I don't quite remember how this project started, but I somehow ended up with a Seequa Chameleon mainboard, a copy of "Build Your Own Z80 Computer", and an insatiable urge to build a computer. I removed the Z80A processor form the Chameleon's mainboard, and followed the instructions in the book to make a primitive computer. I ran a single program on it before I got bored and started a more interesting project.
Specifications:
| CPU | Zilog Z80A |
| Clock | 4 MHz |
| ROM | 32 KiB |
| RAM | 32 KiB on board, but unused |
Files:
Note that the schematics here are not the same as the ones I used, but are slightly modified with the goal of making an easy-to-use processor card.
Z80 Computer Schematic (pdf)