INT — opcode $FF¶
INT — the interrupt entry: with an interrupt pending and enabled the instruction register takes $FF instead of the fetched opcode; this record pushes the PC and jumps to the interrupt vector
| Operands | Bytes | Microcode steps |
|---|---|---|
| — | — | 26 |
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