upgraded (in most cases) simply by plugging the expansion ROM into the appropriate empty socket. The remaining machines shipped with the ROM already in place.

The BASIC command 'EXEC 41175' will display the Color BASIC ROM version in an Extended Color BASIC machine.

== Keyboards ==

Before long, Radio Shack began to offer an additional model of the CoCo 2: one with Extended Color BASIC and 64 kilobytes of RAM already installed. This machine also shipped with a newly-designed keyboard, with greater key travel than either of the previous styles. Every new CoCo 2 began to ship with this new, 'enhanced' keyboard. Note that late-model CoCo 1 chicklet keyboards, all CoCo 2 keyboards, and even CoCo 3 keyboards use the same type of mylar ribbon cables and are interchangeable.

The CoCo 3 keyboard (and some third-party designs) utilize previously-unused positions in the CoCo's keyboard matrix, adding several new keys. Appropriate software can make use of the extra keys on any CoCo model. Note that the style (appearance, key travel, etc.) of the CoCo 3 keyboard is identical to that of the later CoCo 2 keyboard, with the exception of its extra keys.

== Labels as an indication of model differences ==

Radio Shack switched, during the production of the CoCo 2, from the use of the 'TRS-80' label to the 'Tandy' label on its computer products. For this reason, the CoCo 2 can be found with either label. The vast majority of samples seen and possessed by the author display the TRS-80 label. The Tandy label appears to coincide accurately with yet another variation among CoCo 2 models: the presence of the enhanced MC6847T1 VDG (Video Display Generator) chip therein. Every original CoCo and the majority of CoCo 2s (those displaying the TRS-80 label) use the earlier MC6847. As its name implies, the VDG generates the CoCo's video output. The plain 6847 version contains only uppercase characters in its internal character set, whereas the 6847T1 also contains lowercase characters. Note that software and hardware solutions have been created to overcome this limitation of the 6847, without which lowercase characters are displayed as reverse-video uppercase characters. Conversely, while the 6847T1 is capable of generating true hardware-based lowercase, that capability is seldom exploited.

NOTE: Information is still being compiled and confirmed about the various models, particularly those in the A- and B-series. Updates will likely be forthcoming......

= References =

* http://users.digitalindigo.net/techno/coco2.html
* https://web.archive.org/web/20150325023609/www.tandycoco.com/coco2.shtml

[[Category:Hardware]]

EPROM Programming

2022-09-04T04:54:00Z

MagicFab: Added some details about combining ROMs

Programming (or "burning") your own ROMs for upgrade purposes requires specific software, hardware and of course ROM files to be succesful.

This guide was tested and written for Ubuntu 22.04.1 LTS and Debian systems in mind.

== Hardware & software ==

Many EPROM programmers are available and when the CoCo was still available for purchase several magazines published articles to even build your own.

This guide uses the [http://www.autoelectric.cn/en/tl866_main.html USB XGecu programmer (model TL 866II PLUS)], commonly available at an affordable price.

You will also need an EPROM eraser, consisting of a device emitting ultraviolet light to wipe out any data on an EPROM.

== Installing the minipro command line utility ==

We'll be using the [https://gitlab.com/DavidGriffith/minipro/ minipro] command line utility to control this EPROM programmer. Follow the instructions to install it in Ubuntu.

Once installed, you can verify it has the latest firmware :

minipro -t

You may get a warning about outdated firmware like '''Warning : firmware is out of date'''. It's recommended to upgrade the firmware then. Check the relevant section below.

You will then need to decide which kind chip you're going to be flashing and find it in the list of supported ICs.

In this example we'll be using an AM27128ADC EPROM. To find its reference, we search the output of the minipro command :

$ minipro -L AM27128
Found TL866II+ 04.2.128 (0x280)
AM27128A@DIP28
AM27128A@PLCC32

In this case our chip has 28 PIN so the first entry is the one we need to use.

== "Dumping" an EPROM contents to a file ==

To DUMP the content of the above EPROM to a file :

$ minipro -p "AM27128A@DIP28" -r romtest.bin
Found TL866II+ 04.2.128 (0x280)
Chip ID OK: 0x0189
Reading Code... 0.28Sec OK

Then this file can be edited with a hexadecimal editor such as '''tweak'''.

== Flashing a ROM file to an EPROM ==
=== Erasing an EPROM ===

Erasing an EPROM requires an EPROM eraser. This process can take a few minutes. You can dump an EPROM to a file and if such a file contains only "FF" values, it's been erased.

== Writing to an empty EPROM ==

To flash the above EPROM with a file we can use the file we dumped before or we can use an original ROM file from the Coco 1/2, for example Extended Color Basic (ECB) 1.1. As its name indicates, ECB sits "on top" of Color BASIC, so their respective ROM files have to be combined into one.

In this example we'd like to flash ECB 1.3 to the EPROM we have. For this we need to get the Color BASIC 1.3 ROM and the Extended Color BASIC 1.1 ROMs and combine them. Such ROMs can be obtained from [https://colorcomputerarchive.com/repo/ROMs/XRoar/CoCo/BASIC_OS/ the Color Computer Archive] or better yet, they can be [https://github.com/tomctomc/coco_roms compiled from TRS-80 Color Computer ROM source code]. Once you've obtained both ROMs here is an example of steps to burn the resulting ROM :

$ cat extbas11.rom bas13.rom > ECB11_CB13.rom
$ minipro -p AM27128A@DIP28 -w ECB11_CB13.rom
Found TL866II+ 04.2.128 (0x280)

VPP=13V, VDD=6.5V, VCC=5V, Pulse=200us
Chip ID OK: 0x0189
Writing Code... 12.77Sec OK
Reading Code... 0.28Sec OK

=== Firmware upgrade for the TL866 plus ===

You will need to download the original Windows installer (.RAR file similar to xgproV9999_setup.rar) from [http://www.xgecu.com/ the XGecu website] (or [https://github.com/Kreeblah/XGecu_Software from this mirror]), extract it, and the extract the required file before flashing it. Version 11.90 worked in this example :

mkdir XGECUsoftware && cd XGECUsoftware
get https://github.com/Kreeblah/XGecu_Software/blob/master/Xgpro/11/xgproV1190_setup.rar
unrar e xgproV1190_setup.rar
unrar e XgproV1190_Setup.exe updateII.dat

Once you have the updateII.dat file, use it to flash your EPROM programmer :

magicfab@PC-ProDesk:~/Documents/Projets/XGECUsoftware$ minipro -F updateII.dat
Found TL866II+ 04.2.125 (0x27d)
Warning: Firmware is out of date.
Expected 04.2.128 (0x280)
Found 04.2.125 (0x27d)
updateII.dat contains firmware version 4.2.131 (newer)

Do you want to continue with firmware update? y/n:y
Switching to bootloader... OK
Erasing... OK
Reflashing... 100%
Resetting device... OK
Reflash... OK

== References ==

* [http://www.autoelectric.cn/en/tl866_main.html USB XGecu programmer (model TL 866II PLUS)] product page
* [https://github.com/Kreeblah/XGecu_Software XGecu_Software] - A mirror of current and archival versions of software for XGecu's (formerly Autoelectric's) chip programmers
* [https://www.ullright.org/ullWiki/show/eeprom-programmer TL866 Minipro EEPROM Programmer Ubuntu Linux]
* [https://github.com/blurpy/minipro Using minipro in OpenSUSE]

[[Category:Software]]

EPROM Programming

2022-09-04T04:49:15Z

MagicFab: 1st version - final

Programming (or "burning") your own ROMs for upgrade purposes requires specific software, hardware and of course ROM files to be succesful.

This guide was tested and written for Ubuntu 22.04.1 LTS and Debian systems in mind.

== Hardware & software ==

Many EPROM programmers are available and when the CoCo was still available for purchase several magazines published articles to even build your own.

This guide uses the [http://www.autoelectric.cn/en/tl866_main.html USB XGecu programmer (model TL 866II PLUS)], commonly available for an affordable price.

== Installing the minipro command line utility ==

We'll be using the [https://gitlab.com/DavidGriffith/minipro/ minipro] command line utility to control this EPROM programmer. Follow the instructions to install it in Ubuntu.

Once installed, you can verify it has the latest firmware :

minipro -t

You may get a warning about outdated firmware like '''Warning : firmware is out of date'''. It's recommended to upgrade the firmware then. Check the relevant section below.

You will then need to decide which kind chip you're going to be flashing and find it in the list of supported ICs.

In this example we'll be using an AM27128ADC EPROM. To find its reference, we search the output of the minipro command :

$ minipro -L AM27128
Found TL866II+ 04.2.128 (0x280)
AM27128A@DIP28
AM27128A@PLCC32

In this case our chip has 28 PIN so the first entry is the one we need to use.

== "Dumping" an EPROM contents to a file ==

To DUMP the content of the above EPROM to a file :

$ minipro -p "AM27128A@DIP28" -r romtest.bin
Found TL866II+ 04.2.128 (0x280)
Chip ID OK: 0x0189
Reading Code... 0.28Sec OK

Then this file can be edited with a hexadecimal editor such as '''tweak'''.

== Flashing a ROM file to an EPROM ==

To flash the above EPROM with a file we can use the file we dumped before or we can use an original ROM file from the Coco 1/2, for example Extended Color Basic 1.1.

In this example we'd like to flash ECB 1.3 to the EPROM we have. For this we need to get the Color BASIC 1.3 ROM and the Extended Color BASIC 1.1 ROMs and combine them. Such ROMs can be obtained from [https://colorcomputerarchive.com/repo/ROMs/XRoar/CoCo/BASIC_OS/ the Color Computer Archive] or better yet, they can be [https://github.com/tomctomc/coco_roms compiled from TRS-80 Color Computer ROM source code]. Once you've obtained both ROMs here is an example of steps to burn the resulting ROM :

$ cat extbas11.rom bas13.rom > ECB11_CB13.rom
$ minipro -p AM27128A@DIP28 -w ECB11_CB13.rom
Found TL866II+ 04.2.128 (0x280)

VPP=13V, VDD=6.5V, VCC=5V, Pulse=200us
Chip ID OK: 0x0189
Writing Code... 12.77Sec OK
Reading Code... 0.28Sec OK

=== Firmware upgrade for the TL866 plus ===

You will need to download the original Windows installer (.RAR file similar to xgproV9999_setup.rar) from [http://www.xgecu.com/ the XGecu website] (or [https://github.com/Kreeblah/XGecu_Software from this mirror]), extract it, and the extract the required file before flashing it. Version 11.90 worked in this example :

mkdir XGECUsoftware && cd XGECUsoftware
get https://github.com/Kreeblah/XGecu_Software/blob/master/Xgpro/11/xgproV1190_setup.rar
unrar e xgproV1190_setup.rar
unrar e XgproV1190_Setup.exe updateII.dat

Once you have the updateII.dat file, use it to flash your EPROM programmer :

magicfab@PC-ProDesk:~/Documents/Projets/XGECUsoftware$ minipro -F updateII.dat
Found TL866II+ 04.2.125 (0x27d)
Warning: Firmware is out of date.
Expected 04.2.128 (0x280)
Found 04.2.125 (0x27d)
updateII.dat contains firmware version 4.2.131 (newer)

Do you want to continue with firmware update? y/n:y
Switching to bootloader... OK
Erasing... OK
Reflashing... 100%
Resetting device... OK
Reflash... OK

== References ==

* [http://www.autoelectric.cn/en/tl866_main.html USB XGecu programmer (model TL 866II PLUS)] product page
* [https://github.com/Kreeblah/XGecu_Software XGecu_Software] - A mirror of current and archival versions of software for XGecu's (formerly Autoelectric's) chip programmers
* [https://www.ullright.org/ullWiki/show/eeprom-programmer TL866 Minipro EEPROM Programmer Ubuntu Linux]
* [https://github.com/blurpy/minipro Using minipro in OpenSUSE]

[[Category:Software]]

EPROM Programming

2022-09-04T02:23:00Z

MagicFab: 1st version (WIP)

Talk:EPROM Programmer

2022-09-04T00:52:13Z

MagicFab: MagicFab moved page Talk:EPROM Programmer to Talk:EPROM Programming: Re-write

#REDIRECT [[Talk:EPROM Programming]]

Talk:EPROM Programming

2022-09-04T00:52:13Z

MagicFab: MagicFab moved page Talk:EPROM Programmer to Talk:EPROM Programming: Re-write

Should be under hardware I believe

EPROM Programmer

2022-09-04T00:52:13Z

MagicFab: MagicFab moved page EPROM Programmer to EPROM Programming: Re-write

#REDIRECT [[EPROM Programming]]

EPROM Programming

2022-09-04T00:52:13Z

MagicFab: MagicFab moved page EPROM Programmer to EPROM Programming: Re-write

I don't know how many versions were made, but mine runs off a single +5 volt supply. It does not use batteries to get the programming voltage, it uses a DC-to-DC voltage contverter to generate the +12V, +21V, or +25V programming voltage. By using a DC-to-DC converter, it allows it to work on all versions of the coco. This IS compatable with the CoCo3.

repair tip: I had my DC-to-DC converter go bad (I broke it, by overloading it, it was an accident), and I simply tested the 4 transistors and replaced the bad one(s). With the price of these small signal transistors, you're probably better off to just replace all of them.

I will try to get a picture of mine posted before too long. Someone contact me if I forget.

[[Category:Software]]

Upgrading and Restoring the CoCo

2022-09-04T00:50:27Z

MagicFab:

== RAM ==

* [http://www.frontiernet.net/~mmarlette/Cloud-9/Hardware/512K.html TRIAD 512K SRAM Upgrade] for CoCo 3
* [http://tormod.me/mooh.html MOOH - Memory expansion (Program Pak board) for your Dragon or CoCo 1/2] featuring :
** 512 KB RAM, handled by a DAT (dynamic address translator) mostly software compatible with the DAT in the Tandy CoCo
** SPI interface with 4 slaves, one connected to the micro-SD card slot
** ROM socket for 27C512 type EPROMs (64KB)

== Keyboard / Mylar replacement ==

As of Sept. 2022 two people heva made keyboard mylar kits available to replace dead or failing CoCo 1/2 or CoCo 3 keyboards :

* [https://computerconect.com/blogs/news/keyfix-mylar-keyboard-replacement?_pos=2&_sid=5d5ef6012&_ss=r Keyfix - mylar keyboard replacement kit] @ Computer Connect, by Patrick Ulland
* [https://www.facebook.com/groups/2359462640/posts/10160057655892641 CoCo Membrane - mylar keyboard replacement kit] - open hardware (MIT licensed) design by Mike Rojas

== CPU ==

The Hitachi 63B09E is a pin-to-pin direct replacement for the 6809E CPU found in all CoCos.

Virtually all Color Computers have their 6809 CPU soldered to the motherboard. Therefore, desoldering the CPU is necessary, and installing a socket before upgrading is recommended. If you are in doubt as to your ability to accomplish this, then do not attempt the procedure. It is very delicate and can damage your CoCo motherboard if you aren't careful.

Some distributors offer installation service.

* [https://retrorewind.ca/63b09e Hitachi 63b09e replacement CPU] @ RetroRewind
* [http://www.frontiernet.net/~mmarlette/Cloud-9/Hardware/6309.html Hitachi 63x09E replacement CPU] @ Cloud9 Tech
* [http://www.frontiernet.net/~mmarlette/Cloud-9/Hardware/6309.html Pro-Tector+ ] @ Cloud9 Tech - protects your CoCo CPU against jolted multi-paks and cartridges.

== ROM ==

Some CoCo 1/2 models only came with a Color BASIC ROM and can be upgraded to have Extended Color BASIC. Such CoCos have an empty ROM socket for 24-PIN ECB ROMs. You can either burn an EPROM yourself or buy an EPROM online. The easiest is to use a 28-PIN EPROM and a 24-to-28-PIN adapter.

* [https://www.ebay.ca/itm/154766985923 Original 24-PIN Radio Shack ECB 1.1 chip] @ eBay, sold by [https://www.ebay.ca/usr/dr.ians_junque dr.ians_junque]
* [https://thezippsterzone.com/2018/05/07/ecb-modules/ 24-28 PIN adapter module] @ Zippster Zone
* [https://store.go4retro.com/23xx-adapter/ 24-28 PIN adapter module], [https://www.go4retro.com/products/23xx-adapter/ technical documentation] @ Retro Innovations
* [http://www.frontiernet.net/~mmarlette/Cloud-9/Services/index.html EPROM burning service] @ Cloud9 Tech

= References =

Upgrading and Restoring the CoCo

2022-09-04T00:41:43Z

MagicFab: /* RAM */

== RAM ==

* [http://www.frontiernet.net/~mmarlette/Cloud-9/Hardware/512K.html TRIAD 512K SRAM Upgrade] for CoCo 3
* [http://tormod.me/mooh.html MOOH - Memory expansion (Program Pak board) for your Dragon or CoCo 1/2] featuring :
** 512 KB RAM, handled by a DAT (dynamic address translator) mostly software compatible with the DAT in the Tandy CoCo
** SPI interface with 4 slaves, one connected to the micro-SD card slot
** ROM socket for 27C512 type EPROMs (64KB)

== Keyboard / Mylar replacement ==

As of Sept. 2022 two people heva made keyboard mylar kits available to replace dead or failing CoCo 1/2 or CoCo 3 keyboards :

* [https://computerconect.com/blogs/news/keyfix-mylar-keyboard-replacement?_pos=2&_sid=5d5ef6012&_ss=r Keyfix - mylar keyboard replacement kit] @ Computer Connect, by Patrick Ulland
* [https://www.facebook.com/groups/2359462640/posts/10160057655892641 CoCo Membrane - mylar keyboard replacement kit] - open hardware (MIT licensed) design by Mike Rojas

= CPU =

The Hitachi 63B09E is a pin-to-pin direct replacement for the 6809E CPU found in all CoCos.

Virtually all Color Computers have their 6809 CPU soldered to the motherboard. Therefore, desoldering the CPU is necessary, and installing a socket before upgrading is recommended. If you are in doubt as to your ability to accomplish this, then do not attempt the procedure. It is very delicate and can damage your CoCo motherboard if you aren't careful.

Some distributors offer installation service.

* [https://retrorewind.ca/63b09e Hitachi 63b09e replacement CPU] @ RetroRewind
* [http://www.frontiernet.net/~mmarlette/Cloud-9/Hardware/6309.html Hitachi 63x09E replacement CPU] @ Cloud9 Tech
* [http://www.frontiernet.net/~mmarlette/Cloud-9/Hardware/6309.html Pro-Tector+ ] @ Cloud9 Tech - protects your CoCo CPU against jolted multi-paks and cartridges.

= ROM =

Some CoCo 1/2 models only came with a Color BASIC ROM and can be upgraded to have Extended Color BASIC. Such CoCos have an empty ROM socket for 24-PIN ECB ROMs. You can either burn an EPROM yourself or buy an EPROM online. The easiest is to use a 28-PIN EPROM and a 24-to-28-PIN adapter.

* [https://www.ebay.ca/itm/154766985923 Original 24-PIN Radio Shack ECB 1.1 chip] @ eBay, sold by [https://www.ebay.ca/usr/dr.ians_junque dr.ians_junque]
* [https://thezippsterzone.com/2018/05/07/ecb-modules/ 24-28 PIN adapter module] @ Zippster Zone
* [https://store.go4retro.com/23xx-adapter/ 24-28 PIN adapter module], [https://www.go4retro.com/products/23xx-adapter/ technical documentation] @ Retro Innovations
* [http://www.frontiernet.net/~mmarlette/Cloud-9/Services/index.html EPROM burning service] @ Cloud9 Tech

= References =

Upgrading and Restoring the CoCo

2022-09-04T00:40:52Z

MagicFab: First version

= RAM =

* [http://www.frontiernet.net/~mmarlette/Cloud-9/Hardware/512K.html TRIAD 512K SRAM Upgrade] for CoCo 3
* [http://tormod.me/mooh.html MOOH - Memory expansion (Program Pak board) for your Dragon or CoCo 1/2] featuring :
** 512 KB RAM, handled by a DAT (dynamic address translator) mostly software compatible with the DAT in the Tandy CoCo
** SPI interface with 4 slaves, one connected to the micro-SD card slot
** ROM socket for 27C512 type EPROMs (64KB)

== Keyboard / Mylar replacement ==

As of Sept. 2022 two people heva made keyboard mylar kits available to replace dead or failing CoCo 1/2 or CoCo 3 keyboards :

* [https://computerconect.com/blogs/news/keyfix-mylar-keyboard-replacement?_pos=2&_sid=5d5ef6012&_ss=r Keyfix - mylar keyboard replacement kit] @ Computer Connect, by Patrick Ulland
* [https://www.facebook.com/groups/2359462640/posts/10160057655892641/?__cft__[0]=AZXrX6-KxId2x5v_DbOXE84EZmmxzAqknQ5gGYtX3lzJOpU2jtko-bXMCOfyqVBmcjdhOp9Rh5-ItiHxV-enxlAMudQ5416-cSb0Y-9j04rJeKnt7XJPLKOM7LfIC1G9CYAYYUg1JuST9gGhBjSk85AX&__tn__=%2CO%2CP-R CoCo Membrane - mylar keyboard replacement kit] - open hardware (MIT licensed) design by Mike Rojas

= CPU =

The Hitachi 63B09E is a pin-to-pin direct replacement for the 6809E CPU found in all CoCos.

Virtually all Color Computers have their 6809 CPU soldered to the motherboard. Therefore, desoldering the CPU is necessary, and installing a socket before upgrading is recommended. If you are in doubt as to your ability to accomplish this, then do not attempt the procedure. It is very delicate and can damage your CoCo motherboard if you aren't careful.

Some distributors offer installation service.

* [https://retrorewind.ca/63b09e Hitachi 63b09e replacement CPU] @ RetroRewind
* [http://www.frontiernet.net/~mmarlette/Cloud-9/Hardware/6309.html Hitachi 63x09E replacement CPU] @ Cloud9 Tech
* [http://www.frontiernet.net/~mmarlette/Cloud-9/Hardware/6309.html Pro-Tector+ ] @ Cloud9 Tech - protects your CoCo CPU against jolted multi-paks and cartridges.

= ROM =

Some CoCo 1/2 models only came with a Color BASIC ROM and can be upgraded to have Extended Color BASIC. Such CoCos have an empty ROM socket for 24-PIN ECB ROMs. You can either burn an EPROM yourself or buy an EPROM online. The easiest is to use a 28-PIN EPROM and a 24-to-28-PIN adapter.

* [https://www.ebay.ca/itm/154766985923 Original 24-PIN Radio Shack ECB 1.1 chip] @ eBay, sold by [https://www.ebay.ca/usr/dr.ians_junque dr.ians_junque]
* [https://thezippsterzone.com/2018/05/07/ecb-modules/ 24-28 PIN adapter module] @ Zippster Zone
* [https://store.go4retro.com/23xx-adapter/ 24-28 PIN adapter module], [https://www.go4retro.com/products/23xx-adapter/ technical documentation] @ Retro Innovations
* [http://www.frontiernet.net/~mmarlette/Cloud-9/Services/index.html EPROM burning service] @ Cloud9 Tech

= References =

Upgrading and Restoring the CoCo

2022-09-04T00:10:04Z

MagicFab:

Upgrading

2022-09-03T23:57:46Z

MagicFab: MagicFab moved page Upgrading to Upgrading and Restoring the CoCo

#REDIRECT [[Upgrading and Restoring the CoCo]]

Upgrading and Restoring the CoCo

2022-09-03T23:57:46Z

MagicFab: MagicFab moved page Upgrading to Upgrading and Restoring the CoCo

= RAM =

* [http://www.frontiernet.net/~mmarlette/Cloud-9/Hardware/512K.html TRIAD 512K SRAM Upgrade] for CoCo 3

= CPU =

= ROM =

= References =

User:MagicFab

2022-08-31T11:33:43Z

MagicFab: Fixed CoCobyte.co

I am a long-time Color Computer fan from Colombia, interested in rescuing and restoring as many CoCos as I can and putting them in hands of new users. I offer free data recovery services for CoCo users (past and current), including decaying floppies. I am also interested in old Macintosh and Apple II series computers.

My current focus is in buying beat up CoCos and restoring and upgrading them for trading in Quebec province (Canada) and neighboring provinces and states (mostly Ontario, VT and NY). I also improve existing documentation and scan documents for archival. I am learning how to do basic repairs and build cables and other peripherals for re-distribution, mostly in Latin America. I am working on making [[Color Computer User Groups]] a thing again and started a Canadian group in April 2022.

My first computer was a 4K CoCo 1 which I later upgraded to 16K. It came with Bustout, Space Invaders, Personal Finance and Music Program paks. I later got a 64K CoCo 2 with DMP-150, floppy disks, CCR-82. I never owned a CoCo 3 but met friends that did and we would meet to trade software and geek out. Check out my childhood Color Computer user group reboot at https://cocobyte.co !

I live in Montreal (Quebec), Canada but will drive or fly to any dying CoCo :)

== Contact ==

* [https://magicfab.ca MagicFab.ca] - personal site, email contact form, [https://legoutdulibre.com Le Goût du Libre], my consulting work in Free open source software enterprise support and systems administration
* [https://cocobyte.co CoCoByte] - my home country (Colombia) Color Computer user group
* [https://app.element.io/#/group/+retrobytes:matrix.org RetroBytes], CoCo chat rooms in English, French and Spanish on the Matrix network, this is where I hang out

== Books ==

I've started to put together a list of my CoCo books with [https://openlibrary.org/ Open Library] :
* https://openlibrary.org/people/magicfab/lists/OL206510L/MagicFab%27s_TRS-80_Color_Computer_Books

== Hardware ==

My first computer was an original Color Computer with 4K RAM. I then upgraded to CoCo 2. I still own both systems.

I also own a CoCo 3 as a my daily driver and several CoCo 2 and 3 systems rotate in my home lab while awaiting new owners.

=== Rescued CoCos ===

* CoCo 2 64K - rescued from movie props business basement. DOA, re-set chips, worked.
* 2021-01 : CoCo 3 128K - bought from eBay, pending CPU replacement
* CoCo 3 128K - bought from estate liquidation, re-set chips, worked (daily driver)
* CoCo 2 64K - bought from eBay, shipped to Miami, sent to Colombia for repair, keyboard succesfully replaced
* CoCo 2 16K - bought from FB marketplace
* March 2022 - 2 x CoCo 1 (one dead) and 1 x CoCo 3 from Kijiji.ca including a ton of books and accessories
* April 2022
** 1 CoCo 3 with Multipak, FD-502, CM-8 and CoComax interface (Texas, USA). Picked up by a friend, waiting to be shipped
** 2 x CoCo 2 (one dead keyboard) and 1 CoCo 3 (Montreal, CA)

== ToDo ==
* https://www.nf6x.net/2016/09/wanted-radio-shack-color-tvs-for-trs-80-color-computer/ - get picture and add info to Hardware page
* Cleanup software page, ROMpaks list
* Free floppy / tape software transfer service through SDC

Color Computer 1

2022-08-01T14:41:04Z

MagicFab: /* 4K (26-3001), 16K (26-3002, 26-3004, 26-3004A), or 32K (26-3003) */ Added 26-3002A

== Color Computer 1 (1980-1983) ==

[[File:Coco1.jpg|thumb|Color Computer 1]]

'''TRS-80 Color Computer from 1980'''

The Radio Shack TRS-80 Color Computer was originally made available in 1980. A number of peripherals were available: tape cassette storage, serial printers, a 5.25 inch floppy disk drive, a pen and graphics tablet called the "X-Pad", speech and sound generators, and joysticks.

== 4K (26-3001), 16K (26-3002, 26-3002A, 26-3004, 26-3004A), or 32K (26-3003) ==

Versions with at least 16K of memory installed shipped with standard Microsoft Color Basic or (optionally) Extended Color Basic. It used a regular TV for display, and TV-out was the only available connection to a display device.

The early versions of the CoCo 1 had a black keyboard surround, the TRS-80 nameplate above the keyboard to the left side, and a RAM badge ("button") affixed on the top and right side of the case. Later versions removed the black keyboard surround and RAM button, and moved the TRS-80 nameplate to the mid-line of the case.

Model 26-3004 has been found in both PAL and NTSC configurations, 26-3004A being distributed in Canada.

Model 26-3002A was added after a report from a new owner getting it in France, so possibly distributed in France.

Initial versions of the CoCo were upgraded to 32K by means of piggybacking two banks of 16K memory chips and adding a few jumper wires. A later motherboard revision removed the 4K RAM option and were upgraded to 32K with "half-bad" 64K memory chips as a cost-cutting measure. These boards have jumpers marked HIGH/LOW to determine which half of the memory chip was good. This was transparent to the BASIC programmer since in either configuration 32K of memory was available.

As memory production yields improved and costs went down, many (perhaps most) 32K CoCo 1s were shipped with perfectly good 64K memory chips; many utilities and programs began to take advantage of the "hidden" 32K.

Eventually the 32K memory option was dropped entirely and only 16K or 64K versions were offered. All versions that shipped with standard Color BASIC could be upgraded to Extended BASIC by simply plugging a ROM into an empty socket provided on the motherboard.

== 64K (26-3003B) White case CoCo 1 and TDP 100 ==

Toward the end of the CoCo 1 production run, some models shipped in a white case with a modified keyboard, often referred to as the "melted" keyboard, which had bigger keycaps but a similar rubbery feel. At about the same time, another white-cased "CoCo", the TDP-100, was marketed through Tandy Data Products (TDP) and sold through a different distribution channel. Except for the nameplate and case, the TDP-100 was completely identical to the CoCo 1. The TDP-100 had ventilation slots that ran the entire length of the case, rather than only on the sides. This ventilation scheme was carried over to the CoCo 2.

[[File:TDP-100.jpg|thumb|Tandy Data Products TDP-100 (64K badge was added by user) ]]

== References ==

* [http://en.wikipedia.org/wiki/TRS-80_Color_Computer#Color_Computer_1_.281980.E2.80.931983.29/ TRS-80 Color Computer] @ Wikipedia
* [http://www.tandycoco.com/coco1.shtml Color Computer 1] @ TandyCoCo.com

[[Category:Hardware]]

Software

2022-07-30T14:29:05Z

MagicFab: Moved Doctor Who, added Dragon Fire, confirmed Donut Dilema/Gantelet/TheKing/Galagon/Zone 6/Xenion/Applicance and light

{{NavSoftware}}

===SOFTWARE===

'''Note''': The actual sorting process will happen on your computer using client-side JavaScript. For this reason it is only possible to use this functionality if you have JavaScript enabled in your web browser.



{| class="wikitable sortable"
|-
! scope="col" width="18%" | Title
! scope="col" width="6%" | Author
! scope="col" width="6%" | Publisher
! scope="col" width="6%" | Year
! scope="col" width="6%" | CoCo Model
! scope="col" width="6%" | Ram
! scope="col" width="28%" | Observations
! scope="col" width="6%" | Media
! scope="col" width="6%" | Type
! scope="col" width="6%" | OS
! scope="col" width="6%" | Catalog No.
! scope="col" width="6%" | 1st Appearance
|-
| [[20,000 Leagues Under the Sea]] || || || || || || || || Game || DECB || 26-2553 || RSC-8
|-
| [[3-D Brickaway]] || [[Britt Monk]] || [[Britt Monk]] and then [[Avalon Hill]] || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick, tape or disk. || || Game || DECB || ||
|-
| [[3-D Ghostmania]] || [[Randy S. Johnson]] || Educational Arcade Systems || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[7 Card Stud]] || || Intelligent Software / Tandy || 1984 || || || || [[Program Pak]] || Game || DECB || 26-3074 ||
|-
| [[80C Monitor]] || || The Micro Works || || || || || || Game || DECB || ||
|-
| [[8-Ball]] || [[Charles J. Roslund]] and [[B.M. Cook]] || [[Anteco Software]] || 1st half of 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || [[Program Pak]] || Game || DECB || ||
|-
| [[A Mazing World of Malcom Mortar]] || [[Greg L. Zumwalt]] & Mark W. Easter (ZCT Systems Group) for Gamestar || Tandy/Radio Shack || 1987 || 3 ONLY || 128K || 3 ONLY, 128K RAM, joystick optional. || [[Program Pak]] || Game || DECB || 26-3160 ||
|-
| [[Able Builders]] || Terry Steen || T&D Software #52 || October 1986 issue || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Advanced Star Trench Warfare]] || Fred B. Scerbo || Illustrated Memory Banks || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM with Extended BASIC, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Adventure In Mythology]] || Scott Cabit || Saguaro Software || 1986 (programmed in late 1985) || 1,2 or 3 || 64K || 1,2,3, 64K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Adventure in Wonderland]] || Bill Sethares || Prickly Pear Software || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Airline]] || Roger Schrag (original Atari 400/800 version by George Schwenk) || Adventure International || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Alcatraz II]] || Michael (Mike) R. Hughey || Spectral Associates || 1981 or 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, tape or disk, joysticks optional. || || Game || DECB || ||
|-
| [[Alphabet Zoo]] || || || 1983 || || || || [[Program Pak]] || Game || DECB || 26-3170 ||
|-
| [[Android Attack]] || ??? Unknown || Spectral Associates || Early 1982 (original 16K Robot Battle), 1982 (32k speech version) || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM (non-speech) or 32K RAM (speech), tape or disk, joystick. (originally called Robot Battle) || || Game || DECB || ||
|-
| [[Androne]] || Robert Arnstein || Radio Shack || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM. || [[Program Pak]] || Game || DECB || 26-3096 ||
|-
| [[Annihilator]] || Doug Kelley || Chromasette || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Apollo]] || Sylvain Payeur || Sylvain Payeur || 2001 (previously unreleased) - written in 19?? || 1,2 or 3 || 16K || 1/2/3, 16K RAM. || || Game || DECB || ||
|-
| [[Apples]] || Bob Crispen || Computerware (unofficially; see <a href="bob_crispen_approval.txt">Bob Crispens approval email</a> for an explanation) || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick, tape or disk. || || Game || DECB || ||
|-
| [[Appliance and Light]] || || || 1984 || 1,2 || || || || Game || DECB || 26-3142 ||
|-
| [[Arcadia]] || ??? (Flying Flipper Action) || Freeware/Shareware || 198? || 1,2 or 3 || 32K || 1,2,3, 32K RAM Extended BASIC, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Arena of Skill]] || Chuck Nivison || Freeware/Shareware || 1988 || 3 ONLY || 128K || 3, 128K RAM, disk, joystick. || || Game || DECB || ||
|-
| [[Arex]] || Roger Schrag (original TRS-80 Model I/III version by William Muk) || Adventure International || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Arkanoid]] || Steve Bjork || Tandy (Licensed from TAITO America Corp.) || 1989 || 3 ONLY || 128K, 32K || 1 or 2 Version 32k RAM required; Coco 3 version, 128K RAM required, joystick. || [[Program Pak]] || Game || DECB || 26-3043 ||
|-
| [[Art Gallery]] || || Radio Shack/Tandy || || || || || || Game || DECB || 26-3061 || RSC-6
|-
| [[Astro Blast]] || Ron Krebs || Mark Data Products || 1982 || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM (cassette) or 32K RAM (disk), joystick. || || Game || DECB || ||
|-
| [[Astroblast]] || || Dragon Data Ltd || || || || || || Game || DECB || ||
|-
| [[Athletyx]] || Ken Kalish || Microdeal Cornwall (for Dragon-32 and Dragon-64) || 1985 (Programmed in 1984) || 1,2 or 3 || 32K || 1/2/3, 32K RAM, joystick. || || Game || DECB || ||
|-
| [[Atom]] || || Tandy || 1983 || || || || [[Program Pak]] || Game || DECB || 26-3149 ||
|-
| [[Audio Spectrum Analyzer]] || Steve Bjork || Radio Shack (Datasoft) || 1981 || 1 or 2 ONLY || 4K || 1,2, 4K RAM. || [[Program Pak]] || Game || DECB || 26-3156 || RSC-8
|-
| [[Avenger]] || ??? || The Cornsoft Group || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Backgammon]] || || Distributed by Radio Shack || 1980-1981 || 1,2 or 3 || 4K || 1,2,3, 4K RAM. || [[Program Pak]] || Game || CB || 26-3059 || RSC-6
|-
| [[Bagasaurus]] || ??? (Childrens Computer Workshop). There is some comments in the game code: "The Bagasaurus Production Team: David Behrman, Jonathan Cohen, Angela Green, Gavrielle Levine, Jenny Howland, Seth Meyers, Janice Mueller, Barbara Stewart, Jefferson Stonier, Debbie Weinberger." || Tandy Corporation || Late 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk, joystick. || || Game || DECB || ||
|-
| [[Bagitman]] || Mike Roberts || Aardvark || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Balloon Attack]] || Chris Keyes || ??? (T&D Software or Chromasette?) || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Balloon Fire]] || Terry Steen || T&D Software (Issue #27) || 198? || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Bash]] || Steve Bjork || SRB Software and Game Point Software || 1989 || 3 ONLY || 128K, 64K || 1 or 2 with 64K RAM, or Coco 3 with 128K RAM, disk only, joystick. || || Game || DECB || ||
|-
| [[BASIC Aid v 1.2]] || || Eigen Systems || || || || || || Game || DECB || ||
|-
| [[Battle of Gettysburg]] || James Woodruff || Softwride || 1982 || 1,2 or 3 || || Coco 1/2/3?, Joystick, 16 Kb, tape or disk. || Disk/Tape || || || ||
|-
| [[B.C. Bill]] || ??? || Imagine Software (England) || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM || Disk, tape || Game || DECB || ||
|-
| [[Beam]] || ??? || ??? || ???? || 1,2 or 3 || 16K || 1,2,3, 16K RAM || Disk, tape || Game || DECB || ||
|-
| [[Beam Rider]] || ??? (D&D Software) || Spectral Associates || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Bedlam]] || Robert Arnstein || Tandy/Radio Shack || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape only. || || Game || DECB || 26-3312 || RSC-8
|-
| [[Berserk]] || Ron Krebs || Mark Data Products || 1981 || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape, 32K disk, joystick. (changed name to Haywire in late 1982) || || Game || DECB || ||
|-
| [[Beyond the Cimeeon Moon]] || Kevin Herrboldt and Tim Nelson || Nelson Software Systems (later ColorQuest) || 1982 || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM casette, 32K RAM disk. || || Game || DECB || ||
|-
| [[Bingo Math]] || || || || || || || || Game || DECB || 26-3150 || RSC-4
|-
| [[Birds]] || Andrew Hubbell || Tom Mix Software || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick, tape or disk. || || Game || DECB || ||
|-
| [[Blackboard]] || || [[Children's computer workshop]] || 1983 || || || || || Education || || ||
|-
| [[Blackbeards Island]] || Greg Miller, design by Eric Nelson, art by Pamela Dawn Miller || Novasoft (Tom Mix Software subsiduary) || late 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM disk only. || || Game || DECB || ||
|-
| [[Blackjack]] || Doug and Kevin Leany || Tom Mix Software || 1984 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Blackjack Royale]] || J. M. Nowicki || Second City Software || 1988 || 1,2 or 3 || 32K || 1,2,3 (Extended BASIC required), 32K RAM, disk or tape. || || Game || DECB || ||
|-
| [[Blank [[Program Pak]]]] || || || || || || || || Game || DECB || ||
|-
| [[Blochead]] || ??? || Computerware || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Blox]] || Chet Simpson || Hyper Tech Software (Freeware release) || 1991 || 3 ONLY || 128K || 3, 128K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Bouncing Boulders]] || Dave Dies and Roland Knight || Diecom Products || 1986 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Boxshoot]] || A. Pakerski || Chromasette || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joysticks, tape or disk. || || Game || DECB || ||
|-
| [[Biosphere]] || [[Tandy Corp.]] || [[Tandy Corp.]] || 1985 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk. || || Game, Simlation || DECB || 26-3280 ||
|-
| [[Brew Master]] || Rodger Smith || Novasoft (Tom Mix subsiduary) || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Brick Pong]] || A. Pakerski || T&D Software (Issue #10) || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Bridge Tutor]] || Philidor Software) || Tandy/Radio Shack || 1982 || 1,2 or 3 || 16K || 1/2/3, 16K RAM. || [[Program Pak]] || Game || CB || 26-3158 || RSC-8
|-
| [[Bugs]] || [[Dave Shewchun]] and [[Roland Knight]] || [[Color Computer Magazine]] || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk or tape. || || Game || DECB || ||
|-
| [[Bugs II]] || [[Dave Shewchun]] and [[Roland Knight]] || [[Color Computer Magazine]] || 1984 || 1,2 or 3 || 64K || 1,2,3, 64K RAM. || Disk or tape || Game || DECB || ||
|-
| [[Bumpers]] || Charles Wallace || Mark Data Products || 1983 || 1,2 or 3 || 32K, 16K || 1,2,3, joystick, 16K RAM tape, 32K RAM disk or tape. || || Game || DECB || ||
|-
| [[Bustout]] || || TDP Electronics || 1981 || || || || [[Program Pak]] || Game || CB || 26-3170 ||
|-
| [[Buzzard Bait]] || Robert Lech & Troy Dahlman (Rugby Circle Inc.) || Tom Mix || 1983 || 1,2 or 3 || 32K || 1,2,3, joystick, 32K RAM, disk or tape. || || Game || DECB || ||
|-
| [[Buzzworm]] || Lee Earle || Novasoft (Tom Mix Software subsiduary) || Late 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joysticks optional. || || Game || DECB || ||
|-
| [[Caladuril: Flame of Light]] || Dave Triggerson and Jeff Noyle || Diecom Products || 1987 (Diecom release) and 1989 (Oblique Triad re-release) || 1,2 or 3 || 64K || 1/2/3 ONLY, 64K RAM, disk ONLY. || || Game || DECB || ||
|-
| [[Calixto Island (graphic version)]] || || Mark Data Products || End of 1983 or beginning of 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Candy Co.]] || David W. Clark, sound by Bob Miller || Intracolor || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk or tape. || || Game || DECB || ||
|-
| [[Canyon Climber]] || James Garon (Datasoft) || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM. || [[Program Pak]] || Game || DECB || 26-3089 || RSC-9
|-
| [[Card Games]] || || || || || || || || Game || DECB || 26-3320 || RSC-9
|-
| [[Cards And Slots]] || ??? (Nimbus Enterprises) || MicroDeal || 1989 (original Tom Mix version was 1986) || 3 ONLY || 128K || 3, 128K RAM, RGB Monitor (for proper colors), disk only, joystick optional. || || Game || DECB || ||
|-
| [[Cashman]] || Bill Dunlevy and Doug Frayer || Computer Shack (later Michtron) || July, 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Castle Guard]] || The Image Producers || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3079 || RSC-9
|-
| [[Castle of Tharoggad]] || Scott A. Cabit (Computerware) || Tandy/Radio Shack || 1988 || 3 ONLY || 128K || 3 ONLY, 128K RAM, mouse or joystick. || [[Program Pak]] || Game || DECB || 26-3159 ||
|-
| [[Catacomb (CC3)]] || L. Miller || Free/Shareware release || 1987? || 3 ONLY || 128K || 3, 128K RAM, disk, joystick. || || Game || DECB || ||
|-
| [[Catacomb (Oregon Computer Systems version)]] || Roger Smith || Oregon Color Computer Systems || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Catalyst]] || J. Weaver Jr. (Factory Programming), game concept by Paul Howe || Computer Shack (later Michtron) || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk, joystick optional. || || Game || DECB || ||
|-
| [[Catch Em]] || Dave Edson || Aadvark-80 || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Caterpillar (Dave Edson)]] || Dave Edson || Aadvark-80 || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick. || Disk, tape || Game || DECB || ||
|-
| [[Caterpillar (David Crandall)]] || David Crandall || David Crandall || 2001 (previously unreleased... written in 1983? || 1,2 or 3 || 16K || 1,2,3, 16K RAM, 2 joysticks (2 players), tape or disk. || || Game || DECB || ||
|-
| [[Caterpillar Cave]] || A. Pakerski || T&D Software || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Cave Hunter]] || Ron Krebs || Mark Data Products || 1981 || 1 or 2 ONLY || 16K || 1 or 2 ONLY, 16K RAM tape or 32K disk, joystick. || || Game || DECB || ||
|-
| [[Cave Walker]] || Spectral Associates || Radio Shack/Tandy || 1986 || 1 or 2 ONLY || 128K, 64K || 1 or 2, 64K RAM, disk drive, OS-9 Level I (included), or 3: 128K RAM, disk drive, OS-9 Level I version 2.0 (included) or OS-9 Level II. Joystick for both versions. || Disk || Game || OS-9, DECB || 26-3246 ||
|-
| [[Caviator]] || Rodger Smith || T&D Software || 1984(?) || 1,2 or 3 || 64K, 32K || 1,2,3, 32K RAM or 64K RAM, disk ONLY, joystick. || || Game || DECB || ||
|-
| [[CC-Thello]] || ??? || Spectral Associates || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Chambers]] || John Crane || Tom Mix Software || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, joystick, tape or disk. || || Game || DECB || ||
|-
| [[Champion]] || Glen R. Dahlgren || Originally Mark Data Products, then Sundog Systems || around Christmas, 1986 || 1,2 or 3 || 64K || 1/2/3, 64K RAM, disk only, joystick. || || Game || DECB || ||
|-
| [[Child Pace]] || ? || Radio Shack/Tandy || ? || 1,2 or 3 || 64K || 1/2/3, 64K RAM || Disk || Education || DECB || 26-3248 || Radio Shack Software Reference and Tandy Computer Guide (1986) p. 31
|-
| [[GFL Championship Football II]] || [[Greg L. Zumwalt]] & Mark Easter (ZCT Systems Group) for Gamestar || Tandy/Radio Shack || 1988 || 3 ONLY || 128K || 3 ONLY, 128K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3172 ||
|-
| [[C-Hawk Football]] || Stephen Macri || Freeware (released on Compuserve) || December, 1986 || 3 ONLY || 128K || 3, 128K RAM , cassette or disk. || || Game || DECB || ||
|-
| [[Checker King]] || Michael Marks & Peter Jennings (Personal Software Inc.) || Radio Shack/Tandy || 1980 || 1,2 or 3 || 4K || 1,2,3, 4K RAM. || [[Program Pak]] || Game || DECB || 26-3055 || RSC-4
|-
| [[Checkers]] || || || 1980 || || || || [[Program Pak]] || Game || DECB || 26-3055 ||
|-
| [[Chess]] || || || 1980 || || || Program Pak || [[Program Pak]] || Game || DECB || 26-3050 || RSC-4
|-
| [[Chess SD]] || ??? (Software Dynamics) || Computer Systems Distributors || 1984 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk only. || || Game || DECB || ||
|-
| [[Chopper Rescue]] || Rob Shaw || Prism Software || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended Basic, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Chopper Strike]] || John Crane || Computer Shack/Michtron || 1983 || 1,2 or 3 || 32K || 1,2,3, 16K or 32K RAM (two versions included), tape or disk, joystick. || || Game || DECB || ||
|-
| [[Circus Adventure]] || || || || || || || || || || ||
|-
| [[Civil War]] || ??? || ??? || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM casette or disk. || || Game || DECB || ||
|-
| [[Clock Program]] || || || || || || || || || || ||
|-
| [[Clowns and Balloons]] || [[Steve Bjork]] || Datasoft/Tandy || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3087 || RSC-9
|-
| [[Cmemory]] || || Micro-Labs, Inc. || || || || || || Game || DECB || ||
|-
| [[Coco Extravaganza]] || Roger Valentine || Tandy Home Education Systems/John Wiley & Sons Inc || 1984 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, Disk and cassette recorder (used for three programs only). || Disk || Game || DECB || ||
|-
| [[CocoMax 2]] || || || || || || || || Game || DECB || ||
|-
| [[CocoMax 3]] || || || || || || || || Game || DECB || ||
|-
| [[CocoMax]] || Hi-Res Pack || Colorware || || || || || [[Program Pak]]k || Game || DECB || ||
|-
| [[Coco-Pinball]] || ??? || ??? (T&D Software?) || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[CocoPro! Solitaire]] || ??? || DNM Enterprises, Inc. || 1992 || 3 || 128K || 1,2,3 || Disk || Game || OS9 LII || ||
|-
| [[Color Backgammon]] || || || || || || || || Game || DECB || 26-3059 || RSC-6
|-
| [[Color Baseball]] || [[Dale Lear]] || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3095 ||
|-
| [[Color Car Action]] || Dave Dies || Novasoft (Tom Mix subsiduary) || 1984 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Color Caterpillar]] || Robert Lech & Troy Dahlman (The Rugby Circle) || Soft Sector Marketing Inc. || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick, cassette or disk. || || Game || DECB || ||
|-
| [[Color Computer Learning Lab]] || || || || || || Cassette || || Game || DECB || 26-3153 || RSC-6
|-
| [[Color Cubes]] || [[R.G. Kilgus]] || Radio Shack/Tandy || 1981 || 1,2 or 3 || 4K || 1,2,3, 4K RAM. || [[Program Pak]] || Game || DECB || 26-3075 || RSC-8
|-
| [[Color Diagnostics v 2.0]] || || || || || || || || Game || DECB || AXX-2023 ||
|-
| [[Color File]] || || Tandy || || || || || || Game || DECB || 26-3103 || RSC-6
|-
| [[Color File II]] || || Tandy || 1986 || || || || || Game || DECB || 26-3110 ||
|-
| [[Color Forth]] || || Armadillo Int'l Software / Microworks || || || || || || Game || DECB || ||
|-
| [[Color Invaders]] || ??? || Computerware || 1981 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Color LOGO]] || [[Larry Kheriaty]] & [[George Gerhold]] || Radio Shack/Tandy || 1983 || 3 ONLY || || manual=26-2722/parent=26-2763, no teacher=26-2761 || [[Program Pak]] || Game || DECB || 26-2722 ||
|-
| [[Color LOGO]] || [[Larry Kheriaty]] & [[George Gerhold]] || Radio Shack/Tandy || 1983 || 3 ONLY || || Disk (manual=26-2722/parent=26-2763, no teacher=26-2761) || Disk || Game || DECB || 26-2721 ||
|-
| [[Color Meteoroids]] || ??? || Spectral Associates || 1981 (possibly re-released as MICROBES by Radio Shack/Tandy in 1983?) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Color Power II CP/M ROM]] || || Color Power Unlimited || || || || || || Game || DECB || ||
|-
| [[Color Robot Battle]] || Del Ogren (designed by Glenn Sogge) (The Image Producers) || Radio Shack/Tandy || Late 1981 || 1,2 or 3 || 16K || 1,2,3, 16K RAM. || [[Program Pak]] || Game || DECB || 26-3070 || RSC-9
|-
| [[Color Scripsit]] || [[Robert G. Kilgus]] || || 1981 || || || || [[Program Pak]] || Office || ECB || 26-3105 ||
|-
| [[Color Disk Scripsit]] || [[Robert G. Kilgus]] || || 1982 || || || || Disk || Office || DECB || 26-3255 || RSC-8
|-
| [[Color Scripsit II]] || || Dale Lear / Tandy || 1986 || || || || || Game || DECB || 26-3109 ||
|-
| [[Color Space Invaders]] || ??? || Spectral Associates (originally Barnett & Bank Bros.?) || 1981 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Color Term Plus]] || || Double Density Software || 1983 || || || || || Game || DECB || ||
|-
| [[Colorchestra]] || || (one set made with Walnut) Horizon || || || || || || Game || DECB || ||
|-
| [[Colorcom/E v 3]] || || Eigen Systems || || || || || || Game || DECB || ||
|-
| [[Colorcom/E v 4]] || || Eigen Systems / Spectrum Projects || || || || || || Game || DECB || ||
|-
| [[Colorout]] || ??? (Colorful Software) || Spectral Associates || 1981 || 1,2 or 3 || 16K, 4K || 1,2,3, 4K RAM cassette or 16K RAM disk, joystick optional. || || Game || DECB || ||
|-
| [[Colorpede]] || David W. Clark, sound by Bob Miller || Intracolor || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick, cassette or disk. || || Game || DECB || ||
|-
| [[Color-Trek]] || ??? || ??? (Spectral Associates) || ??? (1982?) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk. || || Game || DECB || ||
|-
| [[Colorzap]] || James Yee || Spectral Associates || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Computer Island]] || || || || || || || || || || ||
|-
| [[Contras]] || Jeff Steidl and Doug O. Masten || Sundog Systems || 1993 (originally supposed to be 1991) || 3 ONLY || 512K || 3, 512K RAM, disk only, joystick. || || Game || DECB || ||
|-
| [[Cosmic Ambush]] || Nick Marentes || Nick Marentes (originally hoped to be distributed by Radio Shack) || 1992 || 3 ONLY || 128K || 3 ONLY, 128K RAM, disk drive, joystick. || || Game || DECB || ||
|-
| [[Cosmic Clones]] || Robert Shaw || Mark Data Products || 1983 || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM cassette, 32K RAM disk, joystick. || || Game || DECB || ||
|-
| [[Cosmic Invaders]] || || Dragon Data Ltd || || || || || || Game || DECB || ||
|-
| [[Crash]] || Michel & Rejean Desjardins || Tom Mix Software || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Crazy Painter]] || Charles Guy || The Cornsoft Group || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk, joystick optional. || || Game || DECB || ||
|-
| [[Crosswords]] || [[The Image Producers]] || Radio Shack/Tandy || 1981 || 1,2 or 3 || 4K || 1,2,3, 4K RAM. || [[Program Pak]] || Game || DECB || 26-3082 || RSC-9
|-
| [[Crystle Castles]] || ??? (JON is built into the high score list... initials or 1st name of the author?) || Thundervision || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Cuber]] || ??? || Tom Mix Software || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM disk or tape. || || Game || DECB || ||
|-
| [[Cubix]] || Daron Stinnett || Spectral Associates || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM disk or tape. || || Game || DECB || ||
|-
| [[Cuthbert Goes Digging]] || ??? || Microdeal Cornwall || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM casette or 32K disk. || || Game || DECB || ||
|-
| [[Cuthbert Goes Walkabout]] || ??? || Microdeal Cornwall || 1982-1983? || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape, 32K disk. || || Game || DECB || ||
|-
| [[Cuthbert In The Mines]] || ??? || Microdeal Cornwall (Licensed to Tandy in Australia? Britain?) || 1984 || 1,2 or 3 || 16K || 1,2,3, 16K RAM casette or disk, joystick. || || Game || DECB || ||
|-
| [[Cyber Tank]] || Ottmar Bochardt || Mark Data Products || 1986 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, cassette or disk. Original version only worked on Coco 1/2 (overwrote GIME regs on Coco 3) || || Game || DECB || ||
|-
| [[Cyrus World Class Chess1]] || Intelligent Software/Dragon Data || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick optional. || [[Program Pak]] || Game || DECB || 26-3064 ||
|-
| [[Dallas Quest]] || James Garon (Datasoft) (game design by Louella Lee Caraway and Phyllis Wapner, Graphics by Kelly Day and Joe Pearson) || Radio Shack/Tandy/Datasoft || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk ONLY. || || Game || DECB || 26-3294 ||
|-
| [[Dancing Devil]] || Chris Latham || Tom Mix Software || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk. || || Game || DECB || ||
|-
| [[Danger Ranger]] || Ken Kalish || Med Systems/Screenplay || 1983 (Written November, 1982) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick, tape or disk. || || Game || DECB || ||
|-
| [[DASM/Demon Assembler]] || || (in box) Compusense || || || || || || Game || DECB || ||
|-
| [[Death Trap]] || || Soft Sector Marketing || 1983 || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM cassette, 32K RAM disk, joystick. || || Game || DECB || ||
|-
| [[Deathship]] || Rodger Olsen || Aardvark-80 || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Decathlon]] || Richard Borsheim || [[Spectral Associates]] || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk. || || Game || DECB || ||
|-
| [[Defense]] || ??? (Colorful Software) || [[Spectral Associates]] || 1982 (Colorful Software), 1984 (Spectral Associates) || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM tape, 32K RAM disk, joystick. || || Game || DECB || ||
|-
| [[Demolition Derby]] || [[John Gabbard]] - [[Spectral Associates]] || Radio Shack/Tandy || 1984 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3044 ||
|-
| [[Demon Attack]] || [[M. Voorsanger]] - [[Imagic]] || Tandy Corporation || 1984 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3099 ||
|-
| [[Demon Seed]] || Jeffrey Sorensen and Philip Mackenzie || Computer Shack/Michtron || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk. || || Game || DECB || ||
|-
| [[Demonstration Cartridge]] || || Dragon Data Ltd || || || || || || Game || DECB || A0109 ||
|-
| [[Desert Patrol]] || M.G. Lustig || Arcade Animation Inc. || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Desert Rider]] || Steve Bjork (Color America User Group & SRB Software) || Radio Shack/Tandy || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk, joystick. || || Game || DECB || ||
|-
| [[Devil Assault]] || Ken Kalish || Tom Mix Software || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Devious]] || Ryan Olsen || Spectral Associates || 1984 || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM tape, 32K RAM disk, joystick. || || Game || DECB || ||
|-
| [[Diagnostic ROM]] || || || || || || || || Game || DECB || 26-3019 || RSC-4
|-
| [[Diagnostic Test]] || || || || || || || || Game || DECB || ||
|-
| [[Diagnostics]] || || Radio Shack || 1980 || || || || || Game || DECB || 26-3019 || RSC-4
|-
| [[Dig]] || A. Pakerski || T&D Software, Issue #56 (Feb. 1987 issue) || 1987 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Dino Wars]] || [[R.G. Kilgus]] || Radio Shack/Tandy || 1980 (probably released 1981) || 1,2 or 3 || 4K || 1,2,3, 4K RAM, 2 joysticks. || [[Program Pak]] || Game || DECB || 26-3057 || RSC-6
|-
| [[Disto Super RAM Disk]] || || || || || || || || Game || DECB || ||
|-
| [[Dr. Who]] || Larry Lanberry || Prickly-Pear || 1985 || || || || || Game || DECB || ||
|-
| [[Don Pan]] || || Tomy/Tandy || 1985 || || || || [[Program Pak]] || Game || DECB || 26-3097 ||
|-
| [[Donald Duck's Playground]] || || || || || || || || || || ||
|-
| [[Donkey King (later called The King)]] || Chris Latham || Tom Mix Software || Late 1982 - renamed 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Donkey Kong]] || John Kowalski (Sock Master) and Nintendo || John Kowlaski - Freeware || March 31, 2007 || 3 ONLY || 512K || 3, 512K RAM, joystick. A 6309 does make the game run smoother, but is not required. || || Game || DECB || ||
|-
| [[Donpan]] || ??? (Tomy) || Radio Shack/Tandy || 1984 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick. || [[Program Pak]] || Game || DECB || ||
|-
| [[Donut Dilemma]] || Nick Marentes || Nick Marentes (distributed by Radio Shack in Australia, Game Point Software in North America) || 1986 || 1,2 or 3 || 64K || 1,2,3 (Coco 3 features extra colors), 64K RAM, disk drive. || || Game || DECB || ||
|-
| [[Doodle Bug]] || David Crandall || Computerware || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Doodlebug]] || || || || || || || || Game || DECB || ||
|-
| [[Doubleback]] || [[Dale Lear]] || Radio Shack/Tandy || 1982 || 1,2 or 3 || 4K || 1,2,3, 4K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3091 || RSC-9
|-
| [[Downland]] || [[Michael Aichlmayr]] || Licensed to Radio Shack/Tandy through [[Spectral Associates]] || 1983 || 1,2 or 3 || 16K || 1,2 ONLY, 16K RAM, joystick. (A cracked version that will work from disk, and the Coco 3, has been done.) || [[Program Pak]] || Game || DECB || 26-3046 ||
|-
| [[Dr. Livingston]] || ??? (Softside Magazine originally, modified by E.E.M.) || ??? || 1980 (Softside Magazine), April 1982 (E.E.M.) || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Draconian]] || Mike Hughey || Tom Mix Software || 1984 || 1,2 or 3 || 32K || 1,2 or 3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Dracula - Reading is Fun]] || || || || || || || || Game || DECB || 26-2550 || RSC-8
|-
| [[Dragon Slayer]] || Olaf Schroeder || Tom Mix Software || 1984 || 1,2 or 3 || 32K || 1,2 or 3 with 32K RAM, disk only, joystick optional. || || Game || DECB || ||
|-
| [[Dragon Fire]] || Frank Ellis (programmer), Matthew Sarconi (artwork) || Imagic, Tandy || 1984 || || || || Program Pak || Game || || 26-3098 ||
|-
| [[Dragon32 Demo]] || || || || || || || || Game || DECB || ||
|-
| [[Dragonblade]] || Glen R. Dahlgren || Prickly Pear Software, then Sundog Systems || 1986 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk. || || Game || DECB || ||
|-
| [[Dragonfire]] || [[Frank Ellis]] (artwork by [[Matthew Sarconi]]) - [[Imagic]] || Radio Shack/Tandy || 1984 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3098 ||
|-
| [[Draw Poker]] || Mike Burton || Freeware || October, 1986 || 3 ONLY || 128K || 3, 128K RAM , cassette or disk. || || Game || DECB || ||
|-
| [[Droll Attack]] || ??? || T&D Software?, Issue #30 || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk. || || Game || DECB || ||
|-
| [[Dungeon Raid]] || Ken Kalish || Microdeal UK || Late 1983 || 1,2 or 3 || 16K || Originally Dragon 32/64, this version: 1,2,3, 16K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Dungeons of Daggorath]] || [[Douglas J. Morgan]], [[Phil Landmeier], [[Keith Kiyohara]], and [[April Landmeier]] - [[Dyna Micro]] || [[Dyna Micro]] / Radio Shack || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM. || [[Program Pak]] || Game || DECB || 26-3093 || RSC-10
|-
| [[Dunkey Munkey]] || Harvey Brofman || Intellectronics || 1982 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Early Games]] || || || || || || || || || || ||
|-
| [[EDIT+]] || || Compusense || || || || || || Game || DECB || ||
|-
| [[Editor Assembler With ZBug]] || || || || || || || || Game || DECB || 26-3250 || RSC-6
|-
| [[EDTASM+]] v1.0 || || (One cart in package) Microsoft || 1982 || || || || || Game || DECB || 26-3250 ||
|-
| [[El Bandito]] || David Crandall || Mark Data Products || Early 1983 || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM tape, 32K RAM disk, joystick. || || Game || DECB || ||
|-
| [[El Diablero]] || Ken Kalish || Computerware || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk. || || Game || DECB || ||
|-
| [[Electron]] || Steve Giesking || Spectral Associates || 1984 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Eliminator, The]] || || Frank Hogg Laboratories || || || || || || Game || DECB || ||
|-
| [[Erland]] || Tim Bremser and Lloyd Pulley || Prickly-Pear Software || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Escape 2012]] || ??? (Steve Hartford?) || Computerware || 1985 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk. || || Game || DECB || ||
|-
| [[Eye-Spy]] || David Crandall || David Crandall || 2001 (previously unreleased, written in 1983?) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, 2 joysticks (2 players only). || || Game || DECB || ||
|-
| [[F-16 Assault]] || Kevin Hoare || Diecom Products || 1986 || 1,2 or 3 || 64K || 1,2,3, 64K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Facemaker]] || [[Spinnaker Software]] || Tandy/Radio Shack || 1984 || 1,2 or 3 || 16K || 1,2 or 3, 16K RAM, cassette. || [[Program Pak]] || Game || DECB || 26-3166 ||
|-
| [[Facts Match]] || || Micro school Programs || || || || || || || || ||
|-
| [[Fangman]] || David Crandall || Tom Mix Software || 1984 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick, tape or disk. || || Game || DECB || ||
|-
| [[Fembots Revenge]] || ??? (Kevin Herrboldt and Tim Nelson?) || Nelson Software Systems (later ColorQuest) || Late 1982 or early 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk. || || Game || DECB || ||
|-
| [[File Data Base]] || || home-made pak || || || || || || Game || DECB || ||
|-
| [[Fire One]] || || Ark Royal Games || 1987 || 3 ONLY || 128K || 3 ONLY, 128K RAM, cassette or disk. || || Game || DECB || ||
|-
| [[Firecopter]] || Dale Lear || Adventure International || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Fish]] || ??? || ??? || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Flight Simulator I]] || [[Greg L. Zumwalt]] || Radio Shack/Tandy || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM disk, joystick. || || Game || DECB || ||
|-
| [[Flippy]] || Rodger Smith || T&D Software, Issue #52 (Oct. 1986 issue) || 1986 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Fly By]] || Brian Mirtich || Chromasette || 1982(?) || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Foodwar]] || M.G. Lustig || Arcade Animation Inc. || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Football]] || || Radio Shack/Tandy || 1980 || 1,2 or 3 || 4K || 1,2,3, 4K RAM, 2 joysticks. || [[Program Pak]] || Game || DECB || 26-3053 || RSC-4
|-
| [[Force Field]] || A. Pakerski || T&D Software, Issue #19, January 1984 || Late 1983 || 1,2 or 3 || 16K || 1/2/3, 16K RAM, disk or cassette. || || Game || DECB || ||
|-
| [[Fortress of the Mutant Waffles]] || A. Pakerski || T&D Software || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Fourcube]] || David Bush || ??? || 198? || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick optional. || || Game || DECB || ||
|-
| [[Fraction Fever]] || [[Spinnaker Software]] || Tandy Corporation || late 1984 || 1,2 or 3 || 16K || 1,2,3, 16K RAM. || [[Program Pak]] || Game || DECB || 26-3169 ||
|-
| [[Frog Trek]] || George Bahr || Oelrich Publications || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk. || || Game || DECB || ||
|-
| [[Frogger]] || ??? || The Cornsoft Group || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick optional. || || Game || DECB || ||
|-
| [[Fruit Multi-Bars Slot Machine]] || ??? (White Cloud Software) || Tom Mix Software || 1986 || 3 ONLY || 128K || 3 ONLY, 128K RAM tape or disk. || || Game || DECB || ||
|-
| [[Fury]] || Timothy Purves || Computer Shack (later Michtron) || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Fyr-Draca]] || David Lionell Dawson || ColorQuest (games division of Nelson Sofware Systems (later Softlaw)) || 1983 || 1 or 2 ONLY || 16K || 1 or 2, 16K RAM tape or disk. || || Game || DECB || ||
|-
| [[Galactic Attack]] || [[Lou Haehn]] - [[The Image Producers]] || Radio Shack/Tandy || 1982 || 1,2 or 3 || 4K || 1,2,3, 4K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3066 || RSC-8
|-
| [[Galactic Fighter]] || Kevin Hoare || Four Star Software || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Galactic Taipan]] || David Cochrane || Ark Royal Games || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM Extended BASIC, cassette or disk. || || Game || DECB || ||
|-
| [[Galactic Trek]] || Rick McDannel || Color Compuer News (CCN) || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended Basic, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Galagon]] || Brett Keeton || Spectral Associates || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM tape or disk, joystick. 2 versions are known Tandy SSC voice supported or none Voice version, based on the arcade game Galaga || || Game || DECB || ||
|-
| [[Galax Attax]] || Tom D. Keeton || Spectral Associates || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Gantelet]] || Dave Dies || Diecom Products || 1986 || 1,2 or 3 || 64K || 1,2,3, 64K RAM tape or disk, joystick optional. || || Game || DECB || ||
|-
| [[Gantelet II]] || Roland Knight, level design and graphics by Dave Dies || Diecom Products || 1988 || 3 ONLY || 128K || 3 ONLY, 128K RAM, disk ONLY, joystick optional (2 button joystick recommended). || || Game || DECB || ||
|-
| [[Gate Crasher]] || Nick Marentes || Nick Marentes || 1999 || 3 ONLY || 512K || 3 ONLY, 512K RAM, disk. || || Game || DECB || ||
|-
| [[Gazon]] || ??? || K&K Computerware || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk, joystick optional. || || Game || DECB || ||
|-
| [[Gems]] || John R. Strong || Strongware || 1991 || 3 ONLY || 128K || 3, 128K RAM, disk ONLY, joystick optional, Orchestra-90 card optional. || || Game || DECB || ||
|-
| [[Germ Warfare]] || ??? || Chromasette || (198?) || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk, joystick optional. || || Game || DECB || ||
|-
| [[Ghana Bwana]] || Steve Bjork (SRB Software) || Radio Shack/Tandy || 1984 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk, joystick optional. || || Game || DECB || ||
|-
| [[Ghost Attack]] || || Dragon Data Ltd || || || || || || Game || DECB || ||
|-
| [[Ghost Gobbler]] || ??? || Spectral Associates || (1982) || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Gin Champion]] || [[Philidor Software]] || Radio Shack/Tandy || 1982 || 1, 2 or 3 || 16K || 1,2,3, 16K RAM tape or disk, joystick. || [[Program Pak]] || Game || DECB || 26-3083 || RSC-9
|-
| [[Glaxxons]] || Russell Peterson || Mark Data Products || 1983 || 3 ONLY || 16K || 3 ONLY, 16K RAM, cassette or disk drive, joystick. || || Game || DECB || ||
|-
| [[Gobbler]] || David Crandall || David Crandall || 2001 (previously unreleased... written in 1982) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, 2 joysticks (2 players), tape or disk. || || Game || DECB || ||
|-
| [[Gold Runner]] || Dave Dies || Novasoft (Tom Mix Software) || 1984-1985 || 1,2 or 3 || 64K || 1,2,3, 64K RAM tape or disk, joystick optional. || || Game || DECB || ||
|-
| [[Gold Runner 2000]] || Chet Simpson (some design work done by Eric Crichlow, from the original MM/1 version) || MediaLink Development || 1997 || 3 ONLY || 512K || 3, 512K RAM, disk, joystick optional. || || Game || DECB || ||
|-
| [[Gold Runner II]] || Dave Dies || Novasoft (Tom Mix Software) || 1986-1987 || 1,2 or 3 || 64K || 1,2,3, 64K RAM tape or disk, joystick optional. || || Game || DECB || ||
|-
| [[Golf]] || ??? || Aardvark-80 || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended Basic, tape or disk. || || Game || DECB || ||
|-
| [[Gomoku/Renju]] || [[Intelligent Software]] || Radio Shack/Tandy || 1982 || 1,2 or 3 || 4K || 1,2,3, 4K RAM. || [[Program Pak]] || Game || DECB || 26-3069 ||
|-
| [[Grabber]] || Mike Hughey || Tom Mix Software || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Grand Prix]] || David W. Clark, sound by Bob Miller || Intracolor || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, joystick, cassette or disk. || || Game || DECB || ||
|-
| [[Grand Prix Challenge]] || Dave Dies || Diecom Products || 1987 || 3 ONLY || 128K || 3, 128K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Graphic Mars]] || Roderick Smith (based on original text version by Rodger Olsen) || Aardvark Action Software (formerly Aardvark-80) || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk or tape. || || Game || DECB || ||
|-
| [[Graphic Pak]] || || || 1982 || || || || || Game || DECB || 26-3157 ||
|-
| [[Graphic Pyramid]] || Roderick Smith & Michael Roberts (based on original text version by Rodger Olsen) || Aardvark Action Software (formerly Aardvark-80) || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk or tape. || || Game || DECB || ||
|-
| [[Graphics Pak]] || || || || || || || || Game || DECB || 26-3157 || RSC-9
|-
| [[Graphitext]] || || Abacus Software || || || || || || Game || DECB || ||
|-
| [[Green Berets]] || Michael J. Keyes and Bill Butterworth || ??? (PD release?) || 198? || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Gremlml]] || ??? || ??? || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Greymoon]] || Bill Dunlevy || Computer Shack (later Michtron) || Late 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM tape or disk. || || Game || DECB || ||
|-
| [[Grid]] || A. Pakerski || Chromasette || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Guadal Canal]] || Phil Keeler || Ark Royal Games || 1983 || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM tape, 32K RAM disk. || || Game || DECB || ||
|-
| [[Hall of the King]] || Glen R. Dahlgren || Prickly Pear Software, then Sundog Systems || 1985 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk. || || Game || DECB || ||
|-
| [[Hall of the King II: The Inner Chambers]] || Glen R. Dahlgren || Prickly Pear Software, then Sundog Systems || 1986 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk. || || Game || DECB || ||
|-
| [[Hall of the King III: The Earthstone Revealed]] || Glen R. Dahlgren || Prickly Pear Software, then Sundog Systems || 1987 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk. || || Game || DECB || ||
|-
| [[Handball]] || ??? || Color Computer News (June 1983 issue) || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended Basic, tape or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Handyman]] || || || || || || || || Game || DECB || 26-3154 || RSC-6
|-
| [[Hangman]] || ??? || T&D Software || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, tape or disk. || || Game || DECB || ||
|-
| [[Haunted House]] || Darren Deloach and Tim Koonce (later Tim Kientzle) || Futurehouse Inc. - TRC MAgazine || late 1982 or early 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM BASIC, tape or disk. || || Game || DECB || ||
|-
| [[HDB-DOS DriveWire3]] || || || || || || || || Game || DECB || ||
|-
| [[High Speed Cassette System]] || || JPC Products || || || || || || Game || DECB || ||
|-
| [[Hopbopper]] || Kevin Derby || Public Domain release || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Hyper Zone]] || M.G. Lustig || Computerware || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Ice Hockey]] || Lou Fiorino || Computerware || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Ice Master]] || M.G. Lustig || Arcade Animation Inc. || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Images 1]] || || || || || || || || Game || DECB || 26-3300 || RSC-9
|-
| [[Images 2]] || || || || || || || || Game || DECB || 26-3301 || RSC-9
|-
| [[Instrument Flight Simulator]] || William G. Franklin || Rainbow Magazine || 16K version: Programmed 1982, published June 1983; 32K version:Programmed July 1983, published August 1984. || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM Extended BASIC (version 1) or 32K RAM Extended BASIC (version 2), tape or disk. || || Game || DECB || ||
|-
| [[Intercept 4]] || J. Weaver Jr. and John L. Stahl (Factory Programming) || Computer Shack/Michtron || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Invaders Revenge]] || Ken Kalish || Med Systems/Screenplay || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Inventions that Changed Our Lives]] || || || || || || || || Game || DECB || 26-2625 ||
|-
| [[Investment Analysis]] || || || || || || || || Game || DECB || 26-3102 || RSC-6
|-
| [[Iron Forest]] || Dave Dies (Graphics by Kevin Hoare) || Diecom Products || 1988 || 3 ONLY || 128K || 3, 128K RAM, disk only, Sega gun adaptor and Sega Phaser gun. || || Game || DECB || ||
|-
| [[Jaws (Pac Jaws)]] || Michael Freeman || ??? || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[JDOS v. 1.09]] || || J&M Controller || || || || || || Game || DECB || ||
|-
| [[Juniors Revenge]] || B.J. Chambless || Computerware || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Junkfood]] || David Taylor || Rainbow Magazine (Nov. 1984 issue) || 1984 || 1 or 2 ONLY || 16K || 1 or 2 ONLY, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Kamikaze]] || Phil Keller || Ark Royal Games || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick optional. || || Game || DECB || ||
|-
| [[Karate]] || Dave Dies || Diecom Products || Late 1985 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Katerpillar Attack]] || R & S Krotz || Tom Mix Software || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Kids On Keys]] || Designed by [[Freida Lekkerkerker]] for [[Spinnaker Software]] || Tandy Corporation || late 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk. || [[Program Pak]] || Game || DECB || 26-3167 ||
|-
| [[Killer Mansion]] || ??? || T & D Software || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Kindercomp]] || [[Spinnaker Software]] || Tandy Corporation || late 1984 || 1,2 or 3 || 16K || 1,2,3, 16K RAM. || [[Program Pak]] || Game || DECB || 26-3168 ||
|-
| [[Kingpede]] || Rodger Smith || T&D Software || July, 1987 issue || 1,2 or 3 || 32K || 1,2,3, 32K RAM tape or disk. || || Game || DECB || ||
|-
| [[Klendathu]] || Leo Christopherson || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape, joystick optional. || || Game || DECB || 26-2567 || RSC-10
|-
| [[Knock Out]] || Dave Dies || Diecom Products || 1985 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Koronis Rift]] || Ken Rogoway (Lucasfilm Ltd., for Epyx) || Epyx, sold through Tandy/Radio Shack || 1987 (original game on other platforms released 1985) || 1,2 or 3 || 128K || 1,2,3, 128K RAM, disk only, OS-9 Level II or NitrOS9 joystick. || || Game || DECB || ||
|-
| [[Kron]] || Roger Smith || Oregon Color Computer Systems || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Kung-Fu Dude]] || Glen R. Dahlgren || Sundog Systems || 1987 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk. || || Game || DECB || ||
|-
| [[Kyum Gai:To Be Ninja]] || Glen Dahlgren (RS-DOS version), and Glen Dahlgren/Kevin Darling/Eddie Kuns (OS-9 Version) || Sundog Systems || 1989 (RS-DOS version), 1990 (OS-9 version) || 3 ONLY || 256K, 128K || 3, 2 button joystick, disk, 128K RAM (RS-DOS version) or 256K RAM (OS-9 version). || || Game || DECB || ||
|-
| [[La Belle Lucie Solitaire]] || || Eversoft Games, Ltd. || 1990 || 3 ONLY || 128K || 3 ONLY, 128K RAM, disk, joystick. || || Game || DECB || ||
|-
| [[Labyrinth]] || Gerald Werner || Aardvark-80 || 1982 (Coding finished Nov. 19, 1981) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, Extended Basic, tape or disk. || || Game || DECB || ||
|-
| [[Lancer]] || Rick Lamont || Spectral Associates || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Lander]] || A. Pakerski || T&D Software || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Lansford Mansion]] || Dave Shewchun and Roland Knight (graphics by Kevin Hoare) || Diecom Products || 1987 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk. || || Game || DECB || ||
|-
| [[Le Mans]] || Rick Lamont || Spectral Associates || 1982 || 1,2 or 3 || 16K || 1,2,3, one or two joysticks, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Leisure Suit Larry in the Land of the Lounge Lizards]] || Al Lowe (original program), Chris Iden (Coco/OS-9 conversion) || Sierra On-Line (sold through Radio Shack/Tandy) || 1988 || 3 ONLY || 256K || 3, 256K RAM, disk only, OS-9 or NitrOS9, joystick optional. || || Game || DECB || ||
|-
| [[Liberty Ship]] || Rodger Smith || T&D Software, issue #45 || March 1986 issue || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick, cassette or disk. || || Game || DECB || ||
|-
| [[Little Runner]] || Charles A Husak || Rainbow Magazine || 1984 (March issue) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape. || || Game || DECB || ||
|-
| [[Lunar Lander]] || [[Greg L. Zumwalt]] || American Small Business Computers || 1981 (programmed by Feb. 12, 1981) || 1,2 or 3 || 16K || 1/2/3, 16K RAM, Extended BASIC, joystick. || || Game || DECB || ||
|-
| [[Lunar-Rover Patrol]] || Tom D. Keeton and Brett N. Keeton || Spectral Associates || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk or tape, joystick. || || Game || DECB || ||
|-
| [[Lunchtime]] || Claude R. Gagnon || Novasoft (Tom Mix Software) || 1986 || 1,2 or 3 || 32K || 1,2 or 3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Macro 80C]] || || Microworks || || || || || || Game || DECB || ||
|-
| [[Madam Rosas Massage Parlor]] || Bob Krotts (Coco version by James Nunke) || Softcore Software Company || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Madness and the Minotaur]] || || || || || || || || Game || DECB || 26-3313 || RSC-9
|-
| [[Major Istar - Under the Doomed Sea]] || B.J. Chambless || Computerware || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Marathon]] || John Fraysse || Afabear Software (Rainbow Magazine) || 1983 || 1,2 or 3 || 32K || 1,2,3, Extended Basic, 32K RAM recommended (special instructions for 16K), disk or tape, joystick. || || Game || DECB || ||
|-
| [[Marble Maze]] || Dave Dies || Diecom Products || 1985 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk or tape, joystick. || || Game || DECB || ||
|-
| [[Mars/Mars II]] || Rodger Olsen || Aardvark-80 || 1981-1982 (?) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, disk or tape. || || Game || DECB || ||
|-
| [[Martian Crypt]] || Scott Cabit (music by Ryan Sambrook) || Novasoft (Tom Mix Software) || 1985 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk or tape. || || Game || DECB || ||
|-
| [[Master Key II]] || || D Nelson/C Hohn/Computize || 1984 || || || || || Game || DECB || ||
|-
| [[Math Bingo]] || || Radio Shack/Tandy || 1980 || 1,2 or 3 || 4K || 1,2,3, 4K RAM. || [[Program Pak]] || Game || DECB || 26-3150 ||
|-
| [[Math Tutor]] || || Tandy || 1988 || || || || [[Program Pak]] || Game || DECB || 26-3148 ||
|-
| [[Medieval Madness]] || Dave Dies (Graphics by Lori Dies) || Diecom Products || Late 1988 or early 1989 || 3 ONLY || 128K || 3, 128K RAM, disk only, Sega gun adaptor and Sega Phaser gun. || || Game || DECB || ||
|-
| [[Mega-Bug]] || Steve Bjork (Datasoft) || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM. || [[Program Pak]] || Game || DECB || 26-3076 || RSC 8
|-
| [[Megapede]] || Mark Skala || Computerware || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Meteoroids]] || || Dragon Data Ltd || || || || || || Game || DECB || ||
|-
| [[Mickeys Space Adventure]] || ??? (Designed by Al Lowe for Walt Disney Personal Computer Software and Sierra On-Line) || Tandy/Radio Shack || late 1986 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk. || || Game || DECB || ||
|-
| [[Micro Illustrator]] || || || || || || || || Game || DECB || 25-1120 ||
|-
| [[Micro Painter]] || || || || || || || || Game || DECB || 26-3077 || RSC-8
|-
| [[Micro Painter **]] || || DataSoft / Tandy || 1982 || || || || || Game || DECB || 26-3077 ||
|-
| [[Microbes]] || [[Spectral Associates]] || Radio Shack/Tandy || 1982 or 1983 (possibly the re-release of COLOR METEOROIDS from Spectral in 1981?) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, 2 joysticks. || [[Program Pak]] || Game || DECB || 26-3085 || RSC-8
|-
| [[Microchess]] || Peter Jennings (Personal Software Inc.) || Radio Shack/Tandy || 1980 || 1,2 or 3 || 4K || 1,2,3, 4K RAM. || [[Program Pak]] || Game || DECB || ||
|-
| [[Microtext]] || || Microware || || || || || || Game || DECB || ||
|-
| [[Microworks Forth]] || || Microworks || 1981 || || || || || Game || DECB || ||
|-
| [[Middle Kingdom]] || ???(Jaysoft) || Computerware || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk. || || Game || DECB || ||
|-
| [[Mind-Roll]] || Jesse Taylor (tested by Erik Flom and Scott Duckett) (Epyx Software). Original version by Thalamus, Ltd., 1987-1988, also called Quedex. || Tandy/Radio Shack || 1989 || 1,2 or 3 || 128K, 64K || 1,2, (64K RAM) or Coco 3 (128K RAM), joystick optional. || [[Program Pak]] || Game || DECB || 26-3100 ||
|-
| [[Mine Rescue]] || Steve Bjork (SRB Software) || Game Point Software || 1988 || 3 ONLY || 128K || 3, 128K RAM, disk, joystick optional. || || Game || DECB || ||
|-
| [[Miss Gobbler]] || ??? (Procolour Group Inc.) || Spectral Associates || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Missile Attack]] || Larry F. Perry || 80 Micros || August 1982 issue || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Mission Impossible]] || Scott Adams (original 1979 version for other computers)/Roger Schrag (Coco conversion) || Adventure International || 1982(?) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Moby Dick]] || || || || || || || || Game || DECB || 26-2552 || RSC-8
|-
| [[Money Pak]] || || Computer Island || || || || Extended Basic || || || || ||
|-
| [[Monkey Kong]] || Ken Kalish || Med Systems/Screenplay || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Monster Maze]] || || Radio Shack/Tandy || 1983 || 1,2 or 3 || 4K || 1,2,3, 4K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3081 || RSC-9
|-
| [[Montezumas Dungeons]] || Greg Keyser || T&D Software, Issue #26 || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Moon Defense]] || Robert Evans || Public Domain/Shareware || 1987 || 3 ONLY || 128K || 3, 128K RAM, cassette or disk. || || Game || DECB || ||
|-
| [[Moon Flight]] || Paul Griffiths || Cload Publications Inc. || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Moon Hopper]] || M.G. Lustig || Computerware || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Moon Shuttle]] || Gerry Humphrey and James Garon || Datasoft || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick optional. || || Game || DECB || ||
|-
| [[Morocco GP]] || M.G. Lustig || Computerware || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Mountain Pilot]] || ??? || Instant Software || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Mouse Maze]] || John Kowlaski (under his alias Sockmaster) || John Kowalski || 2001 (previously unreleased) - written in 1986 || 1,2 or 3 || 64K || 1/2/3, 64K RAM, disk. || || Game || DECB || ||
|-
| [[Mr. Dig]] || ??? || Computerware || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Ms. Maze]] || ??? || Tom Mix Software || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Mudpies]] || Jeff Sorenson and Philip McKenzie || Computer Shack/Michtron || Late 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Music]] || || || || || || Program Pak || || Game || DECB || 26-3151 || RSC-4
|-
| [[Nerble Force]] || David Crandall || Computerware || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick, tape or disk. || || Game || DECB || ||
|-
| [[Neutroid II]] || Nick Marentes || Nick Marentes (originally hoped to be distributed by Radio Shack). Was released by Tom Mixs Novasoft in 1987 for a short time. || 1984 || 1 or 2 ONLY || 16K || 1 or 2 ONLY, 16K RAM, disk drive, joystick. || || Game || DECB || ||
|-
| [[New Burt]] || Mike Roberts || Mike Ro Products || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Ninja Warrior]] || Charles Forsythe || The Programmers Guild || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick optional. || || Game || DECB || ||
|-
| [[NitrOS9]] || || || || || || || || Game || DECB || ||
|-
| [[Nuclear Reactor Simulator]] || Chris Latham and John Erickson || Rainbow magazine || April 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM Extended BASIC, tape or disk. || || Game || DECB || ||
|-
| [[Nuclear Submarine Adventure]] || Robert J. (Bob) Retelle (plotted by Bob Retelle, Rodger Olsen, and ???) || Aardvark-80 || 1980 (I believe the Coco version came out in 1981 or 1982) || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, tape or disk. || || Game || DECB || ||
|-
| [[Offender]] || [[Greg L. Zumwalt]] || American Business Computers || 1981 or 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Official Radio Shack Coco 3 Demo]] || || || || || || || || Game || DECB || ||
|-
| [[One on One]] || Steve Bjork (SRB Software) based on original code for another platform by Eric Hammond || Electronic Arts; sold through Radio Shack/Tandy || 1985 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk, joystick(s). || || Game || DECB || ||
|-
| [[Orbitron]] || David Crandall || AHL Computing || 1983? || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick, tape or disk. || || Game || DECB || ||
|-
| [[Outhouse]] || J. Weaver Jr. (Factory Programming) and Larry Ashmun (uncredited) || Computer Shack (later Michtron) || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk, joystick optional. || || Game || DECB || ||
|-
| [[P-51 Mustang Attack Flight Simulator]] || Brian Bruderer || Tom Mix Software || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick, modem or null cable optional. || || Game || DECB || ||
|-
| [[Pac Droids]] || Charles Forsythe || The Programmers Guild || Late 1982 || 1,2 or 3 || 16K || 1,2,3 (3 for game only; credits/intro screen will not display properly), 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Pac-Dude]] || Brian ONeill || Shareware release || 1990 || 3 ONLY || 128K || 3 only, 128K RAM, joystick, disk only. || || Game || DECB || ||
|-
| [[PacDude Monster Maze]] || Brian ONeill (music by Chris Spry) || Brian ONeill || 1992 || 3 ONLY || 512K || 3 only, 512K RAM, joystick. || || Game || DECB || ||
|-
| [[Pack Maze]] || David Crandall || DSL Computer Products || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Pac-Man]] || Nick Marentes || Nick Marentes || 1997 || 3 ONLY || 512K || 3 ONLY, 512K RAM, disk, joystick. || || Game || DECB || ||
|-
| [[Pac-Tac]] || ??? || Computerware || 1981 || 1 or 2 ONLY || 16K || 1 or 2 ONLY, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Pac-Tac II]] || ??? || Computerware || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Pac-Tac version 2]] || Larry Bank || Not officially released || 1982(?) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Panic Button]] || [[Paul Kanevsky]] || [[First Star Software Inc.]] (later distributed by Tandy Corp.) || late 1983 || 1,2 or 3 || 16K || 1/2/3, 16K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3147 ||
|-
| [[Panzer]] || Patrick A. Ewing || T&D Software (Issue #54) || 1986 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Paper Route]] || Dave Dies || Diecom Products || Late 1985/early 1986 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Pegasus and the Phantom Riders]] || David Figge (Spectral Associates) || Radio Shack/Tandy || late 1984 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk, joystick(s). || || Game || DECB || ||
|-
| [[Pelieti]] || Roger Taylor || Roger Taylor (Freeware) || February, 1991 || 3 ONLY || 128K || 3, 128K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Pengon]] || Markus Foti (Megasoft) || Spectral Associates || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM tape or disk, joystick. || || Game || DECB || ||
|-
| [[Personafile]] || || || || || || Disk || || Game || DECB || 26-3260 || RSC-8
|-
| [[Personal Finance]] || || Tandy || || || || Program Pak || [[Program Pak]] || Game || DECB || 26-3101 || RSC-4
|-
| [[Personal Finance II]] || || two different sized manuals || 1983 || || || || [[Program Pak]] || Game || DECB || 26-3106 ||
|-
| [[Phantom Slayer]] || Ken Kalish || Med Systems (later Screenplay) || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Pharoahs Curse]] || ??? || ??? || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Photon]] || Jeff Steidl (Produced by Glen Dahlgren) || Sundog Systems || 1991 || 3 ONLY || 128K || 3, 128K RAM, disk only, joystick. || || Game || DECB || ||
|-
| [[Pinball]] || || Tandy || 1980 || || || Program Pak || [[Program Pak]] || Game || DECB || 26-3052 || RSC-4
|-
| [[Pinball Factory]] || Kary McFadden || Michtron (formerly Computer Shack) || 1986 || 1,2 or 3 || 64K || 1,2 or 3, 64K RAM, disk only. || || Game || DECB || ||
|-
| [[Pioneers in Technology]] || || || || || || || || Game || DECB || 26-2624 ||
|-
| [[Pitfall II]] || Steve Bjork (SRB Software) for Activision (original, non-Coco version by David Crane) || Tandy/Radio Shack || 1985 (original, non-Coco version released 1983) || 1,2 or 3 || 64K || 1/2/3, 64K RAM, disk ONLY, joystick. || || Game || DECB || ||
|-
| [[Pitstop II]] || ??? || Epyx || 1985 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Planet Invasion]] || Steve Gieseking || Spectral Associates || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Planetarium]] || || Moreton Bay Software || 1982 || 1,2 or 3 || || Coco 1/2/3?, 16 Kb, tape or disk. || Disk/Tape || || || ||
|-
| [[Plateau of the Past]] || ??? || Zytek, Ltd. || 1986 || 1,2 or 3 || 32K || 1/2/3, 32K RAM, disk required. || || Game || DECB || ||
|-
| [[Polaris]] || || Radio Shack/Tandy || 1981 or 1982 || 1,2 or 3 || 4K || 1,2 or 3, 4K RAM, joystick or mouse. || [[Program Pak]] || Game || DECB || 26-3065 || RSC-6
|-
| [[Poltergeist]] || ??? || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3073 || RSC-9
|-
| [[Ponk]] || Greg Helton || Greg Helton || 1987 || 3 ONLY || 128K || 3, 128K RAM, tape or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Pooyan]] || Gerry Humphrey and James Garon (Datasoft) || Radio Shack/Tandy || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, joysticks optional. || Tape || Game || DECB || ||
|-
| [[Popcorn]] || Steve Bjork (Datasoft) || Radio Shack/Tandy || 1981 || 1,2 or 3 || 4K || 1,2,3, 4K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3090 || RSC-8
|-
| [[Predator]] || || one in original package || 1989 || || || || || Game || DECB || 26-3165 ||
|-
| [[Program Catalog]] || || || || || || || || Game || DECB || ||
|-
| [[Programmable Sound Module]] || || Maple Leaf System || || || || || || Game || DECB || ||
|-
| [[Project Nebula]] || Robert Arnstein || Radio Shack/Tandy || 1982 || 1,2 or 3 || 4K || 1,2 or 3, 4K RAM, 2 joysticks. || [[Program Pak]] || Game || DECB || 26-3063 || RSC-6
|-
| [[Prospector]] || Lee J. Chapel || Rainbow Magazine || Dec. 1988 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, joystick. || Tape, Disk || Game || DECB || ||
|-
| [[Protector II]] || Robert Black (original Atari version by Mike Potter) || Synapse Software || 1983 || 1 or 2 ONLY || 32K || 1 or 2 ONLY, 32K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Protectors]] || Ron Beatty || Tom Mix Software || Late 1982 || 1,2 or 3 || 32K || 1,2 or 3, 32K RAM, cassette or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Pumpman]] || Dave Dies || Saguaro Software || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Pursuit]] || Craig Stewart || Radio Shack Australia || 1986 || 3 ONLY || 128K || 3, 128K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Pyramid]] || || || || || || Cassette || || Game || DECB || 26-3310 || RSC-8
|-
| [[Pyramid 2000]] || || Radio Shack/Tandy || || || || || || Game || DECB || 26-3310 || RSC-8
|-
| [[Pyramix]] || Jordan Tsvetkoff (Colorventure) || Dr. Prebles Programs || 1987 || 3 ONLY || 128K || 3, 128K RAM, tape or disk, joystick optional. || || Game || DECB || ||
|-
| [[Qiks]] || Ryan Olsen || Spectral Associates || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Quasar Commander]] || [[Robert G. Kilgus]] || Radio Shack/Tandy || 1980 || 1,2 or 3 || 4K || 1,2,3, 4K RAM, joysticks. || [[Program Pak]] || Game || DECB || 26-3051 || RSC-4
|-
| [[Quest]] || Bob Retelle and Rodger Olsen || Aardvark-80 || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Quest For Thelda]] || Eric A. Wolf || Sundog Systems || Late 1989 or early 1990 || 3 ONLY || 128K || 3, 128K RAM, disk only, joystick. || || Game || DECB || ||
|-
| [[Quix]] || Claude R. Gagnon (original prototype by Steve Ostrom) || Tom Mix Software || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Raaka-Tu]] || Robert Arnstein(?) || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette. || || Game || DECB || 26-3311 || RSC-8
|-
| [[Rad Warrior]] || Jesse Taylor (Palace Software) || Epyx (sold through Radio Shack) || 1988 || 3 ONLY || 128K || 3, 128K RAM, joystick optional. || [[Program Pak]] || Game || DECB || 26-3162 ||
|-
| [[Radio Ball]] || Robert Arnstein || Radio Shack/Tandy || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape. || || Game || DECB || ||
|-
| [[Rail Runner]] || ??? || Computerware || 1982 || 1 or 2 ONLY || 16K || 1 or 2 ONLY, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Rainbow Roach]] || John Fraysse (Afabear Software) || Rainbow Magazine || June 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, tape or disk. || || Game || DECB || ||
|-
| [[Rampage]] || || one in box - Tandy / Activision || 1989 || || || || || Game || DECB || 26-3174 ||
|-
| [[Rampage!]] || Steve Bjork for Activision || Tandy || 1989 || 3 ONLY || 128K || 3 ONLY, 128K RAM, joystick optional. || || Game || DECB || ||
|-
| [[Rat Attack]] || Wayne Wood and Gerry Casey || T&D Software, Issue #28 || Written 1983, released October 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, joystick, cassette or disk. || || Game || DECB || ||
|-
| [[Reactoid]] || || Radio Shack/Tandy || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3092 || RSC-10
|-
| [[Real Talker]] || || Colorware || || || || || || Game || DECB || ||
|-
| [[Rear Guard]] || Jim Hurd (Coniah Software) || Adventure International || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Recochet]] || ??? || ??? || ??? || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick, cassette or disk. || || Game || DECB || ||
|-
| [[Rescue on Fractalus]] || Ken Rogoway (Lucasfilm Ltd., for Epyx) || Epyx, sold through Tandy/Radio Shack || 1987 || 1,2 or 3 || 128K || 1,2,3, 128K RAM, disk only, OS-9 Level II or NitrOS9 joystick. || || Game || DECB || ||
|-
| [[Return of Juniors Revenge]] || B.J. Chambless (?) || Computerware || 1986 || 3 ONLY || 128K || 3 ONLY, 128K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Return of the Jeti]] || ??? || Thundervision || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[RoboCop]] || [[Greg L. Zumwalt]] || Data East / Tandy Corporation || 1989 || 3 ONLY || 128K || 3, 128K RAM. || [[Program Pak]] || Game || DECB || 26-3164 ||
|-
| [[Robot Battle]] || || [[Spectral Associates]]/Tandy || 1981 || || || || [[Program Pak]] || Game || DECB || 26-3070 ||
|-
| [[Robot Odyssey 1, Scape from Robotropolis]] || || The Learning Company || || || || || || || || 26-3284 ||
|-
| [[Robotack]] || David W. Clark, sound by Bob Miller || Intracolor || Early 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Rogue]] || Mike L. Leber, Ron B. Miller, James Long & Ed Rosenzweig for Epyx (based on minicomputer/mainframe version by Michael Toy, Ken Arnold & Glenn R. Wichman) || Tandy/Radio Shack || 1986 || 3 ONLY || 128K || 3 ONLY, 128K RAM (256K for graphics font version). || || Game || DECB || ||
|-
| [[Roller Controller]] || ??? || Spectral Associates || 1986 || 3 ONLY || 128K || 3, 128K RAM, tape or disk, joystick optional. || || Game || DECB || ||
|-
| [[Roman Checkers]] || [[Al Baker]] - [[The Image Producers]] || Radio Shack/Tandy || Late 1981 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick(s) optional. || [[Program Pak]] || Game || DECB || 26-3071 || RSC-8
|-
| [[Romless Pak I]] || || Microware || || || || || || Game || DECB || ||
|-
| [[Romless Pak II]] || || Microware || || || || || || Game || DECB || ||
|-
| [[Rommel 3D]] || Kary McFadden || Michtron (formerly Computer Shack) || 1985 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Rubicon II]] || Phillip E. Keller || Ark Royal Games || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Rupert Rythym: The Music Box Caper]] || Nickolas Marentes || Now self-published, previously Game Point Software (in the U.S./Canada) and Tandy (Australia) || 1988 || 3 ONLY || 128K || 3, 128K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[RushN Assault]] || Dave Dies || Diecom Products || 1988 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, disk, joystick (2 button joystick optional, but helpful. || || Game || DECB || ||
|-
| [[Sailor Man]] || Chris Latham || Tom Mix Software || 1984 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, joystick, cassette or disk. || || Game || DECB || ||
|-
| [[Sam Sleuth]] || Steve Hartford || Computerware || 1984 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, tape or disk, joystick or mouse. || || Game || DECB || ||
|-
| [[Sands of Egypt]] || James Garon, Ralph Burris, Steve Bjork (Datasoft) || Radio Shack/Tandy || 1982 || 1,2 or 3 || 32K || 1,2 or 3, 32K RAM, disk only. || || Game || DECB || 26-3299 || RSC-9
|-
| [[Screen Print Program]] || || || || || || || || Game || DECB || 26-3021 || RSC-6
|-
| [[Sea Battle]] || Bob Kimball Woodward || Public Domain/Shareware (released on Compuserve) || June 14, 1987 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk. || || Game || DECB || ||
|-
| [[Sea Dragon]] || Jim Hurd (Coniah Software) || Adventure International || Late 1982 or early 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick optional. || || Game || DECB || ||
|-
| [[Sea Search (formerly Sea Quest)]] || || Mark Data Products || End of 1983/beginning of 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk.(originally Sea Quest) || || Game || DECB || ||
|-
| [[Sea Stalker]] || ??? (original version by Stu Galley and Jim Lawrence) || Infocom || 1984 || 1,2 or 3 || 32K || 1,2 or 3, 32K RAM, disk only. || || Game || DECB || ||
|-
| [[Shamus]] || William Mataga and Larry Abel (Synapse Software) || Synapse Software in 1983, later through Radio Shack/Tandy || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape (Synapse only) or disk (as sold throught Radio Shack/Tandy), joystick. || || Game || DECB || ||
|-
| [[Shanghai]] || Rick Adams (Activision) (cartridge original), and Bill Nobel/Alan Dekok (OS-9 version) || Radio Shack/Tandy || 1987 || 3 ONLY || 256K, 128K || 3, 128K RAM, joystick (Radio Shack version), or 256K RAM, disk, joystick optional (OS-9/NitrOS9 version). || [[Program Pak]] || Game || DECB || 26-3084 ||
|-
| [[Shark Treasure]] || Greg W. Anderson || Computerware || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Shenanigans]] || || Mark Data Products || Late 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Shiphunt]] || Wilfred H. Barber || Free Coco Software || 1984 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Shock Trooper]] || Rob Shaw || Mark Data Products || 1985 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Shooting Gallery]] || James Garon (Datasoft) || Radio Shack/Tandy || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3088 || RSC-8
|-
| [[Shuttle Simulator]] || John Fraysse || Tom Mix Software || 1982 || 1,2 or 3 || 32K || 1,2,3, 32K RAM Extended BASIC, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Silpheed]] || RS-DOS version: C. Daron Stinnett (Synergistic Software), Robert Lindsley & Michael Ormsby (Level Design) for Sierra Online, original game by Game Arts || Radio Shack/Tandy || 1988 || 1,2 or 3 || 128K, 16K || 1,2, 16K RAM, 3 version: 128K RAM). Joystick optional. || [[Program Pak]] || Game || DECB || 26-3054 ||
|-
| [[Sinistaar]] || ??? (Phantom Software) || Sundog Systems || 1989 || 3 ONLY || 512K || 3, 512K RAM, disk only, joystick (2 button recommended). || || Game || DECB || ||
|-
| [[Skiing]] || Robert G. Kilgus || Radio Shack/Tandy || 1980 (may have been delayed until early 1981) || 1,2 or 3 || 16K || 1,2,3, 4K or 16K RAM (16K recommended), joystick. || [[Program Pak]] || Game || DECB || 26-3058 || RSC-6
|-
| [[Skramble]] || ??? || Tom Mix Software || 1983 || 1,2 or 3 || 32K, 16K || 1,2,3 16K RAM tape or 32K RAM disk, joystick. || || Game || DECB || ||
|-
| [[Sky-Defense]] || ??? || Quasar Animations || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Skyway]] || Rodger Smith || Novasoft (Tom Mix subsiduary) || 1985 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, joystick, cassette or disk. || || Game || DECB || ||
|-
| [[Slay The Nereis]] || [[Spectral Associates]] || Tandy Corporation || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3086 || RSC-10
|-
| [[Slot Machine]] || ??? || ??? || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended Basic, tape or disk. || || Game || DECB || ||
|-
| [[Slot Pack II]] || || Howard Medical || || || || || || Game || DECB || ||
|-
| [[Slot Pack III]] || || (with AC adapter) Howard Medical || || || || || || Game || DECB || ||
|-
| [[Slots]] || ??? || ??? || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Smartwatch [[Program Pak]]]] || || || || || || || || Game || DECB || ||
|-
| [[Snak Pac]] || Larry Bank || Tom Mix Software || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Snake Pit]] || Steve Bjork || SRB Software and Game Point Software || 1989 || 1,2 or 3 || 64K || 1,2 or 3 with 64K RAM, disk only, joystick. || || Game || DECB || ||
|-
| [[Soko-ban]] || ??? (Spectral Associates) || Tandy (licensed from Sphere Inc., which was licensed from ASCII Corp., which was licensed from Thinking Rabbit) || 1988, original copyright 1984 || 3 ONLY || 128K, 32K || 1 and 2 version - 32k RAM required; Coco 3 version, 128K RAM required, joystick optional. || [[Program Pak]] || Game || DECB || 26-3161 ||
|-
| [[Soliddrive RAM Pak]] || || || || || || || || Game || DECB || ||
|-
| [[Soviet Bloc]] || John R. Strong || Strongware || 1991 || 3 ONLY || 128K || 3, 128K RAM, disk ONLY, joystick optional, Orchestra-90 card optional. || || Game || DECB || ||
|-
| [[Space Ambush]] || Andy Kluck || Computerware || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk, joystick optional. || || Game || DECB || ||
|-
| [[Space Assault]] || || Radio Shack/Tandy || 1981 || 1,2 or 3 || 4K || 1,2,3, 4K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3060 || RSC-6
|-
| [[Space Hunter]] || || || || || || || || Game || DECB || ||
|-
| [[Space Intruders]] || Nick Marentes || Nick Marentes (distributed by Radio Shack in Australia, Game Point Software in North America) || 1988 || 3 ONLY || 128K || 3 ONLY, 128K RAM, disk drive, joystick. || || Game || DECB || ||
|-
| [[Space Marauder]] || Craig Stewart || Radio Shack Australia || 1987 || 3 ONLY || 128K || 3, 128K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Space Probe: Math]] || || || || || || || || Game || DECB || 26-2537 || RSC-10
|-
| [[Space Race]] || Rick Lamont and Daron Stinnett || Spectral Associates || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk, joystick optional. || || Game || DECB || ||
|-
| [[Space Raiders]] || Brian Bruderer || Mark Data Products || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Space Wrek]] || Steve Gieseking || Spectral Associates || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Space Zapper]] || ??? || ??? || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, cassette or disk. || || Game || DECB || ||
|-
| [[Spectaculator]] || || Radio Shack/Tandy || || || || || || Game || DECB || 26-3256 || RSC-8
|-
| [[Spectrum Voice Pak]] || || Spectrum Projects || || || || || || Game || DECB || ||
|-
| [[Speech Sound]] || || Tandy || || || || || || Game || DECB || 26-3144 ||
|-
| [[Speech Synthesizer]] || || Alford and Associates || || || || || || Game || DECB || ||
|-
| [[Speech Systems Midi - lg white pak]] || || 2 5-pin jacks on side || || || || || || Game || DECB || ||
|-
| [[Speed Racer]] || Steven Hirsch || Michtron (formerly Computer Shack) || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Spidercide]] || [[Tim Swisher]] || Tandy Corporation || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3049 ||
|-
| [[Spider-Hype]] || Roger Taylor || Public Domain || 1992 || 3 ONLY || 128K || 3, 128K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Spider-Hyper]] || Roger Taylor || Public Domain || 1996 || 3 ONLY || 128K || 3 with 6309 upgrade chip, 128K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Spinster Cafe]] || Raleigh Rivers || T&D Software, Issue #78 || December, 1988 issue || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk. || || Game || DECB || ||
|-
| [[Springster]] || [[Spectral Associates]] || Radio Shack/Tandy || 1987 || 3 ONLY || 128K || 3, 128K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3078 ||
|-
| [[Squash]] || J.R. Applegate || ??? || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, cassette or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[SR-71]] || Lee Earle || Tom Mix Software || Late 1983/early 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM Extended BASIC, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Star Blaster]] || Jim Kearney || Micro Works || 1981 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick optional. || [[Program Pak]] || Game || DECB || ||
|-
| [[StarBlaze]] || [[Greg L. Zumwalt]] || Tandy/Radio Shack || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3094 ||
|-
| [[Star Spores]] || David Shadoff || Spectral Associates || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM , cassette or disk, joystick optional. || || Game || DECB || ||
|-
| [[Star Trader]] || Steve Hartford || Computerware || 1984 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Star Trek III]] || Lance Micklus || Lance-Micklus Inc. - distributed by Adventure International || 1981 || 1,2 or 3 || 32K || 1,2,3, 32K RAM Extended BASIC, cassette, joystick. || || Game || DECB || ||
|-
| [[Starfire]] || Harvey Brofman || Intellectronics || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM , cassette or disk. || || Game || DECB || ||
|-
| [[Starship Chameleon]] || Ken Kalish || Computerware || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM , cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Stellar Life Line]] || Steve Bjork (SRB Software) || Radio Shack/Tandy Corp. || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cartrudge || [[Program Pak]] || Game || DECB || 26-3047 ||
|-
| [[Stereo Composer]] || || Speech Systems || || || || || || Game || DECB || ||
|-
| [[Stereo Music]] || || || 1984 || || || || || Game || DECB || 26-3143 ||
|-
| [[Storm]] || ??? || Computerware || 1982 || 1 or 2 ONLY || 16K || 1 or 2 ONLY, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Storm Arrows]] || Tom D. Keeton || Spectral Associates || 1983 (written 1982) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Sub Battle Simulator]] || Jesse Taylor & Mike Leber || Epyx, sold through Tandy/Radio Shack || 1987 || 1,2 or 3 || 128K || 1,2,3, 128K RAM, disk only, OS-9 Level II or NitrOS9, joystick optional. || || Game || DECB || 26-3272 ||
|-
| [[Super Bustout]] || [[Glenn Sogge]] (Designed by [[Al Baker]] and [[Dick Ainsworth]]) - [[The Image Producers]] || Radio Shack/Tandy || 1980 || 1,2 or 3 || 4K || 1,2,3, 4K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3056 || RSC-6
|-
| [[Super Charger]] || || Spectral Associates || || || || || || Game || DECB || ||
|-
| [[Super Color Bug]] || || Nelson Software || || || || || || Game || DECB || ||
|-
| [[Super Color Stretcher]] || || Nelson Software || || || || || || Game || DECB || ||
|-
| [[Super Color Terminal]] || || Nelson Software || || || || || || Game || DECB || ||
|-
| [[Super Color Writer II]] || || Nelson Software || || || || || || Game || DECB || ||
|-
| [[Super Color Writer v 1.0]] || || Nelson Software || || || || || || Game || DECB || ||
|-
| [[Super Dragon Writer]] || || || || || || || || Game || DECB || ||
|-
| [[Super Logo]] || || Larry Kheriaty/George G/Tandy || 1984 || || || || [[Program Pak]] || Game || DECB || 26-2717 ||
|-
| [[Super Mastermind]] || Bill Nobel and Darryl Hildebrandt || Freeware || 1987 || 3 ONLY || 128K || 3, 128K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Super Pitfall]] || Steve Bjork (SRB Software) for Activision || Tandy/Radio Shack || 1988 || 3 ONLY || 128K || 3 ONLY, 128K RAM, joystick optional. || || Game || DECB || 26-3171 ||
|-
| [[Super Vaders]] || Darrell Ulm || T&D Software || 1985 || 1,2 or 3 || 32K || 1,2,3, 32K RAM , cassette. || || Game || DECB || ||
|-
| [[Symphony12]] || || Speech Systems / Del Software || || || || || || Game || DECB || ||
|-
| [[Syzygy]] || Scott Cabit || Spectral Associates || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk. || || Game || DECB || ||
|-
| [[Tanks]] || Larry D. Becker || 80 Micros magazine || August 1982 issue || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, tape or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[Temple of ROM]] || Rick Adams || Radio Shack/Tandy || 1982 || 1,2 or 3 || 4K || 1,2,3, 4K RAM, joystick. || [[Program Pak]] || Game || DECB || 26-3045 ||
|-
| [[Tennis]] || || Radio Shack/Tandy || 1982 || 1,2 or 3 || 4K || 1,2,3, 4K RAM, 1 or 2 joysticks. || [[Program Pak]] || Game || DECB || 26-3080 || RSC-8
|-
| [[Tetra]] || Brian ONeill || Brian ONeill || 1991 || 3 ONLY || 128K || 3, 128K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Tetris]] || [[Greg L. Zumwalt]] (Academy Soft-ELORG) || Radio Shack/Tandy || 1987 || 1,2 or 3 || 128K, 16K || 1,2,3 (special features on 3), 16K RAM (128K RAM on Coco 3). || [[Program Pak]] || Game || DECB || 26-3163 ||
|-
| [[The Black Sanctum (graphic version)]] || || Mark Data Products || End of 1983 or beginning of 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk. || || Game || DECB || ||
|-
| [[The Crystal City]] || Jeremy Spiller (Gosub Software) || Sundog Systems || Late 1990 || 3 ONLY || 512K || 3, 512K RAM, disk ONLY, joystick. || || Game || DECB || ||
|-
| [[The Factory]] || ??? (Sunburst Communications, game designed by Marge Kosei and Mike Fish) || Tandy Corporation || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk. || || Game || DECB || ||
|-
| [[The Force]] || Charles J. Roslund || Anteco Software || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[The Frog]] || A. Hubble || Tom Mix Software || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk. || || Game || DECB || ||
|-
| [[The Hound of Baskervilles]] || || || || || || || || Game || DECB || 26-2551 || RSC-8
|-
| [[The Interbank Incident]] || || Radio Shack/Tandy || 1985 || 1,2 or 3 || 64K || 1/2/3, 64K RAM, disk only, joystick or mouse. || || Game || DECB || ||
|-
| [[The Lair]] || Tom Stephenson and James J. Walton || Freebooter Software || 1985 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[The Microscopic Mission]] || Desing by Robert C. Clardy and Alan H. Zalta; Coco3 version programmed by Mark W. Easter And [[Greg L. Zumwalt]] || Activision/Tandy || 1987 || 3 ONLY || 128K || 3 128K RAM, disk ONLY, Joystick optional. || || Game || DECB || 26-3271 ||
|-
| [[The Pond]] || Larry Bank (Sunburst Communications, game designed by Eric Grubbs and Mike Fish) || Tandy Corporation || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk. || || Game || DECB || ||
|-
| [[The Schoolmaze Adventure]] || || || || || || || || || || ||
|-
| [[The Touchstone]] || ??? || Tom Mix Software || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, joystick, cassette or disk. || || Game || DECB || ||
|-
| [[The Vortex Factor]] || || Mark Data Products || 1985 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Thermo Patch for TLW-401 Label Maker]] || || Thermo Patch || || || || || || Game || DECB || ||
|-
| [[Thexder]] || RS-DOS version: C. Daron Stinnett (Synergistic Software), OS-9/NitrOS9 version by Alan Dekok. (Sierra On-Line official software company) || Radio Shack/Tandy || 1988 (RS-DOS cartridge version), 1991(?) (OS-9 disk version) || 3 ONLY || 256K, 128K || 3, (RS-DOS version: 128K RAM, cartridge), (OS-9/NitrOS9 version: 256K RAM, disk). || [[Program Pak]] || Game || DECB || 26-3072 ||
|-
| [[Three In a Row]] || Charles Price || Freeware (released on Compuserve) || 1987 (?) || 3 ONLY || 128K || 3, 128K RAM, cassette or disk, joysticks optional. || || Game || DECB || ||
|-
| [[Time Bandit]] || Bill Dunlevy and Harry Lafnear || Computer Shack/Michtron || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk, joystick optional. || || Game || DECB || ||
|-
| [[Time Fighter]] || Rob Shaw || Mark Data Products || 1983 || 1,2 or 3 || 32K, 16K || 1,2,3, 16K RAM cassette, 32K RAM disk, joystick. || || Game || DECB || ||
|-
| [[Time Patrol]] || M.G. Lustig || Computerware || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[To Preserve Quandic]] || David Karam (Suspense Software) || Prickly-Pear Software || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, disk only. || || Game || DECB || ||
|-
| [[Tool Kit]] || || Premier Micro Systems || || || || || || Game || DECB || ||
|-
| [[Tower of Fear]] || Charles Forsythe || Programmers Guild || Late 1981 or early 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, cassette or disk. || || Game || DECB || ||
|-
| [[Trailin Tail]] || Mike Hall || Rainbow magazine || August 1983 issue || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, cassette or disk, joystick optional. || || Game || DECB || ||
|-
| [[Trapball]] || ??? || T&D Software, Issue #27 || 198? || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Trapfall]] || Ken Kalish || Tom Mix Software || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Trekboer]] || || Mark Data Products || Late 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Trickashay]] || David Crandall || AHL Computing || 1983? || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick, tape or disk. || || Game || DECB || ||
|-
| [[TRS-80 Chemistry Lab, Vol. I]] || || || || || || || || Game || DECB || 26-2626 ||
|-
| [[TRS-80 Color Forth]] || || Talbot Microsystems || || || || || || Game || DECB || ||
|-
| [[TRS-80 Color PILOT]] || || || || || || Cassette || || Game || DECB || 26-2709 ||
|-
| [[TRS-80 Color PILOT]] || || || || || || Disk || || Game || DECB || 26-2710 ||
|-
| [[Trubble]] || John Demchenko || Freeware || 1990 || 3 ONLY || 128K || 3, 128K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Tube Frenzy]] || Dave Edson || Aadvark-80 || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Turret]] || Clayton R. Moore || T&D Software, Issue #78 || December, 1988 issue || 1,2 or 3 || 32K || 1,2,3, 32K RAM, Extended BASIC, joystick, cassette or disk. || || Game || DECB || ||
|-
| [[Tutankam]] || Dave Edson || Aadvark-80 || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Tuts Tomb]] || Rob Shaw and Ron Krebs || Mark Data Products || 1984 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Typemate]] || || || 1988 || || || || || Game || DECB || 26-3155 ||
|-
| [[Typing Tutor]] || || || || || || || || Game || DECB || 26-3152 || RSC-6
|-
| [[Varloc]] || [[Greg L. Zumwalt]] || Radio Shack/Tandy || 1985 || 1,2 or 3 || 64K || 1/2/3, 64K RAM, disk only, joystick. || || Game || DECB || ||
|-
| [[Vegas Gamepak]] || Dan Nelson || Nelson Software Systems || 1981 or 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Venturer]] || Dave Edson || Aadvark-80 || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[Video Keno]] || Kevin and Douglas Leany || Tom Mix Software || 1984 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Video Pinball]] || ??? || Radio Shack/Tandy || Late 1980 || 1,2 or 3 || 4K || 1,2,3, 4K RAM, joysticks. || [[Program Pak]] || Game || DECB || ||
|-
| [[Videotex]] || || || 1981 || || || Program Pak || || Game || DECB || 26-2222 || RSC-6
|-
| [[Viet Cong (V.C.)]] || ??? || Microcomputer Games (division of Avalon Hill Game Company) || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk, joystick optional. || || Game || DECB || ||
|-
| [[Viking]] || ??? (Possibly Tim Bremser and Lloyd Pulley?) || Prickly-Pear Software || 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, tape or disk. || || Game || DECB || ||
|-
| [[VIP Terminal]] || || Softlaw || || || || || || Game || DECB || ||
|-
| [[Vocabulary Tutor 1]] || || || || || || || || Game || DECB || 26-2568 || RSC-8
|-
| [[Vocabulary Tutor 2]] || || || || || || || || Game || DECB || 26-2569 || RSC-8
|-
| [[VoxChess]] || David Crandall || Computerware || 1985 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk. || || Game || DECB || ||
|-
| [[Voyager]] || William Volk || Avalon Hill || Late 1981 (advertised in January, 1982 catalog) || 1,2 or 3 || 16K || 1,2,3, 16K RAM Extended BASIC, cassette or disk. || || Game || DECB || ||
|-
| [[Wacky Food]] || M.G. Lustig || Arcade Animation Inc. || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, tape or disk, joystick. || || Game || DECB || ||
|-
| [[War Kings]] || Charles J. Roslund || Tom Mix Software || early 1982 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk, 2 joysticks. || || Game || DECB || ||
|-
| [[War Monger]] || Greg Wittmeyer || GSW Software (called A World At War originally), then Sundog Systems (as War Monger) || 1989 (GSW Software, 1991 (Sundog Systems) || 3 ONLY || 128K || 3, 128K RAM, disk ONLY, joystick optional. || || Game || DECB || ||
|-
| [[Warlords]] || ??? || T&D Software || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Warp Fighter 3-D]] || Steve Bjork || SRB Software || 1987 || 3 ONLY || 128K || 3, 128K RAM, disk, joystick, 3-D glasses optional. || || Game || DECB || ||
|-
| [[Warrior King]] || Glen R. Dahlgren || Sundog Systems || 1988 || 3 ONLY || 128K || 3 with 128K RAM, disk only, joystick. || || Game || DECB || ||
|-
| [[Weirdo]] || Rodger Smith || T&D Software, Issue #58 || May, 1987 issue || 1,2 or 3 || 16K || 1,2,3, 16K RAM, joystick, cassette or disk. || || Game || DECB || ||
|-
| [[Where in the world is carmen san diego]] || Dane Bigham || Broderbund/Tandy || || 3 ONLY || 128K || 3 ONLY, 128K RAM, disk, Keyboard or joystick. || || Game || DECB || 26-3243 ||
|-
| [[Whirlybird Run]] || Brett Norman || Spectral Associates || 1983 (written 1982) || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Wildcatting]] || ??? (The Image Producers) || Radio Shack/Tandy || 1981 || 1,2 or 3 || 4K || 1,2,3, 4K RAM, joystick optional. || [[Program Pak]] || Game || DECB || 26-3067 || RSC-8
|-
| [[WIZ Terminal Program]] || || || || || || || || Game || DECB || ||
|-
| [[Wizards Den]] || Matt Harper || Novasoft (Tom Mix subsiduary) || 1987 || 1,2 or 3 || 64K || 1,2 or 3 with 64K RAM, disk only, joystick optional. || || Game || DECB || ||
|-
| [[Word-Pak]] || || PBJ || 1983 || || || || || Game || DECB || ||
|-
| [[WordPak II]] || || PBJ || || || || || || Game || DECB || ||
|-
| [[WordPak-RS]] || || PBJ / Radio Shack || || || || || || Game || DECB || ||
|-
| [[Worlds of Flight]] || John Fraysse and Mike Hughey || Tom Mix Software || 1984 || 1,2 or 3 || 32K || 1,2 or 3, 32K RAM, cassette or disk drive, 2 joysticks. || || Game || DECB || ||
|-
| [[Wrestle Maniac]] || Kevin Hoare || Diecom Products || 1986 || 1,2 or 3 || 64K || 1,2,3, 64K RAM, tape or disk, 1 or 2 joysticks. || || Game || DECB || ||
|-
| [[Xenion]] || Kevin Hoare || Diecom Products || 1987-88 || 1,2 or 3 || 128K || Space shoot'n up game. Author that a separate Coco 1,2/Dragon version was first sent to Diecom, before a Coco 3 version. || || Game || DECB || ||
|-
| [[Yahtzee (80 column version)]] || Jim Peasley (Based on PC version by Patrick Leabo, which was based on early version by JL Helms & MF Pezok, June 1979) || Freeware release (Compuserve) || January 1987 || 3 ONLY || 128K || 3, 128K RAM, cassette or disk,. || || Game || DECB || ||
|-
| [[Z-89]] || Steve Bjork (SRB Software) || Game Point Software, then SRB Software || 1989 || 3 ONLY || 128K || 3, 128K RAM, disk, joystick. || || Game || DECB || ||
|-
| [[Zaksund]] || Charles J. Roslund || Elite Software || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-
| [[Zaxxon]] || Steve Bjork || Datasoft (on their own, and through Radio Shack) || 1983 || 1,2 or 3 || 32K || 1,2,3, 32K RAM, cassette or disk, joystick. || || Game || DECB || 26-3062 ||
|-
| [[Zenix]] || Jeremy Spiller and Mike Newell || Gosub Software (Eversoft Games), and later Sundog Systems || 1989 || 3 ONLY || 128K || 3, 128K RAM, disk ONLY, joystick. || || Game || DECB || ||
|-
| [[Zone 6]] || Ottmar Bochardt || Colorquest || 1983 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk, joystick optional. || || Game || DECB || ||
|-
| [[Zonx]] || David Billen || Rainbow magazine || October 1985 || 1,2 or 3 || 16K || 1,2,3, 16K RAM, cassette or disk, joystick. || || Game || DECB || ||
|-)
|}

== More information needed ==
*[[Color It]] - Disk

==CoCo 1/2 Non-games==
*[[Art Gallery]] - Rompack, 26-3061, 1981
*[[Audio Spectrum Analyzer]] - Rompack, 26-3156, 1981
*[[Autoterm 3.2D]] - Disk, PXE Computing
*[[BASIC-09]] - Disk, 26-3036, OS-9
*[[CocoMax Hi-Res Pack]] - Rompack, Colorware
*[[Color File]] - Rompack, 26-3103, 1981
*[[Color File II]] - Rompack, 26-3110, 1986
*[[Color Pack]] - ROM/RAM Pack, Green Mountain Micro
*[[Color Scripsit]] - Rompack, 26-3105, 1981
*[[Color Scripsit II]] - Rompack, 26-3109, 1986
*[[Color Term Plus]] - Rompack, Double Density Software, 1983
*[[Colorcom/E]] - Rompack, Eigen Systems
*[[Lyra]] - Disk, Cassette, Speech Systems, Midi Sequencer for RSDOS
*[[Musica]] 1 & 2, Disk, Cassette, Speech Systems, Wavetable Music composer for RSDOS
*[[Coco Midi]] 1, 2, 3, & Pro - Disk, Rompack, Speech Systems, Midi Recorder for RSDOS
*[[Comm-4 Serial Pak]] - Rompack
*[[Diagnostics]] - Rompack, 26-3019, 1980
*[[Digisector DS-69A]] - Rompack, Microworks
*[[Display 80]] - Rompack, Disto
*[[Disto RAM Pak]] - Rampack, Disto
*[[EDTASM+]] - Rompack, 26-3250, 1982
*[[EPROM Programmer]] - Rompack, Intronics
*[[Graphic Pack]] - Rompack, 26-3157, 1982
*[[Handyman]] - Rompack, 26-3154, 1981
*[[Master Key II]] - Rompack, Computize, 1984
*[[Match Maker Spanish Vocabulary Slills]] - Disk
*[[Micro Painter]] - Rompack, 26-3077, 1982
*[[Microworks Forth]] - Rompack, Microworks
*[[Midi Interface]] - Rompack, Related Research
*[[Modem Pack - Direct Connect]] - Rompack, 26-2228, 1985
*[[Music]] - Rompack, 26-3151, 1980
*[[NewDisk]] - OS-9 Device Driver, 1985
*[[PBJ Dual Serial Port PAk]] - Rompack, PBJ
*[[P-C Pak]] - Rompack, PBJ, 1984
*[[Personal Finance]] - Rompack, 26-3101, 1980
*[[Personal Finance II]] - Rompack, 26-3106, 1983
*[[Real Talker]] - Rompack, Colorware
*[[RS 232 Program Pack]] - Rompack, 26-2226, 1983
*[[Smartwatch Pack]] - Rompack
*[[Soliddrive RAM Pak]] - RAM pack
*[[Spectaculator]] - Rompack, 26-3104, 1981
*[[Spectrum Voice Pak]] - Rompack, Spectrum Projects
*[[Speech Sound]] - Rompack, 26-3144
*[[Speech Systems large white pack]] - Rompack, Speech Systems, has 2 jacks on one side
*[[Speech Systems small black pack]] - Rompack, Speech Systems, no jacks
*[[Stereo Composer]] - Rompack, Speech Systems
*[[Stereo Music - Orch 90CC]] - Rompack, 26-3143, 1984
*[[Typemate]] - Rompack, 26-3155, 1988
*[[Typing Tutor]] - Rompack, 26-3152, 1980
*[[Video Digitizer DS69]] - Rompack
*[[Videotex]] - Rompack, 26-2222, 1981
*[[Voice, The]] - Rompack, Speech Systems
*[[Wildcatting]] - Rompack, 26-3067, 1981
*[[Word-Pak]] - Rompack, PBJ, 1983
*[[WordPak II]] - Rompack, PBJ
*[[WordPak RS]] - Rompack, Radio Shack
*[[X-pad]] - Rompack, 26-1196, 1982, comes with tablet, pen and template
*[[Z80]] - Rompack

==CoCo 3 Games==
(Sorted)
*[[Arena of Skill]] - Disk, Chuck Nivison 1988, 128k, D&D/Arcade/Strategy
*[[Barbarian Quest]] - Disk, Sportsware, 1990, Arcade, Medievel Sword Fighting. 512k Author Paul L Olmstead
*[[Bash]] - Disk, SRB Software 1989, Arkanoid(Bustout) Clone, 128k Ram. Author Steve Bkork
*[[Blox]] - Disk, Chet Simpson 1991, Based on Tetris, 1 of Chet's 1st games, 128k Ram
*[[Castle of Tharoggad]] - Rompack, 26-3159, 1988. 128k Ram, Author Scott cabit?
*[[C-Hawk Football]] - Stephen Macri 1986, 128k, Text/Graphics Football Simulation
*[[Cosmic Ambush]] - Disk, Nick Marentas 1992, Space Shooter, 128k Ram.
*[[Croid]] - Disk, Andrew Simpson 198#, Mind Strategy, 128k ram, Joystick
*[[Crystal City]] - Disk,Arcade, Gosub Software and later on Sundog Systems, 1991. 512k Ram, Lone Ship fighting to save your home planet. Author Jeremy Spiller...
*[[Championship Football]] - Rompack, 26-3172, 1988. 128k Ram
*[[Digger]] - Disk, Chet Simpson 1990-91, Lode Runner clone, 128k Ram, This game had no sound and was Chet's 1st game he ever did and released.
*[[Digger II, Return of the Saint]] - Disk, Chet Simpson 200#, Best Lode Runner Clone, 512k Ram.
*[[Digger Xmas Edition 2019]] - Disk, Chet Simpson, Better and more improved Lode Runner clone with Amiga style graphics and sounds, 512k ram.
*[[Donkey Kong]] - Disk, SockMaster, 200#, Actual Z80 Arcade Game ported to the Coco 3. 512k Ram.
*[[Donut Dilemma3]] - Disk, Nick Marentas, 2020, 128k Ram, Modified to use Joystick and some Levels are optimised, Also it has been re-coded too use Coco 3 Gime 128x192x4 colour mode and Border is now Black!!
*[[Draw Poker]] - Disk, Mike Burton 1986, 128k, Draw poker Card simulation
*[[Exeter]] - Disk, G J Doak, 1987, Graphics Adventure. 128k Ram
*[[Fruit Multi-bars Slot machine]], Tom Mix Software 1986(white Cloud Software), 128k, Slot Machine Simulation
*[[Fire One]] - Disk, Ark Royal Games 1987, 3d Submarine war simulation, 128k Ram.
*[[Frogday Afternoon]] - Disk, Kevin Humphrey, 1988, Control a Scuba Diver Fishing. 128k Ram
*[[Gate Crasher]] - Disk, Nick Marentas 1999, 1st Full 3D shooter, 512k Ram.
*[[Gems]] - Disk, John R Strong 1991, Tetris Clone, 128k Ram, This uses the Orch 90cc Rompack.
*[[Gold Runner 2000]] - Disk, Chet Simpson 1999, Best Lode runner Clone for the Coco's, 512k Ram
*[[Gantelet2]] - Disk or Tape, Diecom Products, 1987. 128k Ram, only game for the coco 3 that allowed up too 4 players at once 2 on joysticks, 2 on Keyboards
*[[Grandprix Challenge]] - Disk or Tape, Diecom Products Inc, 1987. 128k Ram
*[[Gunstar]] - Disk, 6309 Cpu Only, Nick marentas 2020 512k Ram, You are Earths only Hope flying Solo to fight the invaders at their home planet, World Premier was on CocoTalk Mar2020
*[[Iron Forest]] - Disk, Diecom 1988, 1 of only 2 that used the Sega Phaser gun. 128k Ram.
*[[Jeweled]] - Disk, Roger Taylor 2008, Bejeweled Clone, 512k Ram. Background Music and smooth joystick positioning.
*[[Kyum Gai to be ninja]] - Disk, Sundog Systems, 1989, Side Software scrolling Ninja Fighting Game. 128k Ram, Author Glen Dalhgren...
*[[La Belle Lucie Solitaire]] - Disk, EverSoft Games 1990, Card Game, 128k Ram.
*[[Lunar Lander]] - Disk, Jeff Donze Rainbow Magazine 1989, Simulation of landing a Space Capsule on the Moon
*[[Mary's Butterflies]] - Disk, Roger Taylor 200#, Unique game style, 128k Ram.
*[[Malcom Mortar]] - Rompack, 26-3160, 1987. 128k Ram, Author Greg Zumwalt
*[[Marty's Nightmare]] - Disk, SRB Software 19##, Pac Man Style game, 128k Ram. Author Steve Bjork, loosely based on Pac-man type visuals and game play.
*[[Magic of Zanth]] - Disk, Computerware 1987, Graphics Adventure, 128k Ram. Author Scott Cabit?
*[[Medievel Madness]] - Disk, Diecom 1989, 2nd game to use the Sega Phaser gun. 128k Ram.
*[[Mine Rescue]] - Disk, SRB Software 1988, Rescue trapped miners, 128k Ram. Uses the same game system used in Super pitfall, Author Steve Bjork
*[[MindRoll]] - Rompack 128k Ram, Tandy/Radio Shack 1989, Author of coco version Jesse Taylor, Keyboard or Joystick(optional)
*[[Moon Defense]] - Disk, Robert Evans 1987, 128k, Simple Space Fighting game
*[[Neutroid 2.015]] - Disk, Nick Marentas 2015, 128k Ram, Arcade/Strategy when run on a Coco 3 it uses 128k Ram, on other systems it would be 64k?
*[[Nuke the Love Boat]] - Disk, 128k, Computerware 1987, Graphics Adventure, Stop a Terrorist plan to Nuke a Luxury Cruise Ship
*[[Overlord]] - Disk, Oblique Triad, 1990, Wargames Role player game. 128k
*[[Pac Dude]] - Disk, Brian O'Neill 1990, Clone of Pac Man. 128k Ram.
*[[PacDude Monster Maze]] - Disk, Brian O'Neill 1992, Music by Chris Spry. 512k Ram. 1 of the best Hybrid pac-man clones on the coco 3 based on Pac mania for the Amiga
*[[Pac Man]] - Disk, Nick Marentas 1997, Best Pac Man Clone ever on the coco's, 512k Ram.
*[[Pelieti]] - Disk, Roger Taylor 1991, Maze style solving, 128k Ram.
*[[Photon]] - Disk, Sundog Systems, 19##, Arcade Mind Strategy game. 128k Ram. Game Author Jeff Steidle.
*[[Picture Puzzler]] - Disk, Jr&Jr Software, strategy mind game, 128k Ram, 19##
*[[Ponk]] - Disk, Greg Helton 1987, Based on the 1970's Squash Simulation
*[[Popstar Pilot]] - Disk, Nick Marentas 2016, Side Scrolling 80 Screens worth of Arcade quality Shoot them up, 512k Also This is a game that looks NES or Sega like in visuals and game play in my eyes.
*[[Predator]] - Rompack, 26-3165, 1989. 128k Ram, Coco 3 version by Greg Zumwalt
*[[Pursuit]] - Disk/Tape, Tandy Australia Craig Stewart, 1987. 128k Ram
*[[Pyramix]] - Disk, Dr Prebbles programs, 1987. 128k Ram
*[[RAD Warrior]] - Rompack, 26-3162 Jesse taylor for Epyx, 1987. 128k Ram, I find it too be one of the best Ports Jesse did for the coco.
*[[Rampage]] - Tandy/Radio Shack Rompack, 26-3174, 1989. 128k Ram, Author Steve Bjork.
*[[Return of Juniors Revenge]] - Disk, ComputerWare BJ Chambless 1986, Based on Donkey Kong Jr, 128k Ram.
*[[Revenge of the Mutant Miners]] - Disk, Jr&Jr Software, 198#, 128k ram, Based on 2049 miner found on other 8 bit systems
*[[Roller Controller]] - Disk, Spectral Associates 1986, Game theme unknown, 128k Ram.
*[[Robocop]] - Rompack, 26-3164, 1988. 128k Ram, Coco 3 Author Greg Zumwalt
*[[Rupert Rythym]] - Disk or Tape,Nick Marentas (Tandy Australia), 1988. 128k Ram
*[[Slots and Cards]] - Disk, Microdeal, 19##, Vegas slot cards. 128k Ram
*[[Sidney, The Super Space Snake]] - Disk, KLG Systems, 1991, 128k Ram
*[[Seventh Link]] - Disk, Oblique Triad, 1990,RPG Graphics Adventure. based on the Ultima style games
*[[Shanghai]] - Rompack, 26-3084, 1987. 128k Ram, Author Rick Adams certain joystick position on main screen activates alternate color scheme.
*[[Silpheed]] - Rompack, 26-3054, 1988. 128k Ram
*[[Sinnstaar]] - Disk, Sundog Systems, 1989, Space Shoot'n up Game. 512k Ram, Dave Dies under the Phantasm Software banner
*[[Soviet Bloc]] - Disk, John R Strong 1991, Tetris Clone, 128 Ram, Also uses Orch-90cc Rompack.
*[[Space Intruders]] - Disk, Tandy Australia, 1988. 128k Ram, Based on Space Invaders and best Clone to date on any 8bit system, Author Nick Marentas..
*[[Space Marauder]] - Disk, Tandy Australia Craig Stewart, 1987. 128k Ram
*[[Spider Hype and Spider Hyper]] - Disk, Roger Taylor 1992, Trap Spiders in Bottom Half, 128k Ram. 2 versions are made 1 uses 6809 the other uses 6309 chips.
*[[Springster]] - Rompack, 26-3078, Spectral Associates 1987. 128k Ram
*[[Super Pitfall]] - Rompack, 26-3171, 1988. 128k Ram
*[[Super Pitfall 6309 Optimised ]] - hacker Author Unknown, Disk, Game Author SRB(Steve Bjork 1988) RomPack Version, 512k Ram
*[[Super Mastermind]] - Disk, Bill Nobel and Darryl Hildebrandt 1987, Simulation
*[[Sweep]] - Disk, Tim Franklin 2011, 128k, Puzzle game based on Mine Sweeper
*[[The Power Stones of Ard 1]] -Disk, 3 C's Projects, 1988-1989, Graphics Adventure, 128k Ram
*[[The Power Stones of Ard 2]] - Disk, 3 C's Projects, 1990, Graphic adventure, 128k Ram
*[[Those Darn Marbles]] - Disk, Oblique Triad, 1990, based on marble maze. 512k Ram
*[[The Quest for Thelda]] - Disk, Sundog Systems, 1991, Clone of Zelda. 128k Ram
*[[The Quest For The Starlord]] - Disk, Sundog Systems, 198#, graphic adventure, Futuristic Apocalypse game. 128k Ram
*[[The Contras]] - Disk, Sundog Systems, 1991, Commando Clone. 512k Ram
*[[Thexder]] - Rompack, 26-3072, 1987. 128k Ram
*[[Three in a Row]] - Charles Price 198#, Tic Tac Toe simulation 128k Disk
*[[Trubble]] - John Demchenko, Disk 128k, Game theme Unknown?
*[[Tetra]] - Disk, Brian O'Neill 1991, Based on the game Tetris, 128k Ram.
*[[Vegas Slots]] - Disk, Tom Mix Software, 1987. 128k Ram
*[[Video Cards/Keno]] - Disk, Tom Mix, 1988, Vegas Casino Game. 128k
*[[WaterFall]] - Disk, Nick marentas 2019, Arcade. Based on Man Goes Down on Atari VCS, This version is for all 3 coco's 1,2 and 3
*[[Warp Fighter 3-D]] - Disk, Steve Bjork's 3-D space shooter, also can use 3D Glasses. 128k Ram
*[[Warrior King]] - Disk, Sundog Systems, 1988, Medievel Sword game. 128k Ram
*[[WarMongar]] - Disk, Sundog Systems, 1991, World Domination style Game, The Author of the game, Greg Wittmeyer(GSW Software). 128k Ram
*[[Wildwest]] - Disk, Tom Mix 1987, Graphics Adventure, 128k Ram.
*[[World At War]] - Disk, GSW Software, This game was revised, And then Sold By Sundog Systems, Which is the game renamed WarMongar, But with some enhancements. 128k Ram

*[[Z-89]] - Disk, Game Point Software, 1989, Sequel to Zaxxon(utilising the power of the coco 3) 128K Ram. Steve Bjork
*[[Zenix]] - Disk, Jeremy Spiller, 1990, clone of Galaga. 128k Ram, Background music and 32 game levels and level 33 is the alien hordes Home Planet....

OS-9 Level 2 or Nitros-9 Based Games

*[[Kings Quest 3]] - Disk Os-9 Lv2 512k Sierra On-Line for Tandy Usa, 512k Graphics adventure
*[[Koronis Rift]], Disk OS-9 Lv2, Ken Rogoway (Lucasfilm Ltd., for Epyx), 1987, Arcade/Strategy as of
*[[Kyum Gai]] - Disk, Sundog Systems, 1991, OS9 version of To be ninja. 256k or 512k needed
*[[Leisure suit Larry]] - Chris Iden (Coco/OS-9 conversion) Sierra On-Line 1988, 256 or 512k, Graphics/Adventure
*[[Rescue on Fractulas]] - Ken Rogoway (Lucasfilm Ltd., for Epyx), 128k Disk, Rescue Stranded people while being fired upon. Curtis Boyle has done a 6309 updated version with much quicker frame rate in the YR2020
*[[Rogue]] - Disk, 26-3297, 198?. 128k Ram Minimum 512k Ram needed for Ascii graphics
*[[Shanghai]] Rick Adams (Activision) (cartridge original), and Bill Nobel/Alan Dekok (OS-9 version) 256/512k Disk
*[[Sub Battle Simulator]] - Disk, Jesse Taylor & Mike Leber for Epyx, 1987, 128k
2 other games to be entered in here yet will do when time permits :)

==CoCo 3 Non-games==
*[[512K SIMM Upgrade]] - Disk, Cloud-9
*[[ADOS-3]] - Disk, SpectroSystems
*[[Coco3 Utilities]] - Disk, Color Venture
*[[CocoMax III]] - Disk, Colorware
*[[Color Computer Artist]] - Disk, 26-3277
*[[512k Basic]] - Disk, Microcom Software, 1988.
*[[WPShel]] - Disk, OS9 Word Processing shell, Colorsystems, 1990.
*[[Disk Defeater]] - Disk, Rsdos, Break any copy protection used,Carl England, 1995
*[[Backup Magic]] - Disk, Rsdos, Backup any copy protected coco disk on the Market, And can make a emulator running version for DK's and Mess. Carl England, 2005
*[[SuperDisk]] - Disk, Rsdos, Sportsware, 198# Look at How programmers create their own copy protection schemes, Even learn to make your own.
*[[CoCo Family Recorder]] - Disk, requires 80 column monitor and two disc drives. Geneaology database program. Versions for SECB (RS-DOS) and OS-9 were available. FARNA Systems, 1992 - OS-9 version 1995.
*[[Ultilmuse III]] - Disk, Os-9 Level 2 MIDI Sequencer by Michael J.Knudsen.

==CoCo 1/2 Operating Systems==
*[[OS-9 Level One]] - multitasking in a single 64K address space.
*[[Flex]] - single tasking OS whose command prompt got Hayes modems' attention.
*[[ADOS]] - single tasking OS edition enhancements, Slow & Fast compatible with disk and printers

==CoCo 3 Operating Systems==
*[[OS-9 Level Two]] - multitasking with memory mapping and windowing.
*[[NitrOS-9]] - A supercharged, open source version of OS-9 for the CoCo

==Links==
* [http://www.lcurtisboyle.com/nitros9/coco_game_list.html lcurtisboyle list]
* [ftp://maltedmedia.com/coco/SOFTWARE/Games%20COCO%20Info%20Curtis%20Boyle%20Make%20By%20Luis%20Fernandez.xls in Excel]
* [http://aaronwolfe.com/robert.gault/Coco/Unpublished/CART2RAM.html Transferring Coco Pak Software to Disk by Robert Gault]

== Sources ==

* [http://www.lcurtisboyle.com/nitros9/coco_game_list.html L. Curtis Boyle CoCo games list] used with permission - special thanks to L. Curtis Boyle for this list and reviews
* [http://www.icepeople.net/coco/reviews.html The Color Computer games review page]
* Radio Shack paper catalogs - all available at https://www.radioshackcatalogs.com

{{CatSoftware}}

Internet Resources

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MagicFab: /* Buy & sell */

Internet Resources

2022-07-26T21:00:27Z

MagicFab: /* GEnie Online Service */ moved to its own new page for archival

GEnie Online Service

2022-07-26T20:59:58Z

MagicFab: New page moved from Internet resources for archival

Here is a list of CoCo and OS-9 files once hosted on the GEnie online service, long gone now of course. An interesting historical project would be to compare this list with the Delphi archives and those of Compuserve, if such a list can still be found or re-constructed.

*[[GEnie CoCo Files]] and [[GEnie CoCo Files Browse Listing]]
*[[GEnie OS-9 Files]] and [[GEnie OS-9 Files Browse Listing]]
*[[GEnie OSK Files]] and [[GEnie OSK Files Browse Listing]]
*[[GEnie Tandy Programming and High-res Graphics]]

Internet Resources

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MagicFab: /* Delphi Online Service */ moved to its own page

{{NavInternetResources}}

== Web sites ==

* See [[CoCo_Links]]

== Buy & sell ==
* A number of [https://www.cocopedia.com/wiki/index.php/Companies companies and individuals] still develop and sell new software and products for the CoCo
* [https://www.facebook.com/groups/199823804132260 CoCo Marketplace] on Facebook
* [https://discord.com/channels/301741082600013824/481172251014725634 #buy-sell-trade channel] on Discord
* Other websites - search for TRS80, Tandy and Radio Shack on these for better results
** [https://ebay.com eBay]
** [https://www.facebook.com/marketplace/ Facebook marketplace]
** Local online classified ads (eg. [https://kijiji.ca Kijiji] in Canada

== Web Forums/Message Boards ==
* [https://www.facebook.com/groups/2359462640 TRS-80 Color Computer (CoCo)] group on Facebook - English, US-centric
* [https://www.facebook.com/groups/cococanada Ordinateur Couleur TRS-80 Colour Computer (CoCo) Canada] group on Facebook - English / French, for Canada
* [https://www.facebook.com/groups/ClubeColor/ Clube Color] group on Facebook - Brazilian portuguese
* [https://www.facebook.com/groups/1929079184021683/ Tandy Color Computer OS-9 / NITROS-9] group on Facebook
* Roger Taylor message board (still active?)

== Chat ==
* [https://discordapp.com/invite/4J5nHXm Tandy Color Computer (CoCo) Discord Chat] - age verification required
* [https://matrix.to/#/#retrobytes:matrix.org RetroBytes CoCo community on Matrix] - Spanish, French and English channels
* #coco_chat IRC channel on [https://web.libera.chat/ Libera.chat]

== E-Mail Mailing Lists==
* [http://five.pairlist.net/mailman/listinfo/coco/ The MaltedMedia mailing list or CoCoList] - You can subscribe by visiting the web page and filling the subscription form.
* The <code>gmane.comp.hardware.tandy.coco</code> newsgroup on the <code>news.gmane.io</code> NNTP server - a mail-to-news gateway for the MaltedMedia mailing list, accessible through NNTP client software such as [https://www.thunderbird.net Thunderbird]. You can also use this link on some news clients: <code>news://news.gmane.org/gmane.comp.hardware.tandy.coco</code>. ''Note :''
** Postings to the gmane newsgroup are automatically spam-checked.
** Email addresses on the group are also encrypted, so private email may only be sent by subscribers and email addresses will not be harvested.

== FTP File Archives ==
*[ftp://os9archive.rtsi.com/ The OS-9 and CoCo file archive at RTSI.com]
*[ftp://maltedmedia.com/coco/ FTP site associated with the Maltedmedia CoCo mail list, run by Dennis Kitsz]

== Archived resources ==
*[[Delphi Online Service]]

== GEnie Online Service ==
Here is a list of CoCo and OS-9 files once hosted on the GEnie online service, long gone now of course. An interesting historical project would be to compare this list with the Delphi archives and those of Compuserve, if such a list can still be found or re-constructed.

*[[GEnie CoCo Files]] and [[GEnie CoCo Files Browse Listing]]
*[[GEnie OS-9 Files]] and [[GEnie OS-9 Files Browse Listing]]
*[[GEnie OSK Files]] and [[GEnie OSK Files Browse Listing]]
*[[GEnie Tandy Programming and High-res Graphics]]

[[Category:Internet Resources]]

Delphi Online Service

2022-07-26T20:58:41Z

MagicFab: New page moved from Internet resources for archival

Lists of files from the OS-9 6809 and 68K file archives on the Delphi information service. These archives are no longer extant. Perhaps this wiki can serve as a way to organize the preservation of Color Computer history. Files on these lists that are preserved at RTSI.com can be marked, and those who have copies of files that aren't preserved can upload them so they are not lost to history. Only the OS-9 sections are cataloged here at this time. Please contribute lists of RSDOS files if you have them.

*[[New (as of 9/3/1996)]]
*[[General Info]]
*[[6809 System Modules]]
*[[6809 Applications]]
*[[6809 Telecommunications]]
*[[OSK System Modules]]
*[[OSK Applications]]
*[[OSK Telecommunications]]
*[[Games and Graphics]]
*[[Music and Sound]]
*[[Programming]]
*[[Standards]]
*[[Tutorial]]
*[[OS-9 User Group]]

CoCo Links

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MagicFab: /* = Podcasts */ fixed header

{{NavHome}}
[[Image:3Mugateers.GIF|right|The Three Mugateers]]

CoCo is the nickname given to the Radio Shack TRS-80 '''Co'''lor '''Co'''mputer.

== CoCo Related Links==
=== Podcasts ===
* [http://cococrew.org/ The CoCo Crew Podcast] - a monthly podcast
* [http://cocotalk.live/ CoCo Talk Live] - a weekly live talk show broadcasting on YouTube and Facebook

=== Magazines, Documentation & Reference ===
*[http://en.wikipedia.org/wiki/Tandy_Color_Computer TRS-80 Color Computer Wikipedia Page] - A rather well done information page on just what a CoCo is.
*[https://archive.org/details/rainbowmagazine The Rainbow (TRS-80 Color Computer Magazine)] - the complete collection of scanned magazines in PDG format at archive.org
*[http://cococoding.com/ CoCo Coding] - Massive Color Computer programming and documentation repository.
*[http://www.colorcomputerarchive.com/ TRS-80 Color Computer Archives] - A wealth of Coco software in organized directories. Most sofware for the Coco can be found here as well as manuals and magazines.
*[http://www.vavasour.ca/cfdm/ Coco Friends Disk Magazine] - A web version of back issues of "Coco Friends Disk Magazine"

== Software tools & projects ==
* [http://lost.l-w.ca/coco/lwtools/ LWTools]- is a set of cross-development tools for the Motorola 6809 and Hitachi 6309 microprocessors.
*[http://users.axess.com/twilight/sock/ Sock Master's CoCo Page] - Home of CoCo's Donkey Kong Emulator, Twilight Term, mind-blowing CoCo demos such as CocoTracker (Coco Mod player) and much more.
*[http://www.cocoquest.com/ CoCo Quest] - Home of Mike Snyder's CoCo games.
*[http://sites.google.com/site/dabarnstudio/ Da Barn Studios] - A site dedicated to the software projects of Bill Pierce as well as Music from the Tandy/Radio Shack Color Computer 1, 2 & 3.
*[http://sourceforge.net/projects/nitros9/ NitrOS-9 on SourceForge] - The open source operating system for all CoCo's and Dragons. Great documentation in the wiki.
*[http://sourceforge.net/projects/toolshed/ The Toolshed] - Great set of tools including a 6809 assembler, utilities for managing disk images, and much more.
*[http://sites.google.com/site/drivewire4/ JAVA based DriveWire 4 by Aaron Wolfe] - Opens the CoCo to new features and worlds, with virtual drive access from your PC, DW4 MIDI for the Coco, OS-9 terminals, and much, much more!
*[http://members.optusnet.com.au/nickma/ProjectArchive/index.html Nickolas Marentes' Project Archive] - Nick's page includes information on all his CoCo projects and programs, interviews, software downloads and interesting information about the CoCo 3's (still) elusive 256 color mode.

=== Hardware vendors ===

See [[Companies#Current_Vendors_List]]

=== Organizations ===
* [http://glensideccc.com/ The Glenside Color Computer Club Page] - a non-profit organization holding regular meetings, also the CoCoFest organizer

=== Hardware ===
*[http://www.trs-80.com/wordpress/orch80/ Ira Goldklang's TRS-80 Revived Site] - Ira's TRS-80 site with pages devoted to the Orchestra 80/85/90.

=== Blogs, informational and personal websites ===

* [https://sites.google.com/site/tandycocoloco/home Tandy CoCoLoCo]
* [http://www.lcurtisboyle.com/nitros9/ NitrOS9.LCURTISBOYLE.COM] - A set of Coco 1/2/3 web pages by L. Curtis Boyle on NitrOS-9.
* [http://alsplace.os9al.com/subetha.html Al's Place] - The Home and history of Sub-Etha Software. A lot of info on Coco and OS-9.
* [http://cocomc10.pereanet.com/ Yet Another Coco & MC-10 Site] - Dedicated to the Tandy/Radio Shack MC-10 Micro Color Computer and the Color Computers 1, 2 & 3.
* [http://www.vavasour.ca/jeff/trs80.html Jeff Vavasour's TRS-80 EMULATION Page] - The first Color Computer Emulator. Jeff's TRS-80 emulation is good stuff. All MSDOS based, so modern computers need a DOSBox to run the emulators.
* [http://archive.worldofdragon.org/index.php?title=Main_Page The Dragon Archive] - This page contains links to various resources related to the Dragon 32 and Dragon 64 microcomputers.
* [https://sourceforge.net/projects/vcce/ Virtual Color Computer (Vcc)] - the VCC Color Computer 3 Emulator for Windows download page. This is the last official release by the author.
* [http://cocoman.org/ Coco Man's Webpage] - This Page Deticated to the Tandy/ Radio Shack Color Computer "COCO".
* [http://users.digitalindigo.net/~techno/coco.html Techno's CoCo Page] - Lots of interesting information about the various models of the CoCo, including pictures.
* [http://iloveglory.freehostia.com/daggorath/index.html The Dungeons of Daggorath Video Game] - A page devoted to the classic CoCo game, considered by many to be one of the best games of all time!

== To be reformatted as archive.org cached sites ==

*[http://coco3.com/ The TRS-80.Tandy Color Computer Supersite] - No longer active and full of SPAM, but use the search engine to find lots information for the CoCo.
*[http://tandycoco.com/ CoCo News, Reviews & Updates] - CoCo commentary with news and hardware and software reviews.
*[http://tandycoco.com/forum/ The Color Computer Forums] CoCo Enthusiast Forum pages.
*[ftp://www.rtsi.com/OS9/OS9_6X09/ RTSI OS9 Archive] - The exclusive archive of OS9 software and tools.
*[ftp://www.rtsi.com/RSDOS/ RTSI RSDOS Archive] - The archive of RSDOS software and tools.
*[http://www.cs.unc.edu/~yakowenk/coco.html Color Computer Stuff] - SO, WHY ARE RADIO SHACK COLOR COMPUTERS SUDDENLY COOL?
*[http://coco.etechwds.com/ Life and Times of the Color Computer] - Steve Bjork's homepage. I wish Steve would get back to work on the Coco 4 project.

[[Category:Help]]

Color Computer 2

2022-07-24T12:10:32Z

MagicFab: /* 26-3126 (64K, ECB) CoCo 2 kit */ added references

[[File:Coco2.Gif|thumb|Color computer 2]]

= Models =

The CoCo2 was first released in September of 1983.

* CB = Color Basic
* ECB = Extended Color Basic

== 26-3026, 26-3026A, 26-3026B model (16K CB ) - September 1983 ==
The first CoCo 2 model released included 16K RAM with standard Color BASIC and was listed in Radio Shack catalogs at U$239.95. The case was a bit smaller than the original CoCo, very similar to the TDP-100. The keyboard was much better than the original CoCo "chicklet" keyboard. They were lower profile than typical modern PC keyboards and the keys were recessed in the center, giving them a "melted" look - a term now used to describe this model.

The circuit boards were revised to be a bit smaller than previous models and were equipped to run a full 64K. Most of its chips are socketed. This machine is based on the #8709416 PC board, and has a large, upright RF modulator with integrated TV channel 3/4 switch.

Also characteristic of this machine is the use of a large power supply pass transistor (in a TO-3 package). The two 24-pin ROM sockets are located near the cartridge/system bus connector, and the eight RAM chips are located in a single row under the keyboard.

This same model number has reportedly been found on larger, Korean-made CoCo models in Australia.

There are two possible versions (and 'A' and 'B') for this catalog number.

== 26-3027 (16K ECB), 26-3003 (64K ECB) ==
This 16K ECB model was listed for $319.95, $399.95 for 64K. A 64K RAM upgrade (26-3017/26-3017B) was "only" $149, and the Extended BASIC ROM upgrade (26-3018) was $79.95, making the $399.95 26-3003 a relative bargain (add the ROM and RAM upgrade to a 16K basic model the total price was $468.90).

The 26-3027 model is identical to the 26-3026, with the exception that it already has the Extended BASIC ROM factory-installed.

There are two possible versions (and 'A' and 'B') for the 26-3027 catalog number.

=== RAM upgrade ===

To upgrade the 26-3026 or 26-3027 to 64 KB of RAM, it is necessary to replace the eight 8040517 chips with 4164 chips of 200 ns or better access time, and to solder a wire between the two pads labelled W1. W1 is located between U6 and U7.

Example documented upgrades :
* [https://www.st-hubert.org/phase2/truepages/elec0006.html 26-3026 model 16K to 64K upgrade]

== 26-3126 (64K, ECB) CoCo 2 kit ==

This particular model was sold as the "Color Computer 2 Kit" in the educational market as a kit of parts to be assembled. It included a booklet with full instructions to assemble the kit into a full CoCo 2 system, including the board and all electronics parts but also power supply, keyboard and complete white plastic case.

* https://www.facebook.com/groups/2359462640/posts/10153646511017641/
* https://www.facebook.com/groups/2359462640/posts/10159470040357641/

== 26-3127 (64K, ECB), 26-3127B ==

This is the first '64K Color Computer 2'. It also featured the 'enhanced' keyboard, otherwise, it is identical to the 26-3026/26-3027.

=== RAM replacement ===

Note that the RAM is soldered in place in those machines which were factory-equipped with 64K, making replacement thereof a bit more difficult if necessary. For this reason, the 26-3026 and 26-3027 variants are favorites among CoCo 2 enthusiasts.

== The Korean-made CoCo 2s ==

=== 26-3134 (16K CB), 26-3136 (16K ECB) ===

The 26-3134 model is the first Korean-made 16K Color BASIC CoCo 2. It uses the #20261043 circuit board, which differs considerably from that used in the earlier USA-made models. Virtually every component on the board has been relocated. The RF modulator is now a smaller unit, lying flat on the board rather than standing upright, and the channel 3/4 switch has been moved to the main board from the modulator. The positions of the various switches and connectors on the PC board (and therefore on the rear panel) differ from those of the previous machines as well. The RAM chips are located in two rows (one of five and one of three chips).

This machine has a metal 'cage' surrounding the power transformer, which was not present in previous models. The power supply utilizes a cooler-running pass transistor (in a TO-220 package). The RF modulator, power transformer, pass transistor, and switch/jack location characteristics of this machine persist on all subsequent models. Most chips are soldered in place on this and all subsequent boards as well.

The 26-3136 model is identical to the 26-3134, but with the Extended BASIC ROM factory-installed.

=== 26-3134A (16K CB 1.3), 26-3136A (16K ECB) ===

The 26-3134A model is the next Korean 16K Color BASIC CoCo 2. It utilizes a #20261044 circuit board, which differs considerably from the previous versions.

The 26-3136A model is the 16K Extended BASIC version of the 26-3134A.

==== ROM upgrade ====
The 26-3134A model board's ROM design has yet to be confirmed.

The 26-3136A model uses a single 28-pin, 16-kilobyte ROM containing both Color BASIC and Extended BASIC.

=== 26-3134B (16K CB 1.3), 26-3136B (16K ECB) ===

The 26-3134B model is the last Korean 16K Color BASIC model. It uses the #20261058 circuit board, which is similar to the #20261044 board. It uses two 4416 RAM chips and a 24-pin Color BASIC 1.3 ROM in a 28-pin socket as well. However, in addition to the 4416/4464 sockets and special daughter board connectors, there are pads on the board allowing direct factory installation of eight 4164 chips. This is also the board which contains the newer 6847T1 VDG chip (which is not pin-compatible with the earlier 6847).

The 26-3136B model is the Extended BASIC version of the 26-3134B.

=== 26-3127B (64K ECB ) (some with lowercase support) ===

The last Korean-made model number associated with the 64K ECB CoCo 2, this is an odd one indeed.

Some of the 26-3127B CoCo 2 models are known to have been produced with different Video Display Generator (VDG) chips, either the [[Motorola 6847|Motorola MC6847 or the enhanced MC6847T1]] (marked XC80652P, [https://colorcomputerarchive.com/repo/Documents/Datasheets/MC6847T1%20MOS%20Video%20Display%20Generator%20%28Motorola%29.pdf#page=23 spec sheet]). In comparison, the CoCo3 does not have a real 6847, it has a custom chip (the ACVC) with an internal character generator ROM.

Among these models we find :
* A USA-made TRS-80 with a #20261044 board and a 6847
* A USA-made Tandy with a #20261058 board and a 6847T1
* A Korean-made Tandy with a #20261058 board and a 6847T1.

They were three distinctly different machines, each bearing this same exact 26-3127B model number. This VDG chip is also known as the 6847 or 6847T1, the T1 version would include a lowercase character set.

Contrary to some rumors, the presence of the 'B' in the model number does NOT necessarily indicate the presence of a 6847T1. As noted previously, the Tandy label appears to be the best external indication thereof.

One absolutely accurate method of determining if one is present is to type a '0' (zero) on an operating machine. If the resulting character on the screen is displayed with a slash through it, the machine in question has a 6847T1.

* [https://bigcode.wordpress.com/2020/05/09/tandy-coco-2b-true-lowercase-fonts/ Tandy Coco 2B true lowercase fonts]
* [https://stardot.org.uk/forums/viewtopic.php?f=44&t=22505 6847t1 Font Mystery]
* [https://damieng.com/blog/2016/08/09/typography-in-bits-for-a-few-pixels-more/ Typography in bits: For a few pixels more]
* [http://www.cocovga.com/documentation/system-identification/korean-made-coco-2-identification/ Korean-Made CoCo 2 Identification (either 6847 or 6847T1)]

=== RAM upgrades for Korean models ===

These 64K RAM upgrade notes apply to 26-3134A, 26-3136A, 26-3134B, or 26-3136B models ONLY.

The board's RAM is in the form of two socketed 4416 chips. The preferred 64K upgrade these models involves replacing them with two 4464 chips of 200 ns or better access time and to solder a jumper across the two pads labeled RAM SIZE 64K. The RAM SIZE 64K jumper is located next to IC4.

For the 26-3134A model the option also exists (by means of several special connectors on the board) of a factory upgrade consisting of eight 4164 chips on a daughter board. Legend has it that the option of using either 4164s or 4464s was incorporated for economic reasons (the pricing and availability of RAM were quite unstable when these machines were manufactured). Additionally, this board introduces the use of a single 28-pin ROM socket. A 24-pin ROM containing only Color BASIC 1.3 shipped in that socket in this model. With appropriate jumpering, this socket is able to accept a 27128 EPROM.

= Pricing =
Prices dropped quickly. In mid 1984 RS cut the price for the 16K standard model to $159.95 and the 16K Extended BASIC model to $199.95. Production then shifted from Tandy's US plant to a Korean subcontractor. Those models appeared in mid 1984 at the same prices as the previous models, with new model numbers and revised circuit boards. For Christmas 1984 prices were reduced -- $99.95 for a standard Color BASIC 16K model (31-3134), $139.95 for 16K and Extended Color BASIC (31-3136), and $199.95 with 64K and Extended Color BASIC (31-3127). Prices continued to drop as the home computer market got very competitive and IBM PC clones started coming down in price.

To put these prices in perspective, the new for 1985 Tandy 1000, which was an IBM PC clone (actually an enhanced IBM PC Jr. clone that could be upgraded to standard IBM PC specs) was listed at $1199 with 128K RAM and a single 360K floppy drive. An RF modulator could be purchased ($24.95) to use a standard TV as a display (limited to 40 columns) or a digital $159.95 monochrome/$549.95 color monitor could be used. The CoCo 2 was a relative bargain, although there were a few IBM clones that could be purchased a bit cheaper than the Tandy 1000. In 1987 the Tandy 1000SX was priced at $849 with 384K of RAM and one 360K floppy drive.

The final CoCo2 was listed in the 1987 Tandy catalog for only $99.95 with 64K and Extended Color BASIC.

= Differences =
[http://users.digitalindigo.net/~techno/coco2.html Extracted from]
The CoCo 2, introduced in 1983, is basically a refinement of Radio Shack's original TRS-80 Color Computer. It utilizes a more efficient power supply, higher integration (lower parts count), and a smaller case. The primary goal of these modifications was most likely to lower its manufacturing cost. The only significant functional difference between the two is the absence in the CoCo 2 of a regulated +12VDC power supply. One of the few devices which actually requires this power source is the first-generation floppy disk controller sold for the original CoCo. All subsequent controllers operate exclusively from the +5VDC line.
The CoCo 2 was initially offered with 16 kilobytes of RAM, with the option of upgrading it to 64 kilobytes. Doing so requires considerably less effort than in previous models (typically replacing the RAM chips and soldering one jumper).

While the original CoCo used a keyboard with small, flat, square keys (usually referred to as the 'chicklet' keyboard) and a gray-colored case, the CoCo 2 brought with it a more 'modern' off-white case and a keyboard with 'sculptured' keys. Some describe these early CoCo 2 keyboards as having keys which appear to be 'melted'. The travel distance of said keys is fairly low, as with the chicklet keyboard.

= Upgrading your CoCo 2 =

'''CAUTION! DO NOT ATTEMPT TO UPGRADE ANY CoCo RAM OR ROM WITHOUT FIRST SECURING SPECIFIC UPGRADE INSTRUCTIONS FOR YOUR MACHINE!'''

Please note that improper upgrade attempts have been known to destroy the majority of the chips in a CoCo!

== RAM ==

Note also that the RAM chips used in the 16K CoCo 2 are not the 4116s which one might have expected. The 4116 requires additional power supply voltages not supplied by the CoCo 2. Therefore, a special 16K by 1 bit RAM chip requiring only +5VDC is used. This chip has the Tandy house number 8040517.

The RAM used in most 64K CoCo 2s consists of standard 4164 chips.

CoCo 2 RAM upgrade information may be found below in the sections specific to each 16K CoCo 2 version.

== ROMs ==

Like the original Color Computer, the CoCo 2 has provisions for two ROMs. Each consists (in most cases) of 8 kilobytes of data in a 24-pin ROM chip :

* '''Color BASIC'''
The Color BASIC ROM is present in every CoCo. It contains the minimal BASIC interpreter and necessary routines to drive the machine's keyboard, video circuitry, and I/O ports. Most CoCo 2s use version 1.2 of the Color BASIC ROM (the two ROM versions are independent). A Color BASIC machine displays its Color BASIC version at powerup.

* '''Extended Color BASIC'''
The optional Extended BASIC ROM adds extra graphics commands and other assorted functionality enhancements. Extended Color BASIC (the composite of both ROMs) is also required in order to utilize a floppy disk controller on a CoCo. Extended CoCo 2s use version 1.1 of Extended BASIC (the two ROM versions are independent). An Extended Color BASIC machine displays its Extended BASIC version.

Those machines which shipped without the Extended BASIC ROM could be upgraded (in most cases) simply by plugging the expansion ROM into the appropriate empty socket. The remaining machines shipped with the ROM already in place.

The BASIC command 'EXEC 41175' will display the Color BASIC ROM version in an Extended Color BASIC machine.

== Keyboards ==

Before long, Radio Shack began to offer an additional model of the CoCo 2: one with Extended Color BASIC and 64 kilobytes of RAM already installed. This machine also shipped with a newly-designed keyboard, with greater key travel than either of the previous styles. Every new CoCo 2 began to ship with this new, 'enhanced' keyboard. Note that late-model CoCo 1 chicklet keyboards, all CoCo 2 keyboards, and even CoCo 3 keyboards use the same type of mylar ribbon cables and are interchangeable.

The CoCo 3 keyboard (and some third-party designs) utilize previously-unused positions in the CoCo's keyboard matrix, adding several new keys. Appropriate software can make use of the extra keys on any CoCo model. Note that the style (appearance, key travel, etc.) of the CoCo 3 keyboard is identical to that of the later CoCo 2 keyboard, with the exception of its extra keys.

== Labels as an indication of model differences ==

Radio Shack switched, during the production of the CoCo 2, from the use of the 'TRS-80' label to the 'Tandy' label on its computer products. For this reason, the CoCo 2 can be found with either label. The vast majority of samples seen and possessed by the author display the TRS-80 label. The Tandy label appears to coincide accurately with yet another variation among CoCo 2 models: the presence of the enhanced MC6847T1 VDG (Video Display Generator) chip therein. Every original CoCo and the majority of CoCo 2s (those displaying the TRS-80 label) use the earlier MC6847. As its name implies, the VDG generates the CoCo's video output. The plain 6847 version contains only uppercase characters in its internal character set, whereas the 6847T1 also contains lowercase characters. Note that software and hardware solutions have been created to overcome this limitation of the 6847, without which lowercase characters are displayed as reverse-video uppercase characters. Conversely, while the 6847T1 is capable of generating true hardware-based lowercase, that capability is seldom exploited.

NOTE: Information is still being compiled and confirmed about the various models, particularly those in the A- and B-series. Updates will likely be forthcoming......

= References =

* http://users.digitalindigo.net/techno/coco2.html
* https://web.archive.org/web/20150325023609/www.tandycoco.com/coco2.shtml

[[Category:Hardware]]

Color Computer 2

2022-07-24T12:07:38Z

MagicFab: Added the 26-3126 model

[[File:Coco2.Gif|thumb|Color computer 2]]

= Models =

The CoCo2 was first released in September of 1983.

* CB = Color Basic
* ECB = Extended Color Basic

== 26-3026, 26-3026A, 26-3026B model (16K CB ) - September 1983 ==
The first CoCo 2 model released included 16K RAM with standard Color BASIC and was listed in Radio Shack catalogs at U$239.95. The case was a bit smaller than the original CoCo, very similar to the TDP-100. The keyboard was much better than the original CoCo "chicklet" keyboard. They were lower profile than typical modern PC keyboards and the keys were recessed in the center, giving them a "melted" look - a term now used to describe this model.

The circuit boards were revised to be a bit smaller than previous models and were equipped to run a full 64K. Most of its chips are socketed. This machine is based on the #8709416 PC board, and has a large, upright RF modulator with integrated TV channel 3/4 switch.

Also characteristic of this machine is the use of a large power supply pass transistor (in a TO-3 package). The two 24-pin ROM sockets are located near the cartridge/system bus connector, and the eight RAM chips are located in a single row under the keyboard.

This same model number has reportedly been found on larger, Korean-made CoCo models in Australia.

There are two possible versions (and 'A' and 'B') for this catalog number.

== 26-3027 (16K ECB), 26-3003 (64K ECB) ==
This 16K ECB model was listed for $319.95, $399.95 for 64K. A 64K RAM upgrade (26-3017/26-3017B) was "only" $149, and the Extended BASIC ROM upgrade (26-3018) was $79.95, making the $399.95 26-3003 a relative bargain (add the ROM and RAM upgrade to a 16K basic model the total price was $468.90).

The 26-3027 model is identical to the 26-3026, with the exception that it already has the Extended BASIC ROM factory-installed.

There are two possible versions (and 'A' and 'B') for the 26-3027 catalog number.

=== RAM upgrade ===

To upgrade the 26-3026 or 26-3027 to 64 KB of RAM, it is necessary to replace the eight 8040517 chips with 4164 chips of 200 ns or better access time, and to solder a wire between the two pads labelled W1. W1 is located between U6 and U7.

Example documented upgrades :
* [https://www.st-hubert.org/phase2/truepages/elec0006.html 26-3026 model 16K to 64K upgrade]

== 26-3126 (64K, ECB) CoCo 2 kit ==

This particular model of CoCo 2 was sold in the educational market as a kit of parts to be assembled. It included a booklet with full instructions to assemble the kit into a full CoCo 2 system, including all electronics parts but also power supply, keyboard and complete case.

== 26-3127 (64K, ECB), 26-3127B ==

This is the first '64K Color Computer 2'. It also featured the 'enhanced' keyboard, otherwise, it is identical to the 26-3026/26-3027.

=== RAM replacement ===

Note that the RAM is soldered in place in those machines which were factory-equipped with 64K, making replacement thereof a bit more difficult if necessary. For this reason, the 26-3026 and 26-3027 variants are favorites among CoCo 2 enthusiasts.

== The Korean-made CoCo 2s ==

=== 26-3134 (16K CB), 26-3136 (16K ECB) ===

The 26-3134 model is the first Korean-made 16K Color BASIC CoCo 2. It uses the #20261043 circuit board, which differs considerably from that used in the earlier USA-made models. Virtually every component on the board has been relocated. The RF modulator is now a smaller unit, lying flat on the board rather than standing upright, and the channel 3/4 switch has been moved to the main board from the modulator. The positions of the various switches and connectors on the PC board (and therefore on the rear panel) differ from those of the previous machines as well. The RAM chips are located in two rows (one of five and one of three chips).

This machine has a metal 'cage' surrounding the power transformer, which was not present in previous models. The power supply utilizes a cooler-running pass transistor (in a TO-220 package). The RF modulator, power transformer, pass transistor, and switch/jack location characteristics of this machine persist on all subsequent models. Most chips are soldered in place on this and all subsequent boards as well.

The 26-3136 model is identical to the 26-3134, but with the Extended BASIC ROM factory-installed.

=== 26-3134A (16K CB 1.3), 26-3136A (16K ECB) ===

The 26-3134A model is the next Korean 16K Color BASIC CoCo 2. It utilizes a #20261044 circuit board, which differs considerably from the previous versions.

The 26-3136A model is the 16K Extended BASIC version of the 26-3134A.

==== ROM upgrade ====
The 26-3134A model board's ROM design has yet to be confirmed.

The 26-3136A model uses a single 28-pin, 16-kilobyte ROM containing both Color BASIC and Extended BASIC.

=== 26-3134B (16K CB 1.3), 26-3136B (16K ECB) ===

The 26-3134B model is the last Korean 16K Color BASIC model. It uses the #20261058 circuit board, which is similar to the #20261044 board. It uses two 4416 RAM chips and a 24-pin Color BASIC 1.3 ROM in a 28-pin socket as well. However, in addition to the 4416/4464 sockets and special daughter board connectors, there are pads on the board allowing direct factory installation of eight 4164 chips. This is also the board which contains the newer 6847T1 VDG chip (which is not pin-compatible with the earlier 6847).

The 26-3136B model is the Extended BASIC version of the 26-3134B.

=== 26-3127B (64K ECB ) (some with lowercase support) ===

The last Korean-made model number associated with the 64K ECB CoCo 2, this is an odd one indeed.

Some of the 26-3127B CoCo 2 models are known to have been produced with different Video Display Generator (VDG) chips, either the [[Motorola 6847|Motorola MC6847 or the enhanced MC6847T1]] (marked XC80652P, [https://colorcomputerarchive.com/repo/Documents/Datasheets/MC6847T1%20MOS%20Video%20Display%20Generator%20%28Motorola%29.pdf#page=23 spec sheet]). In comparison, the CoCo3 does not have a real 6847, it has a custom chip (the ACVC) with an internal character generator ROM.

Among these models we find :
* A USA-made TRS-80 with a #20261044 board and a 6847
* A USA-made Tandy with a #20261058 board and a 6847T1
* A Korean-made Tandy with a #20261058 board and a 6847T1.

They were three distinctly different machines, each bearing this same exact 26-3127B model number. This VDG chip is also known as the 6847 or 6847T1, the T1 version would include a lowercase character set.

Contrary to some rumors, the presence of the 'B' in the model number does NOT necessarily indicate the presence of a 6847T1. As noted previously, the Tandy label appears to be the best external indication thereof.

One absolutely accurate method of determining if one is present is to type a '0' (zero) on an operating machine. If the resulting character on the screen is displayed with a slash through it, the machine in question has a 6847T1.

* [https://bigcode.wordpress.com/2020/05/09/tandy-coco-2b-true-lowercase-fonts/ Tandy Coco 2B true lowercase fonts]
* [https://stardot.org.uk/forums/viewtopic.php?f=44&t=22505 6847t1 Font Mystery]
* [https://damieng.com/blog/2016/08/09/typography-in-bits-for-a-few-pixels-more/ Typography in bits: For a few pixels more]
* [http://www.cocovga.com/documentation/system-identification/korean-made-coco-2-identification/ Korean-Made CoCo 2 Identification (either 6847 or 6847T1)]

=== RAM upgrades for Korean models ===

These 64K RAM upgrade notes apply to 26-3134A, 26-3136A, 26-3134B, or 26-3136B models ONLY.

The board's RAM is in the form of two socketed 4416 chips. The preferred 64K upgrade these models involves replacing them with two 4464 chips of 200 ns or better access time and to solder a jumper across the two pads labeled RAM SIZE 64K. The RAM SIZE 64K jumper is located next to IC4.

For the 26-3134A model the option also exists (by means of several special connectors on the board) of a factory upgrade consisting of eight 4164 chips on a daughter board. Legend has it that the option of using either 4164s or 4464s was incorporated for economic reasons (the pricing and availability of RAM were quite unstable when these machines were manufactured). Additionally, this board introduces the use of a single 28-pin ROM socket. A 24-pin ROM containing only Color BASIC 1.3 shipped in that socket in this model. With appropriate jumpering, this socket is able to accept a 27128 EPROM.

= Pricing =
Prices dropped quickly. In mid 1984 RS cut the price for the 16K standard model to $159.95 and the 16K Extended BASIC model to $199.95. Production then shifted from Tandy's US plant to a Korean subcontractor. Those models appeared in mid 1984 at the same prices as the previous models, with new model numbers and revised circuit boards. For Christmas 1984 prices were reduced -- $99.95 for a standard Color BASIC 16K model (31-3134), $139.95 for 16K and Extended Color BASIC (31-3136), and $199.95 with 64K and Extended Color BASIC (31-3127). Prices continued to drop as the home computer market got very competitive and IBM PC clones started coming down in price.

To put these prices in perspective, the new for 1985 Tandy 1000, which was an IBM PC clone (actually an enhanced IBM PC Jr. clone that could be upgraded to standard IBM PC specs) was listed at $1199 with 128K RAM and a single 360K floppy drive. An RF modulator could be purchased ($24.95) to use a standard TV as a display (limited to 40 columns) or a digital $159.95 monochrome/$549.95 color monitor could be used. The CoCo 2 was a relative bargain, although there were a few IBM clones that could be purchased a bit cheaper than the Tandy 1000. In 1987 the Tandy 1000SX was priced at $849 with 384K of RAM and one 360K floppy drive.

The final CoCo2 was listed in the 1987 Tandy catalog for only $99.95 with 64K and Extended Color BASIC.

= Differences =
[http://users.digitalindigo.net/~techno/coco2.html Extracted from]
The CoCo 2, introduced in 1983, is basically a refinement of Radio Shack's original TRS-80 Color Computer. It utilizes a more efficient power supply, higher integration (lower parts count), and a smaller case. The primary goal of these modifications was most likely to lower its manufacturing cost. The only significant functional difference between the two is the absence in the CoCo 2 of a regulated +12VDC power supply. One of the few devices which actually requires this power source is the first-generation floppy disk controller sold for the original CoCo. All subsequent controllers operate exclusively from the +5VDC line.
The CoCo 2 was initially offered with 16 kilobytes of RAM, with the option of upgrading it to 64 kilobytes. Doing so requires considerably less effort than in previous models (typically replacing the RAM chips and soldering one jumper).

While the original CoCo used a keyboard with small, flat, square keys (usually referred to as the 'chicklet' keyboard) and a gray-colored case, the CoCo 2 brought with it a more 'modern' off-white case and a keyboard with 'sculptured' keys. Some describe these early CoCo 2 keyboards as having keys which appear to be 'melted'. The travel distance of said keys is fairly low, as with the chicklet keyboard.

= Upgrading your CoCo 2 =

'''CAUTION! DO NOT ATTEMPT TO UPGRADE ANY CoCo RAM OR ROM WITHOUT FIRST SECURING SPECIFIC UPGRADE INSTRUCTIONS FOR YOUR MACHINE!'''

Please note that improper upgrade attempts have been known to destroy the majority of the chips in a CoCo!

== RAM ==

Note also that the RAM chips used in the 16K CoCo 2 are not the 4116s which one might have expected. The 4116 requires additional power supply voltages not supplied by the CoCo 2. Therefore, a special 16K by 1 bit RAM chip requiring only +5VDC is used. This chip has the Tandy house number 8040517.

The RAM used in most 64K CoCo 2s consists of standard 4164 chips.

CoCo 2 RAM upgrade information may be found below in the sections specific to each 16K CoCo 2 version.

== ROMs ==

Like the original Color Computer, the CoCo 2 has provisions for two ROMs. Each consists (in most cases) of 8 kilobytes of data in a 24-pin ROM chip :

* '''Color BASIC'''
The Color BASIC ROM is present in every CoCo. It contains the minimal BASIC interpreter and necessary routines to drive the machine's keyboard, video circuitry, and I/O ports. Most CoCo 2s use version 1.2 of the Color BASIC ROM (the two ROM versions are independent). A Color BASIC machine displays its Color BASIC version at powerup.

* '''Extended Color BASIC'''
The optional Extended BASIC ROM adds extra graphics commands and other assorted functionality enhancements. Extended Color BASIC (the composite of both ROMs) is also required in order to utilize a floppy disk controller on a CoCo. Extended CoCo 2s use version 1.1 of Extended BASIC (the two ROM versions are independent). An Extended Color BASIC machine displays its Extended BASIC version.

Those machines which shipped without the Extended BASIC ROM could be upgraded (in most cases) simply by plugging the expansion ROM into the appropriate empty socket. The remaining machines shipped with the ROM already in place.

The BASIC command 'EXEC 41175' will display the Color BASIC ROM version in an Extended Color BASIC machine.

== Keyboards ==

Before long, Radio Shack began to offer an additional model of the CoCo 2: one with Extended Color BASIC and 64 kilobytes of RAM already installed. This machine also shipped with a newly-designed keyboard, with greater key travel than either of the previous styles. Every new CoCo 2 began to ship with this new, 'enhanced' keyboard. Note that late-model CoCo 1 chicklet keyboards, all CoCo 2 keyboards, and even CoCo 3 keyboards use the same type of mylar ribbon cables and are interchangeable.

The CoCo 3 keyboard (and some third-party designs) utilize previously-unused positions in the CoCo's keyboard matrix, adding several new keys. Appropriate software can make use of the extra keys on any CoCo model. Note that the style (appearance, key travel, etc.) of the CoCo 3 keyboard is identical to that of the later CoCo 2 keyboard, with the exception of its extra keys.

== Labels as an indication of model differences ==

Radio Shack switched, during the production of the CoCo 2, from the use of the 'TRS-80' label to the 'Tandy' label on its computer products. For this reason, the CoCo 2 can be found with either label. The vast majority of samples seen and possessed by the author display the TRS-80 label. The Tandy label appears to coincide accurately with yet another variation among CoCo 2 models: the presence of the enhanced MC6847T1 VDG (Video Display Generator) chip therein. Every original CoCo and the majority of CoCo 2s (those displaying the TRS-80 label) use the earlier MC6847. As its name implies, the VDG generates the CoCo's video output. The plain 6847 version contains only uppercase characters in its internal character set, whereas the 6847T1 also contains lowercase characters. Note that software and hardware solutions have been created to overcome this limitation of the 6847, without which lowercase characters are displayed as reverse-video uppercase characters. Conversely, while the 6847T1 is capable of generating true hardware-based lowercase, that capability is seldom exploited.

NOTE: Information is still being compiled and confirmed about the various models, particularly those in the A- and B-series. Updates will likely be forthcoming......

= References =

* http://users.digitalindigo.net/techno/coco2.html
* https://web.archive.org/web/20150325023609/www.tandycoco.com/coco2.shtml

[[Category:Hardware]]

Video Display Generator

2022-07-24T11:31:20Z

MagicFab: /* Lower case and the 6847T1 */ fixed the image

{{Merge|VDG}}

{{Merge|Motorola 6847}}

===VDG===
[[Image:Coco2boot.png|thumb|320px|Power-on screen of a CoCo 2]]
The MC6847 is display generator capable of displaying text and graphics contained within a roughly square display matrix 256 pixels wide by 192 lines high. It can display 9 colors: black, green, yellow, blue, red, buff (almost-but-not-quite white), cyan, magenta, and orange.

====Alphanumeric/Semigraphics display====
[[Image:Cocobvdg.png|thumb|320px|Sample character set display of 6847 VDG]]
The CoCo is physically wired such that its default alphanumeric display is actually "Semigraphics 4" mode.

In alphanumeric mode, each character is a 5 dot wide by 7 dot high character in a box 8 dots wide and 12 lines high. This display mode consumes 512 bytes of memory and is a 32 character wide screen with 16 lines. The internal ROM character generator only holds 64 characters, so no lower case characters are provided. Lower case characters were rendered as upper case characters with inverted color. Although simulated screen shots would show this as green on black, on most CoCo generations it was actually green on very dark green.

Semigraphics is a hybrid display mode where alphanumerics and chunky block graphics can be mixed together on the same screen. If the 8th bit of the character is set, it is a semigraphics character. If cleared, it is an alphanumeric. When the 8th bit is set, the next three bits determine the color and last 4 bits determine which "quadrant" of the character box is either the selected color or black. This is the only mode where it is possible (without sneaky tricks) to display all 9 colors on the screen simultaneously. If used to only display semigraphics, the screen becomes a 64×32 9 color graphics mode. The CoCo features several BASIC commands to manage this screen as a low-res graphics display.

The alphanumeric display has two colorsets. The one used by default on the CoCo has black characters on a green background. The alternate has black characters on an orange background. The colorset selection does not affect semigraphics characters. The border in this mode is always black.

The 6847 is capable of a Semigraphics 6 display mode, where two bits select a color and 6 bits determine which 1/6 of the character box is lit. In this mode only 4 colors are possible but the Colorset bit of the VDG can select two different groups of the 4 colors. [http://www.cs.unc.edu/~yakowenk/coco/text/semigraphics.html Due to a peculiarity of its hardware, only two colors are available in graphics blocks when using Semigraphics 6 on the CoCo].

====Additional Semigraphics modes====
By setting the SAM such that it believes it is displaying a full graphics mode, but leaving the VDG in Alphanumeric/Semigraphics 4 mode, it is possible to subdivide the character box into smaller pieces. This creates the "virtual" modes Semigraphics 8, 12, and 24.<ref>[http://www.lomont.org/Software/Misc/CoCo/Lomont_CoCoHardware.pdf Chris Lomont's Color Computer 1/2/3 Hardware Programming]</ref> In these modes it was possible to mix bits and pieces of different text characters as well as Semigraphics 4 characters. These modes were an interesting curiosity but not widely used, as the Semigraphics 24-screen consumed 6144 bytes of memory. These modes were not implemented on the CoCo 3.

A programmer's reference manual for the CoCo states that due to a fire at Tandy's research lab, the papers relating to the semigraphics modes were shuffled, and so some of the semigraphics modes were never documented. CoCo enthusiasts created experimental programs to try to reverse engineer the modes, and were able to reconstruct the missing documentation.<ref>[http://home.att.net/~robert.gault/Coco/History/Semi24.htm Semigraphics24 for the Coco1&2. Machine language program to create 8 true colors plus text on screen at one time.]</ref>{{Citation needed|date=January 2008}}

====Graphics display====
There were several full graphics display modes, which were divided into two categories: "resolution" graphics and "color" graphics. In resolution modes, each pixel is addressable as either on or off. There are two colorsets available, the first was black dots on a green background and green border, the second, more commonly used one has white dots on a black background with a white border. In color modes, each pixel was two bits, selecting one of four colors. Again the colorset input to the VDG determined which colors were used. The first colorset has a green border, and the colors green, yellow, red, and blue were available. The second colorset has a white border and the colors white, cyan, magenta and orange were available. Resolution graphics have 8 pixels per byte and are available in 128×64, 128×96, 128×192, and 256×192 densities. Color graphics have 4 pixels per byte and are available in 64×64, 128×64, 128×96, and 128×192 densities. The maximum size of a graphics screen is 6144 bytes.

====Artifact colors====
The 256×192 two color graphics mode uses four colors due to a quirk in the NTSC television system (see [[composite artifact colors]]).
It is not possible to reliably display 256 dots across the screen due to the limitations of the NTSC signal and the phase relationship between the VDG clock and colorburst frequency.

In the first colorset, where green and black dots are available, alternating columns of green and black are not distinct and appear as a muddy green color. However, when one switches to the white and black colorset, instead of a muddy gray as expected, the result is either orange or blue.
Reversing the order of the alternating dots will give the opposite color.
In effect this mode becomes a 128×192 4 color graphics mode where black, orange, blue, and white are available (the [[Apple II]] created color graphics by exploiting a similar effect).

Most CoCo games used this mode as the colors available are more useful than the ones provided in the hardware 4 color modes. Unfortunately the VDG internally can power up on either the rising or falling edge of the clock, so the bit patterns that represent orange and blue are not predictable. Most CoCo games would start up with a title screen and invited the user to press the reset button until the colors were correct. The CoCo 3 fixed the clock-edge problem so it was always the same; a user would hold the F1 key during reset to choose the other color set.

On a CoCo 3 with an analog RGB monitor, the black and white dot patterns do not artifact; to see them one would have to use a TV or composite monitor, or patch the games to use the hardware 128×192 four color mode in which the GIME chip allows the color choices to be mapped. Users in [[PAL]] countries saw green and purple stripes instead of solid red and blue colors.

Readers of ''[[The Rainbow (magazine)|The Rainbow]]'' or ''Hot CoCo'' magazine learned that they could use some POKE commands to switch the 6847 VDG into one of the artifact modes, while Extended Color Basic continued to operate as though it were still displaying one of the 128×192 four-color modes. Thus, the entire set of Extended Color Basic graphics commands could be used with the artifact colors. Some users went on to develop a set of 16 artifact colors{{how|date=October 2012}} using a 4×2 pixel matrix, giving this set of colors: black, dark cyan, brick red, light violet, dark blue, azure (the blue above), olive green, brown, purple, light blue, orange, yellow, light gray, blue-white, pink-white, and white. Use of POKE commands also made these colors available to the graphics commands, although the colors had to be drawn one horizontal line at a time. Some interesting artworks were produced from these effects, especially since the CoCo Max art package provided them in its palette of colors.

====Lower case and the 6847T1====
[[Image:Coco2bvdg_lc.png|thumb|320px|Sample character set display of 6847T1 VDG in true lowercase mode]]
The 6847 is capable of using an external character generator. Several third party add-on adapter boards would allow the CoCo to display real lowercase characters.

Very late in the CoCo 2 production run, an enhanced VDG was available. Called the 6847T1, it included a lower case character generator and the ability to display a green/orange or black border on the text screen. Its other changes were mainly to reduce parts count by incorporating an internal data latch. The lower case capability of this VDG is not enabled by default on this system and is not even mentioned in the manual. Only through some tinkering and research was this feature discovered by intrepid CoCo users.

The 6847T1 may also carry the part number XC80652P; these may have been pre-release parts.

==See Also==
*[[VDG]]
*[[Motorola 6847]]

[[Category:Hardware]]

File:Coco2bvdg lc.png

2022-07-24T11:30:42Z

MagicFab: Published under Public Domain - source : https://commons.wikimedia.org/wiki/File:Coco2bvdg_lc.png

== Summary ==
Published under Public Domain - source : https://commons.wikimedia.org/wiki/File:Coco2bvdg_lc.png

TestingTheColorComputer

2022-07-21T11:45:45Z

MagicFab: /* Quick power, keyboard and CPU test */

= Testing the Color Computer =

There are a few ways to test operation of a Color Computer. This may be useful when buying or selling a CoCo, when taking out old equipment from storage or simply to test your daily driver.

These tips for testing apply to all Color Computer models unless otherwise noted.

== Preparing to test ==

* [https://eshop.macsales.com/blog/2225-discharging-static-electricity-for-safe-computer-upgrading/ Discharge yourself of static electricity].
* Make sure no objects have fallen into the CoCo through the ventilation slots or Program Pak slot, possibly causing a short circuit
* Consider using an [https://en.wikipedia.org/wiki/Uninterruptible_power_supply Uninterruptible power supply (UPS)] to ensure having a continuous, noise-free power source and avoid damage to your equipment.

== Quick power, keyboard and CPU test ==

No special tools, cable or tape player are needed for this quick test.

The CoCo controls a tape player connected to it through the CASSETTE port via an internal relay that makes a distinctive "click" sound.

To test your Color Computer power, keyboard and CPU without any extra tools :

* Connect your computer to a power source, make sure it's the proper voltage
* Power on the CoCo, a "click" sound should be heard from the relay controlling power to the cassette port. The same click can be heard when the CoCo is powered on and you press the RESET button.
** If you heard the relay sound when powering on, compare it to pressing the RESET button several times. The RESET button sound should be different when the CoCo is ON or OFF.
** After hearing the relay sound and turning on the CoCo, type MOTOR ON (follower by the ENTER key) blindly. You should hear again the relay sound

If you've heard the relay sound after typing MOTOR ON, there is a good chance the power, CPU and keyboard are functional on your CoCo.

== Display test ==

All CoCos come with a standard RF output port (RCA female connector). This can be confusing as many older computers and game consoles with such a port can be connected to a standard composite monitor.

The CoCo can't use such a monitor directly, as it was originally designed to be connected to TVs commonly available at home.

In order to test video operation you need to connect the CoCo to a modern TV, using a coaxial connection. The easiest and cheapest way to do this with common components is to get a cable and adapter as follows :

* [https://www.cablewholesale.com/products/coaxial-cable/rca-coax-connectors/product-30x3-03120.php F-Pin Female to RCA Male Adapter]
* Coaxial cable

# Connect the adapter to your CoCo and to the cable. Connect the other end of the cable to the TV.
# Turn on the TV and change to channel 3 or 4
# Turn on the CoCo, play with the switch behind your CoCo. Only one setting may work best on your TV depending on different factors.

== Troubleshooting ==

* One common cause for a CoCo to be "dead" is the chips becoming loose over time and moving. Make sure the CoCo is off and disconnected, then open its case and reseat any chips.
* Some capacitors may have [https://www.youtube.com/watch?v=zk_UTsq0RVI blown or leaked over time]. These components can be replaced by yourself if you have the soldering experience, some people in the community also offer this service.

TestingTheColorComputer

2022-07-21T11:44:19Z

MagicFab:

= Testing the Color Computer =

There are a few ways to test operation of a Color Computer. This may be useful when buying or selling a CoCo, when taking out old equipment from storage or simply to test your daily driver.

These tips for testing apply to all Color Computer models unless otherwise noted.

== Preparing to test ==

* [https://eshop.macsales.com/blog/2225-discharging-static-electricity-for-safe-computer-upgrading/ Discharge yourself of static electricity].
* Make sure no objects have fallen into the CoCo through the ventilation slots or Program Pak slot, possibly causing a short circuit
* Consider using an [https://en.wikipedia.org/wiki/Uninterruptible_power_supply Uninterruptible power supply (UPS)] to ensure having a continuous, noise-free power source and avoid damage to your equipment.

== Quick power, keyboard and CPU test ==

The CoCo controls a tape player connoected to it through the CASSETTE port, via an internal relay that makes a distinctive "click" sound. There is no need for any cable or tape player for this test.

To test your Color Computer power, keyboard and CPU without any extra tools :

* Connect your computer to a power source, make sure it's the proper voltage
* Power on the CoCo, a "click" sound should be heard from the relay controlling power to the cassette port. The same click can be heard when the CoCo is powered on and you press the RESET button.
** If you heard the relay sound when powering on, compare it to pressing the RESET button several times. The RESET button sound should be different when the CoCo is ON or OFF.
** After hearing the relay sound and turning on the CoCo, type MOTOR ON (follower by the ENTER key) blindly. You should hear again the relay sound

If you've heard the relay sound after typing MOTOR ON, there is a good chance the power, CPU and keyboard are functional on your CoCo.

== Display test ==

All CoCos come with a standard RF output port (RCA female connector). This can be confusing as many older computers and game consoles with such a port can be connected to a standard composite monitor.

The CoCo can't use such a monitor directly, as it was originally designed to be connected to TVs commonly available at home.

In order to test video operation you need to connect the CoCo to a modern TV, using a coaxial connection. The easiest and cheapest way to do this with common components is to get a cable and adapter as follows :

* [https://www.cablewholesale.com/products/coaxial-cable/rca-coax-connectors/product-30x3-03120.php F-Pin Female to RCA Male Adapter]
* Coaxial cable

# Connect the adapter to your CoCo and to the cable. Connect the other end of the cable to the TV.
# Turn on the TV and change to channel 3 or 4
# Turn on the CoCo, play with the switch behind your CoCo. Only one setting may work best on your TV depending on different factors.

== Troubleshooting ==

* One common cause for a CoCo to be "dead" is the chips becoming loose over time and moving. Make sure the CoCo is off and disconnected, then open its case and reseat any chips.
* Some capacitors may have [https://www.youtube.com/watch?v=zk_UTsq0RVI blown or leaked over time]. These components can be replaced by yourself if you have the soldering experience, some people in the community also offer this service.

TestingTheColorComputer

2022-07-21T11:43:32Z

MagicFab: First version, testing your CoCo

There are a few ways to test operation of a Color Computer. This may be useful when buying or selling a CoCo, when taking out old equipment from storage or simply to test your daily driver.

== Preparing to test ==

* [https://eshop.macsales.com/blog/2225-discharging-static-electricity-for-safe-computer-upgrading/ Discharge yourself of static electricity].
* Make sure no objects have fallen into the CoCo through the ventilation slots or Program Pak slot, possibly causing a short circuit
* Consider using an [https://en.wikipedia.org/wiki/Uninterruptible_power_supply Uninterruptible power supply (UPS)] to ensure having a continuous, noise-free power source and avoid damage to your equipment.

== Quick power, keyboard and CPU test ==

The CoCo controls a tape player connoected to it through the CASSETTE port, via an internal relay that makes a distinctive "click" sound. There is no need for any cable or tape player for this test.

To test your Color Computer power, keyboard and CPU without any extra tools :

* Connect your computer to a power source, make sure it's the proper voltage
* Power on the CoCo, a "click" sound should be heard from the relay controlling power to the cassette port. The same click can be heard when the CoCo is powered on and you press the RESET button.
** If you heard the relay sound when powering on, compare it to pressing the RESET button several times. The RESET button sound should be different when the CoCo is ON or OFF.
** After hearing the relay sound and turning on the CoCo, type MOTOR ON (follower by the ENTER key) blindly. You should hear again the relay sound

If you've heard the relay sound after typing MOTOR ON, there is a good chance the power, CPU and keyboard are functional on your CoCo.

== Display test ==

All CoCos come with a standard RF output port (RCA female connector). This can be confusing as many older computers and game consoles with such a port can be connected to a standard composite monitor.

The CoCo can't use such a monitor directly, as it was originally designed to be connected to TVs commonly available at home.

In order to test video operation you need to connect the CoCo to a modern TV, using a coaxial connection. The easiest and cheapest way to do this with common components is to get a cable and adapter as follows :

* [https://www.cablewholesale.com/products/coaxial-cable/rca-coax-connectors/product-30x3-03120.php F-Pin Female to RCA Male Adapter]
* Coaxial cable

# Connect the adapter to your CoCo and to the cable. Connect the other end of the cable to the TV.
# Turn on the TV and change to channel 3 or 4
# Turn on the CoCo, play with the switch behind your CoCo. Only one setting may work best on your TV depending on different factors.

== Troubleshooting ==

* One common cause for a CoCo to be "dead" is the chips becoming loose over time and moving. Make sure the CoCo is off and disconnected, then open its case and reseat any chips.
* Some capacitors may have [https://www.youtube.com/watch?v=zk_UTsq0RVI blown or leaked over time]. These components can be replaced by yourself if you have the soldering experience, some people in the community also offer this service.

Color Computer 1

2022-07-18T19:33:35Z

MagicFab: Added intro, also white model case

== Color Computer 1 (1980-1983) ==

[[File:Coco1.jpg|thumb|Color Computer 1]]

'''TRS-80 Color Computer from 1980'''

The Radio Shack TRS-80 Color Computer was originally made available in 1980. A number of peripherals were available: tape cassette storage, serial printers, a 5.25 inch floppy disk drive, a pen and graphics tablet called the "X-Pad", speech and sound generators, and joysticks.

== 4K (26-3001), 16K (26-3002, 26-3004, 26-3004A), or 32K (26-3003) ==

Versions with at least 16K of memory installed shipped with standard Microsoft Color Basic or (optionally) Extended Color Basic. It used a regular TV for display, and TV-out was the only available connection to a display device.

The early versions of the CoCo 1 had a black keyboard surround, the TRS-80 nameplate above the keyboard to the left side, and a RAM badge ("button") affixed on the top and right side of the case. Later versions removed the black keyboard surround and RAM button, and moved the TRS-80 nameplate to the mid-line of the case.

Model 26-3004 has been found in both PAL and NTSC configurations, 26-3004A being distributed in Canada.

Initial versions of the CoCo were upgraded to 32K by means of piggybacking two banks of 16K memory chips and adding a few jumper wires. A later motherboard revision removed the 4K RAM option and were upgraded to 32K with "half-bad" 64K memory chips as a cost-cutting measure. These boards have jumpers marked HIGH/LOW to determine which half of the memory chip was good. This was transparent to the BASIC programmer since in either configuration 32K of memory was available.

As memory production yields improved and costs went down, many (perhaps most) 32K CoCo 1s were shipped with perfectly good 64K memory chips; many utilities and programs began to take advantage of the "hidden" 32K.

Eventually the 32K memory option was dropped entirely and only 16K or 64K versions were offered. All versions that shipped with standard Color BASIC could be upgraded to Extended BASIC by simply plugging a ROM into an empty socket provided on the motherboard.

== 64K (26-3003B) White case CoCo 1 and TDP 100 ==

Toward the end of the CoCo 1 production run, some models shipped in a white case with a modified keyboard, often referred to as the "melted" keyboard, which had bigger keycaps but a similar rubbery feel. At about the same time, another white-cased "CoCo", the TDP-100, was marketed through Tandy Data Products (TDP) and sold through a different distribution channel. Except for the nameplate and case, the TDP-100 was completely identical to the CoCo 1. The TDP-100 had ventilation slots that ran the entire length of the case, rather than only on the sides. This ventilation scheme was carried over to the CoCo 2.

[[File:TDP-100.jpg|thumb|Tandy Data Products TDP-100 (64K badge was added by user) ]]

== References ==

* [http://en.wikipedia.org/wiki/TRS-80_Color_Computer#Color_Computer_1_.281980.E2.80.931983.29/ TRS-80 Color Computer] @ Wikipedia
* [http://www.tandycoco.com/coco1.shtml Color Computer 1] @ TandyCoCo.com

[[Category:Hardware]]

Color Computer 1

2022-07-18T15:40:35Z

MagicFab: /* 4K (26-3001), 16K (26-3002, 26-3004, 26-3004A), or 32K (26-3003) */

== Color Computer 1 (1980-1983) ==

[[File:Coco1.jpg|thumb|Color Computer 1]]

'''TRS-80 Color Computer from 1981'''

The original version of the Color Computer shipped in a large silver-gray case with a calculator-like "chiclet keyboard", and was available with the following memory sizes:

The Radio Shack TRS-80 Color Computer was originally made available in 1980. A number of peripherals were available: tape cassette storage, serial printers, a 5.25 inch floppy disk drive, a pen and graphics tablet called the "X-Pad", speech and sound generators, and joysticks.

== 4K (26-3001), 16K (26-3002, 26-3004, 26-3004A), or 32K (26-3003) ==

Versions with at least 16K of memory installed shipped with standard Microsoft Color Basic or (optionally) Extended Color Basic. It used a regular TV for display, and TV-out was the only available connection to a display device.

The early versions of the CoCo 1 had a black keyboard surround, the TRS-80 nameplate above the keyboard to the left side, and a RAM badge ("button") affixed on the top and right side of the case. Later versions removed the black keyboard surround and RAM button, and moved the TRS-80 nameplate to the mid-line of the case.

Model 26-3004 has been found in both PAL and NTSC configurations, 26-3004A being distributed in Canada.

Initial versions of the CoCo were upgraded to 32K by means of piggybacking two banks of 16K memory chips and adding a few jumper wires. A later motherboard revision removed the 4K RAM option and were upgraded to 32K with "half-bad" 64K memory chips as a cost-cutting measure. These boards have jumpers marked HIGH/LOW to determine which half of the memory chip was good. This was transparent to the BASIC programmer since in either configuration 32K of memory was available.

As memory production yields improved and costs went down, many (perhaps most) 32K CoCo 1s were shipped with perfectly good 64K memory chips; many utilities and programs began to take advantage of the "hidden" 32K.

Eventually the 32K memory option was dropped entirely and only 16K or 64K versions were offered. All versions that shipped with standard Color BASIC could be upgraded to Extended BASIC by simply plugging a ROM into an empty socket provided on the motherboard.

== 64K (26-3003B) White case CoCo 1 and TDP 100 ==

Toward the end of the CoCo 1 production run, some models shipped in a white case with a modified keyboard, often referred to as the "melted" keyboard, which had bigger keycaps but a similar rubbery feel. At about the same time, another white-cased "CoCo", the TDP-100, was marketed through Tandy Data Products (TDP) and sold through a different distribution channel. Except for the nameplate and case, the TDP-100 was completely identical to the CoCo 1. The TDP-100 had ventilation slots that ran the entire length of the case, rather than only on the sides. This ventilation scheme was carried over to the CoCo 2.

[[File:TDP-100.jpg|thumb|Tandy Data Products TDP-100 (64K badge was added by user) ]]

== References ==

* [http://en.wikipedia.org/wiki/TRS-80_Color_Computer#Color_Computer_1_.281980.E2.80.931983.29/ TRS-80 Color Computer] @ Wikipedia
* [http://www.tandycoco.com/coco1.shtml Color Computer 1] @ TandyCoCo.com

[[Category:Hardware]]

Internet Resources

2022-07-13T22:17:26Z

MagicFab: /* Web Forums/Message Boards */ Added Canada CoCo FB group

{{NavInternetResources}}

== Web sites ==

* See [[CoCo_Links]]

== Buy & sell ==
* A number of [https://www.cocopedia.com/wiki/index.php/Companies companies and individuals] still develop and sell new software and products for the CoCo
* [https://www.facebook.com/groups/199823804132260 CoCo Marketplace] on Facebook
* [https://discord.com/channels/301741082600013824/481172251014725634 #buy-sell-trade channel] on Discord
* Other websites - search for TRS80, Tandy and Radio Shack on these for better results
** [https://ebay.com eBay]
** [https://www.facebook.com/marketplace/ Facebook marketplace]
** Local online classified ads (eg. [https://kijiji.ca Kijiji] in Canada

== Web Forums/Message Boards ==
* [https://www.facebook.com/groups/2359462640 TRS-80 Color Computer (CoCo)] group on Facebook - English, US-centric
* [https://www.facebook.com/groups/cococanada Ordinateur Couleur TRS-80 Colour Computer (CoCo) Canada] group on Facebook - English / French, for Canada
* [https://www.facebook.com/groups/ClubeColor/ Clube Color] group on Facebook - Brazilian portuguese
* [https://www.facebook.com/groups/1929079184021683/ Tandy Color Computer OS-9 / NITROS-9] group on Facebook
* Roger Taylor message board (still active?)

== Chat ==
* [https://discordapp.com/invite/4J5nHXm Tandy Color Computer (CoCo) Discord Chat] - age verification required
* [https://matrix.to/#/#retrobytes:matrix.org RetroBytes CoCo community on Matrix] - Spanish, French and English channels
* #coco_chat IRC channel on [https://web.libera.chat/ Libera.chat]

== E-Mail Mailing Lists==
* [http://five.pairlist.net/mailman/listinfo/coco/ The MaltedMedia mailing list or CoCoList] - You can subscribe by visiting the web page and filling the subscription form.
* The <code>gmane.comp.hardware.tandy.coco</code> newsgroup on the <code>news.gmane.io</code> NNTP server - a mail-to-news gateway for the MaltedMedia mailing list, accessible through NNTP client software such as [https://www.thunderbird.net Thunderbird]. You can also use this link on some news clients: <code>news://news.gmane.org/gmane.comp.hardware.tandy.coco</code>. ''Note :''
** Postings to the gmane newsgroup are automatically spam-checked.
** Email addresses on the group are also encrypted, so private email may only be sent by subscribers and email addresses will not be harvested.

== FTP File Archives ==
*[ftp://os9archive.rtsi.com/ The OS-9 and CoCo file archive at RTSI.com]
*[ftp://maltedmedia.com/coco/ FTP site associated with the Maltedmedia CoCo mail list, run by Dennis Kitsz]

== Delphi Online Service ==
Lists of files from the OS-9 6809 and 68K file archives on the Delphi information service. These archives are no longer extant. Perhaps this wiki can serve as a way to organize the preservation of Color Computer history. Files on these lists that are preserved at RTSI.com can be marked, and those who have copies of files that aren't preserved can upload them so they are not lost to history. Only the OS-9 sections are cataloged here at this time. Please contribute lists of RSDOS files if you have them.

*[[New (as of 9/3/1996)]]
*[[General Info]]
*[[6809 System Modules]]
*[[6809 Applications]]
*[[6809 Telecommunications]]
*[[OSK System Modules]]
*[[OSK Applications]]
*[[OSK Telecommunications]]
*[[Games and Graphics]]
*[[Music and Sound]]
*[[Programming]]
*[[Standards]]
*[[Tutorial]]
*[[OS-9 User Group]]

== GEnie Online Service ==
Here is a list of CoCo and OS-9 files once hosted on the GEnie online service, long gone now of course. An interesting historical project would be to compare this list with the Delphi archives and those of Compuserve, if such a list can still be found or re-constructed.

*[[GEnie CoCo Files]] and [[GEnie CoCo Files Browse Listing]]
*[[GEnie OS-9 Files]] and [[GEnie OS-9 Files Browse Listing]]
*[[GEnie OSK Files]] and [[GEnie OSK Files Browse Listing]]
*[[GEnie Tandy Programming and High-res Graphics]]

[[Category:Internet Resources]]

Color Computer 2

2022-07-13T19:15:08Z

MagicFab: /* 26-3027 (16K ECB), 26-3003 (64K ECB) */

[[File:Coco2.Gif|thumb|Color computer 2]]

= Models =

The CoCo2 was first released in September of 1983.

* CB = Color Basic
* ECB = Extended Color Basic

== 26-3026, 26-3026A, 26-3026B model (16K CB ) - September 1983 ==
The first CoCo 2 model released included 16K RAM with standard Color BASIC and was listed in Radio Shack catalogs at U$239.95. The case was a bit smaller than the original CoCo, very similar to the TDP-100. The keyboard was much better than the original CoCo "chicklet" keyboard. They were lower profile than typical modern PC keyboards and the keys were recessed in the center, giving them a "melted" look - a term now used to describe this model.

The circuit boards were revised to be a bit smaller than previous models and were equipped to run a full 64K. Most of its chips are socketed. This machine is based on the #8709416 PC board, and has a large, upright RF modulator with integrated TV channel 3/4 switch.

Also characteristic of this machine is the use of a large power supply pass transistor (in a TO-3 package). The two 24-pin ROM sockets are located near the cartridge/system bus connector, and the eight RAM chips are located in a single row under the keyboard.

This same model number has reportedly been found on larger, Korean-made CoCo models in Australia.

There are two possible versions (and 'A' and 'B') for this catalog number.

== 26-3027 (16K ECB), 26-3003 (64K ECB) ==
This 16K ECB model was listed for $319.95, $399.95 for 64K. A 64K RAM upgrade (26-3017/26-3017B) was "only" $149, and the Extended BASIC ROM upgrade (26-3018) was $79.95, making the $399.95 26-3003 a relative bargain (add the ROM and RAM upgrade to a 16K basic model the total price was $468.90).

The 26-3027 model is identical to the 26-3026, with the exception that it already has the Extended BASIC ROM factory-installed.

There are two possible versions (and 'A' and 'B') for the 26-3027 catalog number.

=== RAM upgrade ===

To upgrade the 26-3026 or 26-3027 to 64 KB of RAM, it is necessary to replace the eight 8040517 chips with 4164 chips of 200 ns or better access time, and to solder a wire between the two pads labelled W1. W1 is located between U6 and U7.

Example documented upgrades :
* [https://www.st-hubert.org/phase2/truepages/elec0006.html 26-3026 model 16K to 64K upgrade]

== 26-3127 (64K, ECB), 26-3127B ==

This is the first '64K Color Computer 2'. It also featured the 'enhanced' keyboard, otherwise, it is identical to the 26-3026/26-3027.

=== RAM replacement ===

Note that the RAM is soldered in place in those machines which were factory-equipped with 64K, making replacement thereof a bit more difficult if necessary. For this reason, the 26-3026 and 26-3027 variants are favorites among CoCo 2 enthusiasts.

== The Korean-made CoCo 2s ==

=== 26-3134 (16K CB), 26-3136 (16K ECB) ===

The 26-3134 model is the first Korean-made 16K Color BASIC CoCo 2. It uses the #20261043 circuit board, which differs considerably from that used in the earlier USA-made models. Virtually every component on the board has been relocated. The RF modulator is now a smaller unit, lying flat on the board rather than standing upright, and the channel 3/4 switch has been moved to the main board from the modulator. The positions of the various switches and connectors on the PC board (and therefore on the rear panel) differ from those of the previous machines as well. The RAM chips are located in two rows (one of five and one of three chips).

This machine has a metal 'cage' surrounding the power transformer, which was not present in previous models. The power supply utilizes a cooler-running pass transistor (in a TO-220 package). The RF modulator, power transformer, pass transistor, and switch/jack location characteristics of this machine persist on all subsequent models. Most chips are soldered in place on this and all subsequent boards as well.

The 26-3136 model is identical to the 26-3134, but with the Extended BASIC ROM factory-installed.

=== 26-3134A (16K CB 1.3), 26-3136A (16K ECB) ===

The 26-3134A model is the next Korean 16K Color BASIC CoCo 2. It utilizes a #20261044 circuit board, which differs considerably from the previous versions.

The 26-3136A model is the 16K Extended BASIC version of the 26-3134A.

==== ROM upgrade ====
The 26-3134A model board's ROM design has yet to be confirmed.

The 26-3136A model uses a single 28-pin, 16-kilobyte ROM containing both Color BASIC and Extended BASIC.

=== 26-3134B (16K CB 1.3), 26-3136B (16K ECB) ===

The 26-3134B model is the last Korean 16K Color BASIC model. It uses the #20261058 circuit board, which is similar to the #20261044 board. It uses two 4416 RAM chips and a 24-pin Color BASIC 1.3 ROM in a 28-pin socket as well. However, in addition to the 4416/4464 sockets and special daughter board connectors, there are pads on the board allowing direct factory installation of eight 4164 chips. This is also the board which contains the newer 6847T1 VDG chip (which is not pin-compatible with the earlier 6847).

The 26-3136B model is the Extended BASIC version of the 26-3134B.

=== 26-3127B (64K ECB ) (some with lowercase support) ===

The last Korean-made model number associated with the 64K ECB CoCo 2, this is an odd one indeed.

Some of the 26-3127B CoCo 2 models are known to have been produced with different Video Display Generator (VDG) chips, either the [[Motorola 6847|Motorola MC6847 or the enhanced MC6847T1]] (marked XC80652P, [https://colorcomputerarchive.com/repo/Documents/Datasheets/MC6847T1%20MOS%20Video%20Display%20Generator%20%28Motorola%29.pdf#page=23 spec sheet]). In comparison, the CoCo3 does not have a real 6847, it has a custom chip (the ACVC) with an internal character generator ROM.

Among these models we find :
* A USA-made TRS-80 with a #20261044 board and a 6847
* A USA-made Tandy with a #20261058 board and a 6847T1
* A Korean-made Tandy with a #20261058 board and a 6847T1.

They were three distinctly different machines, each bearing this same exact 26-3127B model number. This VDG chip is also known as the 6847 or 6847T1, the T1 version would include a lowercase character set.

Contrary to some rumors, the presence of the 'B' in the model number does NOT necessarily indicate the presence of a 6847T1. As noted previously, the Tandy label appears to be the best external indication thereof.

One absolutely accurate method of determining if one is present is to type a '0' (zero) on an operating machine. If the resulting character on the screen is displayed with a slash through it, the machine in question has a 6847T1.

* [https://bigcode.wordpress.com/2020/05/09/tandy-coco-2b-true-lowercase-fonts/ Tandy Coco 2B true lowercase fonts]
* [https://stardot.org.uk/forums/viewtopic.php?f=44&t=22505 6847t1 Font Mystery]
* [https://damieng.com/blog/2016/08/09/typography-in-bits-for-a-few-pixels-more/ Typography in bits: For a few pixels more]
* [http://www.cocovga.com/documentation/system-identification/korean-made-coco-2-identification/ Korean-Made CoCo 2 Identification (either 6847 or 6847T1)]

=== RAM upgrades for Korean models ===

These 64K RAM upgrade notes apply to 26-3134A, 26-3136A, 26-3134B, or 26-3136B models ONLY.

The board's RAM is in the form of two socketed 4416 chips. The preferred 64K upgrade these models involves replacing them with two 4464 chips of 200 ns or better access time and to solder a jumper across the two pads labeled RAM SIZE 64K. The RAM SIZE 64K jumper is located next to IC4.

For the 26-3134A model the option also exists (by means of several special connectors on the board) of a factory upgrade consisting of eight 4164 chips on a daughter board. Legend has it that the option of using either 4164s or 4464s was incorporated for economic reasons (the pricing and availability of RAM were quite unstable when these machines were manufactured). Additionally, this board introduces the use of a single 28-pin ROM socket. A 24-pin ROM containing only Color BASIC 1.3 shipped in that socket in this model. With appropriate jumpering, this socket is able to accept a 27128 EPROM.

= Pricing =
Prices dropped quickly. In mid 1984 RS cut the price for the 16K standard model to $159.95 and the 16K Extended BASIC model to $199.95. Production then shifted from Tandy's US plant to a Korean subcontractor. Those models appeared in mid 1984 at the same prices as the previous models, with new model numbers and revised circuit boards. For Christmas 1984 prices were reduced -- $99.95 for a standard Color BASIC 16K model (31-3134), $139.95 for 16K and Extended Color BASIC (31-3136), and $199.95 with 64K and Extended Color BASIC (31-3127). Prices continued to drop as the home computer market got very competitive and IBM PC clones started coming down in price.

To put these prices in perspective, the new for 1985 Tandy 1000, which was an IBM PC clone (actually an enhanced IBM PC Jr. clone that could be upgraded to standard IBM PC specs) was listed at $1199 with 128K RAM and a single 360K floppy drive. An RF modulator could be purchased ($24.95) to use a standard TV as a display (limited to 40 columns) or a digital $159.95 monochrome/$549.95 color monitor could be used. The CoCo 2 was a relative bargain, although there were a few IBM clones that could be purchased a bit cheaper than the Tandy 1000. In 1987 the Tandy 1000SX was priced at $849 with 384K of RAM and one 360K floppy drive.

The final CoCo2 was listed in the 1987 Tandy catalog for only $99.95 with 64K and Extended Color BASIC.

= Differences =
[http://users.digitalindigo.net/~techno/coco2.html Extracted from]
The CoCo 2, introduced in 1983, is basically a refinement of Radio Shack's original TRS-80 Color Computer. It utilizes a more efficient power supply, higher integration (lower parts count), and a smaller case. The primary goal of these modifications was most likely to lower its manufacturing cost. The only significant functional difference between the two is the absence in the CoCo 2 of a regulated +12VDC power supply. One of the few devices which actually requires this power source is the first-generation floppy disk controller sold for the original CoCo. All subsequent controllers operate exclusively from the +5VDC line.
The CoCo 2 was initially offered with 16 kilobytes of RAM, with the option of upgrading it to 64 kilobytes. Doing so requires considerably less effort than in previous models (typically replacing the RAM chips and soldering one jumper).

While the original CoCo used a keyboard with small, flat, square keys (usually referred to as the 'chicklet' keyboard) and a gray-colored case, the CoCo 2 brought with it a more 'modern' off-white case and a keyboard with 'sculptured' keys. Some describe these early CoCo 2 keyboards as having keys which appear to be 'melted'. The travel distance of said keys is fairly low, as with the chicklet keyboard.

= Upgrading your CoCo 2 =

'''CAUTION! DO NOT ATTEMPT TO UPGRADE ANY CoCo RAM OR ROM WITHOUT FIRST SECURING SPECIFIC UPGRADE INSTRUCTIONS FOR YOUR MACHINE!'''

Please note that improper upgrade attempts have been known to destroy the majority of the chips in a CoCo!

== RAM ==

Note also that the RAM chips used in the 16K CoCo 2 are not the 4116s which one might have expected. The 4116 requires additional power supply voltages not supplied by the CoCo 2. Therefore, a special 16K by 1 bit RAM chip requiring only +5VDC is used. This chip has the Tandy house number 8040517.

The RAM used in most 64K CoCo 2s consists of standard 4164 chips.

CoCo 2 RAM upgrade information may be found below in the sections specific to each 16K CoCo 2 version.

== ROMs ==

Like the original Color Computer, the CoCo 2 has provisions for two ROMs. Each consists (in most cases) of 8 kilobytes of data in a 24-pin ROM chip :

* '''Color BASIC'''
The Color BASIC ROM is present in every CoCo. It contains the minimal BASIC interpreter and necessary routines to drive the machine's keyboard, video circuitry, and I/O ports. Most CoCo 2s use version 1.2 of the Color BASIC ROM (the two ROM versions are independent). A Color BASIC machine displays its Color BASIC version at powerup.

* '''Extended Color BASIC'''
The optional Extended BASIC ROM adds extra graphics commands and other assorted functionality enhancements. Extended Color BASIC (the composite of both ROMs) is also required in order to utilize a floppy disk controller on a CoCo. Extended CoCo 2s use version 1.1 of Extended BASIC (the two ROM versions are independent). An Extended Color BASIC machine displays its Extended BASIC version.

Those machines which shipped without the Extended BASIC ROM could be upgraded (in most cases) simply by plugging the expansion ROM into the appropriate empty socket. The remaining machines shipped with the ROM already in place.

The BASIC command 'EXEC 41175' will display the Color BASIC ROM version in an Extended Color BASIC machine.

== Keyboards ==

Before long, Radio Shack began to offer an additional model of the CoCo 2: one with Extended Color BASIC and 64 kilobytes of RAM already installed. This machine also shipped with a newly-designed keyboard, with greater key travel than either of the previous styles. Every new CoCo 2 began to ship with this new, 'enhanced' keyboard. Note that late-model CoCo 1 chicklet keyboards, all CoCo 2 keyboards, and even CoCo 3 keyboards use the same type of mylar ribbon cables and are interchangeable.

The CoCo 3 keyboard (and some third-party designs) utilize previously-unused positions in the CoCo's keyboard matrix, adding several new keys. Appropriate software can make use of the extra keys on any CoCo model. Note that the style (appearance, key travel, etc.) of the CoCo 3 keyboard is identical to that of the later CoCo 2 keyboard, with the exception of its extra keys.

== Labels as an indication of model differences ==

Radio Shack switched, during the production of the CoCo 2, from the use of the 'TRS-80' label to the 'Tandy' label on its computer products. For this reason, the CoCo 2 can be found with either label. The vast majority of samples seen and possessed by the author display the TRS-80 label. The Tandy label appears to coincide accurately with yet another variation among CoCo 2 models: the presence of the enhanced MC6847T1 VDG (Video Display Generator) chip therein. Every original CoCo and the majority of CoCo 2s (those displaying the TRS-80 label) use the earlier MC6847. As its name implies, the VDG generates the CoCo's video output. The plain 6847 version contains only uppercase characters in its internal character set, whereas the 6847T1 also contains lowercase characters. Note that software and hardware solutions have been created to overcome this limitation of the 6847, without which lowercase characters are displayed as reverse-video uppercase characters. Conversely, while the 6847T1 is capable of generating true hardware-based lowercase, that capability is seldom exploited.

NOTE: Information is still being compiled and confirmed about the various models, particularly those in the A- and B-series. Updates will likely be forthcoming......

= References =

* http://users.digitalindigo.net/techno/coco2.html
* https://web.archive.org/web/20150325023609/www.tandycoco.com/coco2.shtml

[[Category:Hardware]]

Color Computer 2

2022-07-13T14:59:43Z

MagicFab: Moved 26-31-27B to Korean-made models section

[[File:Coco2.Gif|thumb|Color computer 2]]

= Models =

The CoCo2 was first released in September of 1983.

* CB = Color Basic
* ECB = Extended Color Basic

== 26-3026, 26-3026A, 26-3026B model (16K CB ) - September 1983 ==
The first CoCo 2 model released included 16K RAM with standard Color BASIC and was listed in Radio Shack catalogs at U$239.95. The case was a bit smaller than the original CoCo, very similar to the TDP-100. The keyboard was much better than the original CoCo "chicklet" keyboard. They were lower profile than typical modern PC keyboards and the keys were recessed in the center, giving them a "melted" look - a term now used to describe this model.

The circuit boards were revised to be a bit smaller than previous models and were equipped to run a full 64K. Most of its chips are socketed. This machine is based on the #8709416 PC board, and has a large, upright RF modulator with integrated TV channel 3/4 switch.

Also characteristic of this machine is the use of a large power supply pass transistor (in a TO-3 package). The two 24-pin ROM sockets are located near the cartridge/system bus connector, and the eight RAM chips are located in a single row under the keyboard.

This same model number has reportedly been found on larger, Korean-made CoCo models in Australia.

There are two possible versions (and 'A' and 'B') for this catalog number.

== 26-3027 (16K ECB), 26-3003 (64K ECB) ==
This 16K ECB model was listed for $319.95, $399.95 for 64K. A 64K RAM upgrade (26-3017) was "only" $149, and the Extended BASIC ROM upgrade was $79.95, making the $399.95 26-3003 a relative bargain (add the ROM and RAM upgrade to a 16K basic model the total price was $468.90).

The 26-3027 model is identical to the 26-3026, with the exception that it already has the Extended BASIC ROM factory-installed.

There are two possible versions (and 'A' and 'B') for the 26-3027 catalog number.

=== RAM upgrade ===

To upgrade the 26-3026 or 26-3027 to 64 KB of RAM, it is necessary to replace the eight 8040517 chips with 4164 chips of 200 ns or better access time, and to solder a wire between the two pads labeled W1. W1 is located between U6 and U7.

Example documented upgrades :
* [https://www.st-hubert.org/phase2/truepages/elec0006.html 26-3026 model 16K to 64K upgrade]

== 26-3127 (64K, ECB), 26-3127B ==

This is the first '64K Color Computer 2'. It also featured the 'enhanced' keyboard, otherwise, it is identical to the 26-3026/26-3027.

=== RAM replacement ===

Note that the RAM is soldered in place in those machines which were factory-equipped with 64K, making replacement thereof a bit more difficult if necessary. For this reason, the 26-3026 and 26-3027 variants are favorites among CoCo 2 enthusiasts.

== The Korean-made CoCo 2s ==

=== 26-3134 (16K CB), 26-3136 (16K ECB) ===

The 26-3134 model is the first Korean-made 16K Color BASIC CoCo 2. It uses the #20261043 circuit board, which differs considerably from that used in the earlier USA-made models. Virtually every component on the board has been relocated. The RF modulator is now a smaller unit, lying flat on the board rather than standing upright, and the channel 3/4 switch has been moved to the main board from the modulator. The positions of the various switches and connectors on the PC board (and therefore on the rear panel) differ from those of the previous machines as well. The RAM chips are located in two rows (one of five and one of three chips).

This machine has a metal 'cage' surrounding the power transformer, which was not present in previous models. The power supply utilizes a cooler-running pass transistor (in a TO-220 package). The RF modulator, power transformer, pass transistor, and switch/jack location characteristics of this machine persist on all subsequent models. Most chips are soldered in place on this and all subsequent boards as well.

The 26-3136 model is identical to the 26-3134, but with the Extended BASIC ROM factory-installed.

=== 26-3134A (16K CB 1.3), 26-3136A (16K ECB) ===

The 26-3134A model is the next Korean 16K Color BASIC CoCo 2. It utilizes a #20261044 circuit board, which differs considerably from the previous versions.

The 26-3136A model is the 16K Extended BASIC version of the 26-3134A.

==== ROM upgrade ====
The 26-3134A model board's ROM design has yet to be confirmed.

The 26-3136A model uses a single 28-pin, 16-kilobyte ROM containing both Color BASIC and Extended BASIC.

=== 26-3134B (16K CB 1.3), 26-3136B (16K ECB) ===

The 26-3134B model is the last Korean 16K Color BASIC model. It uses the #20261058 circuit board, which is similar to the #20261044 board. It uses two 4416 RAM chips and a 24-pin Color BASIC 1.3 ROM in a 28-pin socket as well. However, in addition to the 4416/4464 sockets and special daughter board connectors, there are pads on the board allowing direct factory installation of eight 4164 chips. This is also the board which contains the newer 6847T1 VDG chip (which is not pin-compatible with the earlier 6847).

The 26-3136B model is the Extended BASIC version of the 26-3134B.

=== 26-3127B (64K ECB ) (some with lowercase support) ===

The last Korean-made model number associated with the 64K ECB CoCo 2, this is an odd one indeed.

Some of the 26-3127B CoCo 2 models are known to have been produced with different Video Display Generator (VDG) chips, either the [[Motorola 6847|Motorola MC6847 or the enhanced MC6847T1]] (marked XC80652P, [https://colorcomputerarchive.com/repo/Documents/Datasheets/MC6847T1%20MOS%20Video%20Display%20Generator%20%28Motorola%29.pdf#page=23 spec sheet]). In comparison, the CoCo3 does not have a real 6847, it has a custom chip (the ACVC) with an internal character generator ROM.

Among these models we find :
* A USA-made TRS-80 with a #20261044 board and a 6847
* A USA-made Tandy with a #20261058 board and a 6847T1
* A Korean-made Tandy with a #20261058 board and a 6847T1.

They were three distinctly different machines, each bearing this same exact 26-3127B model number. This VDG chip is also known as the 6847 or 6847T1, the T1 version would include a lowercase character set.

Contrary to some rumors, the presence of the 'B' in the model number does NOT necessarily indicate the presence of a 6847T1. As noted previously, the Tandy label appears to be the best external indication thereof.

One absolutely accurate method of determining if one is present is to type a '0' (zero) on an operating machine. If the resulting character on the screen is displayed with a slash through it, the machine in question has a 6847T1.

* [https://bigcode.wordpress.com/2020/05/09/tandy-coco-2b-true-lowercase-fonts/ Tandy Coco 2B true lowercase fonts]
* [https://stardot.org.uk/forums/viewtopic.php?f=44&t=22505 6847t1 Font Mystery]
* [https://damieng.com/blog/2016/08/09/typography-in-bits-for-a-few-pixels-more/ Typography in bits: For a few pixels more]
* [http://www.cocovga.com/documentation/system-identification/korean-made-coco-2-identification/ Korean-Made CoCo 2 Identification (either 6847 or 6847T1)]

=== RAM upgrades for Korean models ===

These 64K RAM upgrade notes apply to 26-3134A, 26-3136A, 26-3134B, or 26-3136B models ONLY.

The board's RAM is in the form of two socketed 4416 chips. The preferred 64K upgrade these models involves replacing them with two 4464 chips of 200 ns or better access time and to solder a jumper across the two pads labeled RAM SIZE 64K. The RAM SIZE 64K jumper is located next to IC4.

For the 26-3134A model the option also exists (by means of several special connectors on the board) of a factory upgrade consisting of eight 4164 chips on a daughter board. Legend has it that the option of using either 4164s or 4464s was incorporated for economic reasons (the pricing and availability of RAM were quite unstable when these machines were manufactured). Additionally, this board introduces the use of a single 28-pin ROM socket. A 24-pin ROM containing only Color BASIC 1.3 shipped in that socket in this model. With appropriate jumpering, this socket is able to accept a 27128 EPROM.

= Pricing =
Prices dropped quickly. In mid 1984 RS cut the price for the 16K standard model to $159.95 and the 16K Extended BASIC model to $199.95. Production then shifted from Tandy's US plant to a Korean subcontractor. Those models appeared in mid 1984 at the same prices as the previous models, with new model numbers and revised circuit boards. For Christmas 1984 prices were reduced -- $99.95 for a standard Color BASIC 16K model (31-3134), $139.95 for 16K and Extended Color BASIC (31-3136), and $199.95 with 64K and Extended Color BASIC (31-3127). Prices continued to drop as the home computer market got very competitive and IBM PC clones started coming down in price.

To put these prices in perspective, the new for 1985 Tandy 1000, which was an IBM PC clone (actually an enhanced IBM PC Jr. clone that could be upgraded to standard IBM PC specs) was listed at $1199 with 128K RAM and a single 360K floppy drive. An RF modulator could be purchased ($24.95) to use a standard TV as a display (limited to 40 columns) or a digital $159.95 monochrome/$549.95 color monitor could be used. The CoCo 2 was a relative bargain, although there were a few IBM clones that could be purchased a bit cheaper than the Tandy 1000. In 1987 the Tandy 1000SX was priced at $849 with 384K of RAM and one 360K floppy drive.

The final CoCo2 was listed in the 1987 Tandy catalog for only $99.95 with 64K and Extended Color BASIC.

= Differences =
[http://users.digitalindigo.net/~techno/coco2.html Extracted from]
The CoCo 2, introduced in 1983, is basically a refinement of Radio Shack's original TRS-80 Color Computer. It utilizes a more efficient power supply, higher integration (lower parts count), and a smaller case. The primary goal of these modifications was most likely to lower its manufacturing cost. The only significant functional difference between the two is the absence in the CoCo 2 of a regulated +12VDC power supply. One of the few devices which actually requires this power source is the first-generation floppy disk controller sold for the original CoCo. All subsequent controllers operate exclusively from the +5VDC line.
The CoCo 2 was initially offered with 16 kilobytes of RAM, with the option of upgrading it to 64 kilobytes. Doing so requires considerably less effort than in previous models (typically replacing the RAM chips and soldering one jumper).

While the original CoCo used a keyboard with small, flat, square keys (usually referred to as the 'chicklet' keyboard) and a gray-colored case, the CoCo 2 brought with it a more 'modern' off-white case and a keyboard with 'sculptured' keys. Some describe these early CoCo 2 keyboards as having keys which appear to be 'melted'. The travel distance of said keys is fairly low, as with the chicklet keyboard.

= Upgrading your CoCo 2 =

'''CAUTION! DO NOT ATTEMPT TO UPGRADE ANY CoCo RAM OR ROM WITHOUT FIRST SECURING SPECIFIC UPGRADE INSTRUCTIONS FOR YOUR MACHINE!'''

Please note that improper upgrade attempts have been known to destroy the majority of the chips in a CoCo!

== RAM ==

Note also that the RAM chips used in the 16K CoCo 2 are not the 4116s which one might have expected. The 4116 requires additional power supply voltages not supplied by the CoCo 2. Therefore, a special 16K by 1 bit RAM chip requiring only +5VDC is used. This chip has the Tandy house number 8040517.

The RAM used in most 64K CoCo 2s consists of standard 4164 chips.

CoCo 2 RAM upgrade information may be found below in the sections specific to each 16K CoCo 2 version.

== ROMs ==

Like the original Color Computer, the CoCo 2 has provisions for two ROMs. Each consists (in most cases) of 8 kilobytes of data in a 24-pin ROM chip :

* '''Color BASIC'''
The Color BASIC ROM is present in every CoCo. It contains the minimal BASIC interpreter and necessary routines to drive the machine's keyboard, video circuitry, and I/O ports. Most CoCo 2s use version 1.2 of the Color BASIC ROM (the two ROM versions are independent). A Color BASIC machine displays its Color BASIC version at powerup.

* '''Extended Color BASIC'''
The optional Extended BASIC ROM adds extra graphics commands and other assorted functionality enhancements. Extended Color BASIC (the composite of both ROMs) is also required in order to utilize a floppy disk controller on a CoCo. Extended CoCo 2s use version 1.1 of Extended BASIC (the two ROM versions are independent). An Extended Color BASIC machine displays its Extended BASIC version.

Those machines which shipped without the Extended BASIC ROM could be upgraded (in most cases) simply by plugging the expansion ROM into the appropriate empty socket. The remaining machines shipped with the ROM already in place.

The BASIC command 'EXEC 41175' will display the Color BASIC ROM version in an Extended Color BASIC machine.

== Keyboards ==

Before long, Radio Shack began to offer an additional model of the CoCo 2: one with Extended Color BASIC and 64 kilobytes of RAM already installed. This machine also shipped with a newly-designed keyboard, with greater key travel than either of the previous styles. Every new CoCo 2 began to ship with this new, 'enhanced' keyboard. Note that late-model CoCo 1 chicklet keyboards, all CoCo 2 keyboards, and even CoCo 3 keyboards use the same type of mylar ribbon cables and are interchangeable.

The CoCo 3 keyboard (and some third-party designs) utilize previously-unused positions in the CoCo's keyboard matrix, adding several new keys. Appropriate software can make use of the extra keys on any CoCo model. Note that the style (appearance, key travel, etc.) of the CoCo 3 keyboard is identical to that of the later CoCo 2 keyboard, with the exception of its extra keys.

== Labels as an indication of model differences ==

Radio Shack switched, during the production of the CoCo 2, from the use of the 'TRS-80' label to the 'Tandy' label on its computer products. For this reason, the CoCo 2 can be found with either label. The vast majority of samples seen and possessed by the author display the TRS-80 label. The Tandy label appears to coincide accurately with yet another variation among CoCo 2 models: the presence of the enhanced MC6847T1 VDG (Video Display Generator) chip therein. Every original CoCo and the majority of CoCo 2s (those displaying the TRS-80 label) use the earlier MC6847. As its name implies, the VDG generates the CoCo's video output. The plain 6847 version contains only uppercase characters in its internal character set, whereas the 6847T1 also contains lowercase characters. Note that software and hardware solutions have been created to overcome this limitation of the 6847, without which lowercase characters are displayed as reverse-video uppercase characters. Conversely, while the 6847T1 is capable of generating true hardware-based lowercase, that capability is seldom exploited.

NOTE: Information is still being compiled and confirmed about the various models, particularly those in the A- and B-series. Updates will likely be forthcoming......

= References =

* http://users.digitalindigo.net/techno/coco2.html
* https://web.archive.org/web/20150325023609/www.tandycoco.com/coco2.shtml

[[Category:Hardware]]

Color Computer 2

2022-07-13T14:58:27Z

MagicFab: /* 26-3127B (64K ECB ) */ Added detailed info on lowercase on 2B models

[[File:Coco2.Gif|thumb|Color computer 2]]

= Models =

The CoCo2 was first released in September of 1983.

* CB = Color Basic
* ECB = Extended Color Basic

== 26-3026, 26-3026A, 26-3026B model (16K CB ) - September 1983 ==
The first CoCo 2 model released included 16K RAM with standard Color BASIC and was listed in Radio Shack catalogs at U$239.95. The case was a bit smaller than the original CoCo, very similar to the TDP-100. The keyboard was much better than the original CoCo "chicklet" keyboard. They were lower profile than typical modern PC keyboards and the keys were recessed in the center, giving them a "melted" look - a term now used to describe this model.

The circuit boards were revised to be a bit smaller than previous models and were equipped to run a full 64K. Most of its chips are socketed. This machine is based on the #8709416 PC board, and has a large, upright RF modulator with integrated TV channel 3/4 switch.

Also characteristic of this machine is the use of a large power supply pass transistor (in a TO-3 package). The two 24-pin ROM sockets are located near the cartridge/system bus connector, and the eight RAM chips are located in a single row under the keyboard.

This same model number has reportedly been found on larger, Korean-made CoCo models in Australia.

There are two possible versions (and 'A' and 'B') for this catalog number.

== 26-3027 (16K ECB), 26-3003 (64K ECB) ==
This 16K ECB model was listed for $319.95, $399.95 for 64K. A 64K RAM upgrade (26-3017) was "only" $149, and the Extended BASIC ROM upgrade was $79.95, making the $399.95 26-3003 a relative bargain (add the ROM and RAM upgrade to a 16K basic model the total price was $468.90).

The 26-3027 model is identical to the 26-3026, with the exception that it already has the Extended BASIC ROM factory-installed.

There are two possible versions (and 'A' and 'B') for the 26-3027 catalog number.

=== RAM upgrade ===

To upgrade the 26-3026 or 26-3027 to 64 KB of RAM, it is necessary to replace the eight 8040517 chips with 4164 chips of 200 ns or better access time, and to solder a wire between the two pads labeled W1. W1 is located between U6 and U7.

Example documented upgrades :
* [https://www.st-hubert.org/phase2/truepages/elec0006.html 26-3026 model 16K to 64K upgrade]

== 26-3127 (64K, ECB), 26-3127B ==

This is the first '64K Color Computer 2'. It also featured the 'enhanced' keyboard, otherwise, it is identical to the 26-3026/26-3027.

=== RAM replacement ===

Note that the RAM is soldered in place in those machines which were factory-equipped with 64K, making replacement thereof a bit more difficult if necessary. For this reason, the 26-3026 and 26-3027 variants are favorites among CoCo 2 enthusiasts.

== The Korean-made CoCo 2s ==

=== 26-3134 (16K CB), 26-3136 (16K ECB) ===

The 26-3134 model is the first Korean-made 16K Color BASIC CoCo 2. It uses the #20261043 circuit board, which differs considerably from that used in the earlier USA-made models. Virtually every component on the board has been relocated. The RF modulator is now a smaller unit, lying flat on the board rather than standing upright, and the channel 3/4 switch has been moved to the main board from the modulator. The positions of the various switches and connectors on the PC board (and therefore on the rear panel) differ from those of the previous machines as well. The RAM chips are located in two rows (one of five and one of three chips).

This machine has a metal 'cage' surrounding the power transformer, which was not present in previous models. The power supply utilizes a cooler-running pass transistor (in a TO-220 package). The RF modulator, power transformer, pass transistor, and switch/jack location characteristics of this machine persist on all subsequent models. Most chips are soldered in place on this and all subsequent boards as well.

The 26-3136 model is identical to the 26-3134, but with the Extended BASIC ROM factory-installed.

=== 26-3134A (16K CB 1.3), 26-3136A (16K ECB) ===

The 26-3134A model is the next Korean 16K Color BASIC CoCo 2. It utilizes a #20261044 circuit board, which differs considerably from the previous versions.

The 26-3136A model is the 16K Extended BASIC version of the 26-3134A.

==== ROM upgrade ====
The 26-3134A model board's ROM design has yet to be confirmed.

The 26-3136A model uses a single 28-pin, 16-kilobyte ROM containing both Color BASIC and Extended BASIC.

=== 26-3134B (16K CB 1.3), 26-3136B (16K ECB) ===

The 26-3134B model is the last Korean 16K Color BASIC model. It uses the #20261058 circuit board, which is similar to the #20261044 board. It uses two 4416 RAM chips and a 24-pin Color BASIC 1.3 ROM in a 28-pin socket as well. However, in addition to the 4416/4464 sockets and special daughter board connectors, there are pads on the board allowing direct factory installation of eight 4164 chips. This is also the board which contains the newer 6847T1 VDG chip (which is not pin-compatible with the earlier 6847).

The 26-3136B model is the Extended BASIC version of the 26-3134B.

=== RAM upgrades for all Korean models ===

These 64K RAM upgrade notes apply to 26-3134A, 26-3136A, 26-3134B, or 26-3136B models ONLY.

The board's RAM is in the form of two socketed 4416 chips. The preferred 64K upgrade these models involves replacing them with two 4464 chips of 200 ns or better access time and to solder a jumper across the two pads labeled RAM SIZE 64K. The RAM SIZE 64K jumper is located next to IC4.

For the 26-3134A model the option also exists (by means of several special connectors on the board) of a factory upgrade consisting of eight 4164 chips on a daughter board. Legend has it that the option of using either 4164s or 4464s was incorporated for economic reasons (the pricing and availability of RAM were quite unstable when these machines were manufactured). Additionally, this board introduces the use of a single 28-pin ROM socket. A 24-pin ROM containing only Color BASIC 1.3 shipped in that socket in this model. With appropriate jumpering, this socket is able to accept a 27128 EPROM.

== 26-3127B (64K ECB ) (some with lowercase support) ==

The last Korean-made model number associated with the 64K ECB CoCo 2, this is an odd one indeed.

Some of the 26-3127B CoCo 2 models are known to have been produced with different Video Display Generator (VDG) chips, either the [[Motorola 6847|Motorola MC6847 or the enhanced MC6847T1]] (marked XC80652P, [https://colorcomputerarchive.com/repo/Documents/Datasheets/MC6847T1%20MOS%20Video%20Display%20Generator%20%28Motorola%29.pdf#page=23 spec sheet]). In comparison, the CoCo3 does not have a real 6847, it has a custom chip (the ACVC) with an internal character generator ROM.

Among these models we find :
* A USA-made TRS-80 with a #20261044 board and a 6847
* A USA-made Tandy with a #20261058 board and a 6847T1
* A Korean-made Tandy with a #20261058 board and a 6847T1.

They were three distinctly different machines, each bearing this same exact 26-3127B model number. This VDG chip is also known as the 6847 or 6847T1, the T1 version would include a lowercase character set.

Contrary to some rumors, the presence of the 'B' in the model number does NOT necessarily indicate the presence of a 6847T1. As noted previously, the Tandy label appears to be the best external indication thereof.

One absolutely accurate method of determining if one is present is to type a '0' (zero) on an operating machine. If the resulting character on the screen is displayed with a slash through it, the machine in question has a 6847T1.

* [https://bigcode.wordpress.com/2020/05/09/tandy-coco-2b-true-lowercase-fonts/ Tandy Coco 2B true lowercase fonts]
* [https://stardot.org.uk/forums/viewtopic.php?f=44&t=22505 6847t1 Font Mystery]
* [https://damieng.com/blog/2016/08/09/typography-in-bits-for-a-few-pixels-more/ Typography in bits: For a few pixels more]
* [http://www.cocovga.com/documentation/system-identification/korean-made-coco-2-identification/ Korean-Made CoCo 2 Identification (either 6847 or 6847T1)]

= Pricing =
Prices dropped quickly. In mid 1984 RS cut the price for the 16K standard model to $159.95 and the 16K Extended BASIC model to $199.95. Production then shifted from Tandy's US plant to a Korean subcontractor. Those models appeared in mid 1984 at the same prices as the previous models, with new model numbers and revised circuit boards. For Christmas 1984 prices were reduced -- $99.95 for a standard Color BASIC 16K model (31-3134), $139.95 for 16K and Extended Color BASIC (31-3136), and $199.95 with 64K and Extended Color BASIC (31-3127). Prices continued to drop as the home computer market got very competitive and IBM PC clones started coming down in price.

To put these prices in perspective, the new for 1985 Tandy 1000, which was an IBM PC clone (actually an enhanced IBM PC Jr. clone that could be upgraded to standard IBM PC specs) was listed at $1199 with 128K RAM and a single 360K floppy drive. An RF modulator could be purchased ($24.95) to use a standard TV as a display (limited to 40 columns) or a digital $159.95 monochrome/$549.95 color monitor could be used. The CoCo 2 was a relative bargain, although there were a few IBM clones that could be purchased a bit cheaper than the Tandy 1000. In 1987 the Tandy 1000SX was priced at $849 with 384K of RAM and one 360K floppy drive.

The final CoCo2 was listed in the 1987 Tandy catalog for only $99.95 with 64K and Extended Color BASIC.

= Differences =
[http://users.digitalindigo.net/~techno/coco2.html Extracted from]
The CoCo 2, introduced in 1983, is basically a refinement of Radio Shack's original TRS-80 Color Computer. It utilizes a more efficient power supply, higher integration (lower parts count), and a smaller case. The primary goal of these modifications was most likely to lower its manufacturing cost. The only significant functional difference between the two is the absence in the CoCo 2 of a regulated +12VDC power supply. One of the few devices which actually requires this power source is the first-generation floppy disk controller sold for the original CoCo. All subsequent controllers operate exclusively from the +5VDC line.
The CoCo 2 was initially offered with 16 kilobytes of RAM, with the option of upgrading it to 64 kilobytes. Doing so requires considerably less effort than in previous models (typically replacing the RAM chips and soldering one jumper).

While the original CoCo used a keyboard with small, flat, square keys (usually referred to as the 'chicklet' keyboard) and a gray-colored case, the CoCo 2 brought with it a more 'modern' off-white case and a keyboard with 'sculptured' keys. Some describe these early CoCo 2 keyboards as having keys which appear to be 'melted'. The travel distance of said keys is fairly low, as with the chicklet keyboard.

= Upgrading your CoCo 2 =

'''CAUTION! DO NOT ATTEMPT TO UPGRADE ANY CoCo RAM OR ROM WITHOUT FIRST SECURING SPECIFIC UPGRADE INSTRUCTIONS FOR YOUR MACHINE!'''

Please note that improper upgrade attempts have been known to destroy the majority of the chips in a CoCo!

== RAM ==

Note also that the RAM chips used in the 16K CoCo 2 are not the 4116s which one might have expected. The 4116 requires additional power supply voltages not supplied by the CoCo 2. Therefore, a special 16K by 1 bit RAM chip requiring only +5VDC is used. This chip has the Tandy house number 8040517.

The RAM used in most 64K CoCo 2s consists of standard 4164 chips.

CoCo 2 RAM upgrade information may be found below in the sections specific to each 16K CoCo 2 version.

== ROMs ==

Like the original Color Computer, the CoCo 2 has provisions for two ROMs. Each consists (in most cases) of 8 kilobytes of data in a 24-pin ROM chip :

* '''Color BASIC'''
The Color BASIC ROM is present in every CoCo. It contains the minimal BASIC interpreter and necessary routines to drive the machine's keyboard, video circuitry, and I/O ports. Most CoCo 2s use version 1.2 of the Color BASIC ROM (the two ROM versions are independent). A Color BASIC machine displays its Color BASIC version at powerup.

* '''Extended Color BASIC'''
The optional Extended BASIC ROM adds extra graphics commands and other assorted functionality enhancements. Extended Color BASIC (the composite of both ROMs) is also required in order to utilize a floppy disk controller on a CoCo. Extended CoCo 2s use version 1.1 of Extended BASIC (the two ROM versions are independent). An Extended Color BASIC machine displays its Extended BASIC version.

Those machines which shipped without the Extended BASIC ROM could be upgraded (in most cases) simply by plugging the expansion ROM into the appropriate empty socket. The remaining machines shipped with the ROM already in place.

The BASIC command 'EXEC 41175' will display the Color BASIC ROM version in an Extended Color BASIC machine.

== Keyboards ==

Before long, Radio Shack began to offer an additional model of the CoCo 2: one with Extended Color BASIC and 64 kilobytes of RAM already installed. This machine also shipped with a newly-designed keyboard, with greater key travel than either of the previous styles. Every new CoCo 2 began to ship with this new, 'enhanced' keyboard. Note that late-model CoCo 1 chicklet keyboards, all CoCo 2 keyboards, and even CoCo 3 keyboards use the same type of mylar ribbon cables and are interchangeable.

The CoCo 3 keyboard (and some third-party designs) utilize previously-unused positions in the CoCo's keyboard matrix, adding several new keys. Appropriate software can make use of the extra keys on any CoCo model. Note that the style (appearance, key travel, etc.) of the CoCo 3 keyboard is identical to that of the later CoCo 2 keyboard, with the exception of its extra keys.

== Labels as an indication of model differences ==

Radio Shack switched, during the production of the CoCo 2, from the use of the 'TRS-80' label to the 'Tandy' label on its computer products. For this reason, the CoCo 2 can be found with either label. The vast majority of samples seen and possessed by the author display the TRS-80 label. The Tandy label appears to coincide accurately with yet another variation among CoCo 2 models: the presence of the enhanced MC6847T1 VDG (Video Display Generator) chip therein. Every original CoCo and the majority of CoCo 2s (those displaying the TRS-80 label) use the earlier MC6847. As its name implies, the VDG generates the CoCo's video output. The plain 6847 version contains only uppercase characters in its internal character set, whereas the 6847T1 also contains lowercase characters. Note that software and hardware solutions have been created to overcome this limitation of the 6847, without which lowercase characters are displayed as reverse-video uppercase characters. Conversely, while the 6847T1 is capable of generating true hardware-based lowercase, that capability is seldom exploited.

NOTE: Information is still being compiled and confirmed about the various models, particularly those in the A- and B-series. Updates will likely be forthcoming......

= References =

* http://users.digitalindigo.net/techno/coco2.html
* https://web.archive.org/web/20150325023609/www.tandycoco.com/coco2.shtml

[[Category:Hardware]]