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External Hardware IO Address Map: Difference between revisions

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= External Hardware IO Address Map =
= External Hardware IO Address Map =


Tandy designated IO addresses from $FF60 to $FF7F for add-on hardware, but several parties chose to build in the $FF40-$FF5F range as well. Here are known IO addresses for add-on hardware. Built-in devices (such as the SAM, GIME, PIAs, etc) are not included.
Tandy designated IO addresses from $FF60 to $FF7F for add-on hardware, but several parties chose to build in the $FF40-$FF5F and $FF80-FF8F ranges as well. Here are known IO addresses for add-on hardware.  


* FF40-FF4B Floppy Disk Controllers. See [[Hardware#Floppy_Disk_Controllers]] for list.
* FF40-FF4B Floppy Disk Controllers. See [[Hardware#Floppy_Disk_Controllers]] for list.
* FF40-FF4B [[MEGA mini MPI]] Serial UART A (gated via $FF7F)
* FF40-FF4B [[MEGA mini MPI]] Serial UART A (gated via $FF7F)
* FF40-FF45 [[MEGA mini MPI]] Extended MPI Features (gated via $FF7F)
* FF40-FF45 [[MEGA mini MPI]] Extended MPI Features (gated via $FF7F)
* FF40-FF41 [[Game Master Cart]]
* FF41-FF42 Becker Port used by [[CoCo3FPGA]] and some emulators for [[DriveWire]] access
* FF4C-FF4F Some third party Floppy Disk Controlers: [[Sardis Technologies 'no-halt' Controller|Sardis]], [[J&M/Owl-Ware|JFD]], [[Disto Super Disk Controller]], and [[Disto Super Disk Controller II]]
* FF4C-FF4F Some third party Floppy Disk Controlers: [[Sardis Technologies 'no-halt' Controller|Sardis]], [[J&M/Owl-Ware|JFD]], [[Disto Super Disk Controller]], and [[Disto Super Disk Controller II]]
* FF50-FF5F [[Glenside IDE Controller]] (first jumper option)
* FF50-FF5F [[Glenside IDE Controller]] (first jumper option)
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* FF59 [[Cloud-9 miniFLASH]] default address, modified with jumpers
* FF59 [[Cloud-9 miniFLASH]] default address, modified with jumpers
* FF60-FF62 [[X-Pad Model GT-116]]
* FF60-FF62 [[X-Pad Model GT-116]]
* FF64-FF67 [https://www.go4retro.com/products/cocoflash/ Retro Innovations CoCoFLASH]
* FF68-FF6B [[Deluxe RS232 Pak]]
* FF68-FF6B [[Deluxe RS232 Pak]]
* FF68-FF6B [[CoCoIO]] (first jumper option)
* FF6C-FF6F [[Direct Connect Modem Pak]]
* FF6C-FF6F [[Direct Connect Modem Pak]]
* FF6E-FF6F [[MIDI Maestro]]
* FF70-FF7F [[Glenside IDE Controller]] (second jumper option)
* FF70-FF7F [[Glenside IDE Controller]] (second jumper option)
* FF70-FF73 [https://github.com/barberd/coco9511pak Am9511 Arithmetic Processor Unit Pak] (default address, modified with dip switches)
* FF74-FF75 [[Cloud-9 TC^3 SCSI Interface]] default settings, modified with jumpers
* FF74-FF75 [[Cloud-9 TC^3 SCSI Interface]] default settings, modified with jumpers
* FF74-FF77 [[Disto Super Disk Controller II]]
* FF74-FF77 [[Disto Super Disk Controller II]]
* FF7A-FF7B [[Orchestra-90 CC (26-3143)]]
* FF7A-FF7B [[Orchestra-90 CC (26-3143)]]
* FF78-FF7B [[CocoIO]]
* FF78-FF7B [[CocoIO]] (second jumper option)
* FF78-FF79 & FF7C [[Cloud-9 SuperIDE Interface]] Real Time Clock
* FF78-FF79 & FF7C [[Cloud-9 SuperIDE Interface]] Real Time Clock
* FF7D-FF7E [[Speech/Sound Cartridge (26-3144A)]]
* FF7D-FF7E [[Speech/Sound Cartridge (26-3144A)]]
* FF7F [[Multi-Pak]] Slot Selection Register
* FF7F [[Multi-Pak]] Slot Selection Register
* FF80-FF84 [https://colorcomputerarchive.com/repo/Documents/Manuals/Applications/Super%20Voice%20(Speech%20Systems).pdf Speech Systems Super Voice]
* FFE0-FFE9 & FFEF [https://thezippsterzone.com/2019/03/27/gime-x/ GIME-X for CoCo 3]


Note some devices overlap each other; these devices will conflict and cannot be used together without modification.
Note some devices overlap each other; these devices will conflict and cannot be used together without modification.
Built-in IO devices (such as the PIAs ($FF00-FF3F), CoCo3 GIME ($FF90-FFBF), and SAM ($FFC0-FFDF)) also take the IO space. The 6809/6309 CPU uses $FFF0-FFFF for interrupt vectors.

Latest revision as of 18:38, 25 April 2023

External Hardware IO Address Map

Tandy designated IO addresses from $FF60 to $FF7F for add-on hardware, but several parties chose to build in the $FF40-$FF5F and $FF80-FF8F ranges as well. Here are known IO addresses for add-on hardware.

Note some devices overlap each other; these devices will conflict and cannot be used together without modification.

Built-in IO devices (such as the PIAs ($FF00-FF3F), CoCo3 GIME ($FF90-FFBF), and SAM ($FFC0-FFDF)) also take the IO space. The 6809/6309 CPU uses $FFF0-FFFF for interrupt vectors.