There have been plenty of Z80 computer builds here on Hackaday, but what sets them apart is what you do with them. [Andrew] writes in with his Z80 single-board computer made from scratch, using the… ...

By default, the debugging is mostly suppressed (although you can change that). You have to issue a serial port command to turn on higher level logging and debug functions.

The controls are wired to an Arduino control board that receives button presses and sends serial commands to a PC running a python script.