Interrupt Assignments - Asus P5V-X SE User Manual

1.8.3

Interrupt assignments

IRQ Priority
0
1
2
4
5
6
7
8
9
10
11
12
13
14
15
* These IRQs are usually available for ISA or PCI devices.
IRQ assignments for this motherboard
PCI slot 1
PCI slot 2
PCI slot 3
PCI slot 4
PCIe x16 slot
Onboard USB controller 1
Onboard USB controller 2
Onboard USB controller 3
Onboard USB controller 4
Onboard USB 2.0 contoller
Onboard LAN
Onboard audio
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.
1-22
Standard function
1 System Timer
2 Keyboard Controller
– Redirect to IRQ#9
12 Communications Port (COM1)*
13 IRQ Holder for PCI Steering*
14 Floppy Disk Controller
15 Printer Port (LPT1)*
3 System CMOS/Real Time Clock
4 IRQ Holder for PCI Steering*
5 IRQ Holder for PCI Steering*
6 PCI-E x16
7 PS/2 Compatible Mouse Port*
8 Numeric Data Processor
9 Primary IDE Channel
10 Secondary IDE Channel
A
–
–
–
shared
Fixed Fixed Fixed Fixed
shared
–
–
–
–
shared
–
B C D
shared – –
– shared –
– – shared
– – –
– – –
shared – –
– shared –
– – shared
– shared –
– – –
shared – –
Chapter 1: Product introduction