Since a while I've notived Giudo Lehwalders port of the RunCPM Z80 Emulator to the Pi pico. It features a SD Card reader and a fully installed CP/M system.

I never used or owned a Z80 computer, but I had this 2$ Pi pico in a drawer. The next logical step was to order the 2$ SD card reader and wire it up (not beautiful, but working):

The build little computer is being attatched to the USB port of a computer and can be accessed via a terminal program like Teraterm or Putty.

It simply works! Very smooth and funny to use, enough free space on the SD card for all CP/M programs ever written I think.

Guido's Git with the compiled binaries can be found here:
https://github.com/guidol70/RunCPM_RPi_Pico
The original author of RunCPM also offers a huge library with old Z80 CP/M software:
https://github.com/MockbaTheBorg/RunCPM

A really small project to play with and dive into the CP/M world.

Have fun, stay childish,

Webdoctor