Like the DEC PDP-8, this is a 12-bit machine, but instead of the diode-transistor logic of the DEC, the substantially smaller Q2 uses a simple NMOS approach.

Kyle Hovey has decided to build his own 8-bit CPU from scratch, out of breadboard, NVRAM chips, surface-mount transistors, and lots and lots of wire -- and he's blogged his experience, so you can ...