About This Video
Join me as I upgrade my Radio Shack TRS-80 Color Computer 3 from its stock 128K memory configuration to 512K of RAM using the TRIAD SRAM upgrade board from Cloud-9.
Released in 1986, the Tandy CoCo 3 added improved graphics and expanded memory capabilities to the TRS-80 Color Computer line while retaining the Motorola 6809E processor.
Upgrade Process:
- Opening the CoCo 3 case
- Removing the factory-installed memory chips
- Installing the Cloud-9 TRIAD 512K SRAM board
- Replacing the 128K badge with a 512K badge
- Power-on testing after installation
Upgrade Benefits:
- Expansion from 128K to 512K of RAM
- Support for more advanced software
- Improved expandability
Future Upgrades Discussed:
- Motherboard recap
- Hitachi 63B09E CPU upgrade
With the TRIAD board installed, my CoCo 3 now has four times its original memory and is ready for software that can take advantage of the additional RAM. I also replace the original 128K badge with a 512K badge to match the upgraded configuration.
For more information, check out my Tandy Color Computer 3 System Guide.