Standard Interrupt Assignments; Irq Assignments For This Motherboard - Asus P5V900 Manual

Standard interrupt assignments

IRQ Standard Function
0 System Timer
1 Keyboard Controller
2 Re-direct to IRQ#9
4 Communications Port (COM1)*
5 IRQ holder for PCI steering*
6 Floppy Disk Controller
7 Printer Port (LPT1)*
8 System CMOS/Real Time Clock
9 IRQ holder for PCI steering*
10 IRQ holder for PCI steering*
11 IRQ holder for PCI steering*
12 PS/2 Compatible Mouse Port*
13 Numeric Data Processor
14 Primary IDE Channel
15 Secondary IDE Channel
* These IRQs are usually available for ISA or PCI devices.

IRQ assignments for this motherboard

PCI slot 1
PCI slot 2
PCI Express x16 slot
PCI Express x1 slot
Onboard USB controller 1
Onboard USB controller 2
Onboard USB controller 3
Onboard USB controller 4
Onboard USB 2.0 controller
Onboard IDE port
Onboard HD audio
Onboard LAN
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 V-Series P5V900
A B C
shared — —
— shared —
shared — —
— shared —
— — —
— — —
— — shared
— — —
— — —
— — —
shared — —
— shared —
D E F
— — —
— — —
— — —
— — —
— — —
shared — —
— — —
shared — —
— — —
shared — —
— — —
— — —
G H
— —
— —
— —
— —
— shared
— —
— —
— —
— shared
— —
— —
— —
2-13