This is an EPROM Cartridge for the Tandy Radio Shack TRS-80 Color Computer 1,2 and 3. It will probably work with the Dragon Data Dragon computers as well. It uses a 27C512 EPROM jumper selected as two 32K banks. The CoCo 1, 2 and Dragon can only access the first 16K of each bank. The CoCo 3 can access the entire 32K of each bank, minus the 0xFFnn I/O and Vector page. The project has been shared to github: https://github.com/TheLittleEngineers/CC2-32K-EPROM-CARTRIDGE-2012-V2R0. Many other similar cartridges are forthcoming. There are much better designs in my possession and I intend to post them all, in no particular order. The project is released under a Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) License [https://creativecommons.org/licenses/by-sa/4.0/] github: https://github.com/TheLittleEngineers/CC2-32K-EPROM-CARTRIDGE-2012-V2R0 OSHpark: https://oshpark.com/shared_projects/wl9Kmtit Please note: This is derived from an original design by "Little" John Eric and/or his father "Big" John Robert (J.R.) by "Uncle" Robert Allen. It should be thoroughly scrutinized and verified prior to actual use of any kind. DISCLAIMER: The following article is provided for informational purposes only. Any attempt to modify your computer without the proper skills to do so may void your computer. Any attempt to modify your computer without unplugging it first may void you. This Information is provided "as-is" with no guarantee of fitness for any purpose, either explicit or implied. We disclaim any and all responsibility for losses incurred through the use of this information. By using this information, you are deemed to have accepted these conditions of use, and you agree NOT to sue us. CLARIFICATION: The above disclaimer states as plainly as possible that if you decide to make use of any of the information contained within this document that you do so at your own risk. Designing hardware for the CoCo (ColorComputer) and other vintage hardware is a hobby of ours and is not motivated by any desire of profits. As this is a not for profit venture, obviously we can't afford not to disclaim the use of this information.