Standard interrupt assignments
IRQ | Priority | Standard Function |
0 | 1 | System Timer |
1 | 2 | Keyboard Controller |
2 | N/A | |
3 | 11 | IRQ holder for PCI steering |
4 | 12 | Communications Port (COM1) |
5 | 13 | IRQ holder for PCI steering |
6 | 14 | Floppy Disk Controller |
7 | 15 | Printer Port (LPT1) |
8 | 3 | System CMOS/Real Time Clock |
9 | 4 | IRQ holder for PCI steering |
10 | 5 | IRQ holder for PCI steering |
11 | 6 | IRQ holder for PCI steering |
12 | 7 | PS/2 Compatible Mouse Port |
13 | 8 | Numeric Data Processor |
14 | 9 | Primary IDE Channel |
15 | 10 | Secondary IDE Channel |
IRQ assignments for this motherboard
| A | B | C | D | E | F | G | H |
PCI slot 1 | — | used | — | — | — | — | — | — |
PCI slot 2 | — | — | used | — | — | — | — | — |
PCI slot 3 | — | — | — | used | — | — | — | — |
Onboard USB Controller 1 | — | — | — | — | — | shared | — | — |
Onboard USB Controller 2 | — | — | — | — | — | shared | — | — |
Onboard USB Controller 3 | — | — | — | — | — | shared | — | — |
Onboard USB Controller 4 | — | — | — | — | — | shared | — | — |
Onboard AC97 Audio | — | — | — | — | — | — | used | — |
Onboard LAN | — | — | — | — | — | — | — | used |
When using PCI cards on shared slots, ensure that the drivers support “Share IRQ” or that the cards do not need IRQ assignments; otherwise, conflicts will arise between the two PCI groups, making the system unstable and the card inoperable.
ASUS |