Welcome to the github repo for my 8 bit breadboard CPU. I will add info and documentation as the project progresses.
unmarked image on bottom (04/2024)
- 8 bit data, 8/16/.. bit instructions (up to 65.5k)
- 256B RAM, direct + indirect addressing
- Up to 65.5k instructions; 256 types, each up to 16 µstep
- Harvard architecture (to not need bootloader)
- Hook up I2C display
- Test full instruction set
- Add more complex instructions (stack?)
- (add kicad project)
- (add high level schematic)
- (EEPROM-arduino\display-decoder => negative number support)
- (Test driving I2C display without any libs)
- (Compiler)
Current state: all connectivity tested (with some jumper wires still). Basic instructions (+fibonacci program) functional, flags not connected to control yet.
