Register Machine Emulator

The pen, representing the program counter, is positioned at the first line of the program. The instruction on that line is processed by modifying the value of a register, or checking if a register is Zero and then moving to the next instruction. The evaluation stops upon reaching a halt or empty instruction.

• CLR(r): Set register r to Zero.
• INC(r): Add 1 to the register r.
• DEC(r): Subtract 1 from register r.
• CPY(a, b): Copy the register a in register b.
• JZ(r, i): If register r is Zero, jump to instruction i.
• JE(a, b, i): If the registers a and b are equal, jump to instruction i.

The classic paper ISAs are the WDR Computer and CARDIAC.

incoming: paper rewriting uxn devlog