2 layers

Soundcard
GLGPrograms/ceda-76489
A soundcard for Ceda and a music player application running in CP/M
4 parts1
Printed circuit boards designed in KiCad and published on GitHub, each with its parts, layers and size, its README and its files; open any of them in PCBKit.

GLGPrograms/ceda-76489
A soundcard for Ceda and a music player application running in CP/M

GLGPrograms/tinyDiskII
Homemade floppy disk emulator for Apple II series computers