COM-porte
| COM-port | IRQ |
|---|---|
| COM1 | 4 |
| COM2 | 3 |
| COM3 | 5 |
| COM4 | 7 |
IRQ'er
| IRQ | Enhed |
|---|---|
| 0 | System timer |
| 1 | Tastaturcontroller |
| 2 | Afbryde controller |
| 3 | Seriel port 2 (COM2) |
| 4 | Seriel port 1 (COM1) |
| 5 | Parallel port 2 (LPT2) |
| 6 | Floppy disk controller |
| 7 | Seriel port 4 (COM4) |
| 8 | Realtidsur |
| 9 | Parallel port 1 (LPT1) |
| 10 | PS/2 museport |
| 11 | Lydkort |
| 12 | USB-controller |
| 13 | Netværkskort |
| 14 | Modem |
| 15 | Spilport |
