you may want to build this 2-bit paper processor and learn how it works first. It should teach you the basic concepts you need to understand the 1-bit version. As you can see in the image above ...

Each CPU address really addresses a block of ... and the second is for a true flag register. The I/O is a bit peculiar. Each phase 1 instruction selects an input to store in the flag register ...

Bit slice processors used arithmetic logic units (ALUs) that typically came in 4-bit increments, although 1- and 2-bit devices were also made. Connected to a control unit, the ALU slices were ...