Asus P5P800-VM - Interrupt Assignments

ASUS P5P800-VM 1-21
1.8.3 Interrupt assignments
Standard interrupt assignments
IRQ Priority Standard Function
0 1 System Timer
1 2 Keyboard Controller
2 N/A Re-direct to IRQ#9
3 11 Communications Port (COM2)*
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
* These IRQs are usually available for ISA or PCI devices.
IRQ assignments for this motherboard
A B C D E F G H
PCI slot 1 — — — — — — used —
PCI slot 2 — — — — — used — —
PCI slot 3 — shared — — — — — —
Onboard USB controller 1 shared — — — — — — —
Onboard USB controller 2 — — — used — — — —
Onboard USB controller 3 — — used — — — — —
Onboard USB controller 4 shared — — — — — — —
Onboard USB 2.0 controller — — — — — — — shared
Onboard LAN — — — — — — — shared
Onboard audio — shared — — — — — —
Onboard VGA shared — — — — — — —
When using PCI cards on shared slots, ensure that the drivers support
“Share IRQ” or that the cards do not need IRQ assignments. Otherwise,
conicts will arise between the two PCI groups, making the system
unstable and the card inoperable.