These are the common addresses and interrupts used on personal computers.
| DEVICE |
ADDRESS |
INTERRUPT |
| COM1 |
3F8h |
IRQ4 |
| COM2 |
2F8h |
IRQ3 |
| COM3 |
3E8h |
IRQ4 |
| COM4 |
2E8h |
IRQ3 |
| LPT1 |
378h |
IRQ7 |
| LPT2 |
278h |
IRQ5 |
| Floppy Disk |
3F0h |
IRQ6 |
| Real Time Clock |
|
IRQ8 |
| Redirected to IRQ2 |
|
IRQ9 |
| Math Coprocessor |
0F0h |
IRQ13 |
| Hard disk |
1F0h |
IRQ14 |