Cracking open the Radio Shack TRS-80 CoCo

While the CoCo supported memory and games cartridges, floppy disks and other peripherals, they could only connect through an expansion slot on the side or sockets at the back of the case. Tandy saw the CoCo as a consumer electronics item, and actively dissuaded anyone from adding internal modifications. That didn't stop enthusiasts, however, and a lively community sprang up in the US to push both hardware and software in unofficial directions.

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