1bit CPU using relays. (Reg A = T-FF Type)
The switches are, from top left: reset, clock with manual/automatic switching, ROM(0,1), and ROM(2,3).
The barley balls are indicated from top to bottom as Reg A, PC, and Clock.
There are only two instructions as follows
0 ADD A, Im
1 JMP Im
As an example, for a program that continuously adds 1 to A Reg, the ROM switch is OFF, ON, ON, OFF.
This idea came from https://naoto64.github.io/1bit-CPU/
