ps2owk
PS/2 to One-Wire-Keyboard adapter.
Adapter for various retro computer keyboards using only one wire for data transfer. One hardware - multiple firmware. Currently supported:
- PC-8801MA (type C keyboard, I guess)
- FM-77AV
Original project page: http://zxdesu.byethost32.com/2018/02/13/pc-8801-keyboard-adapter/