2024-03-02: The wiki ran out of disk space, so things were not working. This has been resolved by adding another 5GB of quota ;-) Thanks to Tim Lindner for reporting the issues. 2020-05-17: If a page gives you an error about some revision not being found, just EDIT the page and the old page should appear in the editor. If it does, just SAVE that and the page should be restored. OS-9 Al (talk) 12:22, 17 May 2020 (CDT)


From CoCopedia - The Tandy/Radio Shack Color Computer Wiki
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Looking for CoCo help? If you are trying to do something with your old Color Computer, read this quick reference. Want to contribute to this wiki? Be sure to read this first. This CoCo wiki project was started on October 29, 2004. --OS-9 Al

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This page was last updated on 11/10/2023. Total Pages: 730. Total Files: 993.

Home / Hardware - 26-3029


This model was introduced for use with the CoCo 2 (as it lacked the original CoCo's +12V power supply), and is also mounted in a long cartridge. Early 26-3029 controllers had a Fujitsu MB8877A (5-volt only equivalent of the WD1793) and are capable of high density 3.5" drive operation. Mike Pepe has a page showing how he upgraded a 26-3029 controller: [1]

Note that most 26-3029 controllers use the WD1773 floppy drive controller chip which IS NOT capable of operating high density floppy drives.


26-3029 'Color Computer Mini Disk' This drive model had a white case, but was still a full-height, vertically-mounted assembly. These first two styles have 34-pin card-edge connectors on their rear panels rather than captive ribbon cables. The addition of extra drives required using additional case/power supply/drive units.

Radio Shack advised owners of the 64K CoCo 1 (26-3003B) to get the External Drive 3 for the Model 4 (26-1161)[2]. While this would solve the problem of the case color matching issue, it created a new and different problem of the case badge no longer having the word "Color" nor the red, green, and blue rectangles.