Intel MCS-80 System Design Kit (SDK-80)

GW-SDK80-RAM1, a RAM Expansion Board for the SDK-80

With my SDK-80 cleaned up, I wanted a way to add more RAM and test out some ideas without permanently modifying the board. Enter GW-SDK80-RAM1, a small mezzanine board that carries 64K of RAM, ROM remap circuitry, and substitutes for the 8212 address bus buffers.

Debugging and Cleanup of an Intel SDK-80

The Intel MCS-80 System Design Kit (SDK-80) was Intel's official rapid prototyping single-board computer for the MCS-80 family, which centers around the Intel 8080 microprocessor. This SDK-80 arrived with extensive modification in the user prototype area, and was not working. To restore function, all circuitry in the prototype area had to be removed. Plenty of cleanup work was involved, read on for an overview of the original condition and progress through cleanup.