lelandbatey / custom_cpu--register

KiCAD designs for the CPU register module of Ben Eater's home-made CPU

CPU Register

This repo contains PCB designs for the second component of Ben Eater's educational 8-bit CPU, the CPU registers. You can watch Mr. Eaters fantastic series on designing and building this CPU on his Youtube channel.

Each CPU will need three of these registers, one to act as the instruction register, one as the A register, and one as the B register. The difference between the A/B registers and the instruction register is that the four most significant bits of the instruction register won't be directed back onto the bus, but instead are used as input to the instruction decoder. The design intentionally incorporates fake resistors in between the LED's and the LS74245 which may be used as the point where those four most significant bits are split off towards the instruction decoder.