START — opcode $00¶
START — the reset record: RESET clears the instruction register, so the machine runs this record first - it fetches from PC = 0 and goes
| Operands | Bytes | Microcode steps |
|---|---|---|
| — | — | 4 |
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