Brilliant little machine, the good old 64. You are absolutely right about the zeropage (0x00-0xFF) and the three registers. Two of those three were pretty speci

Brilliant little machine, the good old 64. You are absolutely right about the zeropage (0x00-0xFF) and the three registers. Two of those three were pretty special and limited however. So, I'd say the C64 (and all 6502 or 6510 based systems) had really only one general purpose register.