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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. Built-in devices (such as the SAM, GIME, PIAs, etc) are not included.


* FF40-FF4B Floppy Disk Controllers. See [[Hardware#Floppy_Disk_Controllers]] for list.
* FF40-FF4B Floppy Disk Controllers. See [[Hardware#Floppy_Disk_Controllers]] for list.

Revision as of 17:38, 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. Built-in devices (such as the SAM, GIME, PIAs, etc) are not included.

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

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