Product Overview
Combine this PCB with a few TTL ICs, 2 256kBx8 SRAMs, and a few passives and enjoy 512kB of RAM Expansion for your TANDY Color Computer 3.
It's not the cheapest way to get 512kB for your CoCo3, but booting your unit after assembling this PCB will provide some additional satisfaction. All parts are through hole for easy assembly.
For more information, including design files, please see: https://github.com/go4retro/HalfMegCoCo
Complexity: Low
Time to assemble: 1-2 hours for a novice, 15-30 minutes for skilled users.
Bonus!: If you have a spare DAT (Dynamic Address Translation) board lying around, you can populate this PCB with 512kBx8 SRAMs and have 1MB of memory at your fingertips.
