MediaWiki:Sitenotice:
2025-12-29: I have restored the wiki to a backup from the end of November. Starting in September 2025, accesses went form the 800MB-1.2GB range per month to 26GB in September, 42GB in October, and 70GB in November with most accesses originating from China. As soon as I realized what was causing all the access problems in November, I shut it down (it had reached 36GB by then) behind a password/login screen. The database had gotten corrupted, and I tried a restore from just before the spike in access but that didn't work. Thus, end of November. I still have the other daily backups so if there were any important additions in December, let me know and maybe they can be recovered. - Allen H.
Datasheets: Difference between revisions
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|[[GIME]]||Tandy||Graphics Interrupt Memory Enhancement chip. This custom chip provides most of the "personality" of the Coco 3, including the hi-res graphics modes, ability to access more than 64k and the ability to connect to an RGB monitor.|| || | |[[GIME]]||Tandy||Graphics Interrupt Memory Enhancement chip. This custom chip provides most of the "personality" of the Coco 3, including the hi-res graphics modes, ability to access more than 64k and the ability to connect to an RGB monitor.|| || | ||
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|[[WD1793]]||Western Digital||Floppy disk controller chip. The main component in the floppy disk controller pak, this chip provides functions to control floppy disk drives.|| || | |||
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Revision as of 07:24, 28 September 2014
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Home / Datasheets - Datasheets
Core Components
Components in this table are key components used in the Color Computer and for the most part are family members within Motorola's product line to build 6800/6809/68000 microcomputers.
| Part # | Manufacturer | Description | DataSheet | |
|---|---|---|---|---|
| MC6809E | Motorola | The Central Processing Unit (CPU) used in the Coco 1,2 and 3 | link | |
| MC6821/MC6822 | Motorola | Peripheral Interface Adapter. Two are used in the Coco to interface the 6809 to IO functions. | link | |
| MC6847 | Motorola | Video Display Generator used to generate text on the Coco 1 and 2 | link | |
| MC6884 | Motorola | Synchronous Address Multiplexer (SAM) used on the Coco 1 and 2, Also known as SN7LS783. This chip interfaces the system memory with the CPU and VDG. | link | |
| MCM68A364 | Motorola | Basic and Extended BASIC ROM chips. These Read-Only Memories (ROMs) are programmed in the factory with the Basic interpreter developed by Microsoft and Microware. | link | |
| GIME | Tandy | Graphics Interrupt Memory Enhancement chip. This custom chip provides most of the "personality" of the Coco 3, including the hi-res graphics modes, ability to access more than 64k and the ability to connect to an RGB monitor. | ||
| WD1793 | Western Digital | Floppy disk controller chip. The main component in the floppy disk controller pak, this chip provides functions to control floppy disk drives. |
Additional Components
The following non-core components were used in the Coco models. They are off-the-shelf parts typically used to provide support and minor logic functions on the board. Many of these components will be familiar to electronics experimenters, and are available from several manufacturers.
| Part # | Manufacturer | Description | DataSheet | |
|---|---|---|---|---|
| MC14050B | Motorola | Latch | link | |
| 74LS273 | Octal Flip-Flop | link | ||
| MC14529B | Data Seperator | link | ||
| 74LS138 | Decoder | link | ||
| MC1372 | Motorola | Video Mixer | link | |
| 723C | Common, off-the shelf 5v voltage regulator. | link | ||
| LM339 | Quad Comparator | link | ||
| 741C | Standard [Op-Amp] chip. | link | ||
| 74LS244 | Buffer | link | ||
| 78M12 | Common, off-the-shelf 12v regulator. | link | ||
| 74LS02 | Quad NOR gate | link | ||
| MCM4027AC3 | Motorola | 4k RAM chips. Used in Coco 1 only. | link | |
| MCM90072C | Motorola | 16k RAM chips. | link |