| IRQ | Assignment | I/O Assignment |
| 0 | system timer | 040-043 |
| 1 | keyboard | 060-064 |
| 2 | link to IRQ9 for IRQs >IRQ7 | 0A0-0A1 |
| 3 | Com2 & Com4 | 2F8-2FF |
| 4 | Com1 & Com3 | 3F8-3FF |
| 5 | LPT2 or SND Card | 1F0-1F8 |
| 6 | Floppy Disk | 3F0-3F7 |
| 7 | LPT1 | 378-37F |
| 8 | System Clock | 070-07F |
| 9 | Link to IRQ2 | N/A |
| 10 | Available | N/A |
| 11 | Laptop PC Cards | N/A |
| 12 | Bus Mouse | 238-23B |
| 13 | Math Coprocessor | 0F8-0FF |
| 14 | IDE Hard Drive | N/A |
| 15 | Secondary HD | N/A |