A set of boards based on this project was my first design of boards for Baffa-2 Homebrew Microcomputer. As I already had my Homebrew Zeddie I decided to prioritize a CP/M machine.

Now  Baffa-81 is done :) more information at https://hackaday.io/project/188406-baffa-81-zx81-compatible-computer

There are three ZX81 boards + CPU and Clock :)