SUBI — opcode $B1¶
SUBI byte — ACC ← ACC − byte (carry: ← borrow (hardware only, see note))
| Operands | Bytes | Microcode steps |
|---|---|---|
| byte | 2 | 12 |
One column per microcode step. The control lines are read from the microcode image; the address bus, data bus and registers at the bottom are a model. How to read the diagrams · the instruction set