Interrupt Assignments - Asus P7P55D - Motherboard - ATX User Manual

2.5.3

Interrupt assignments

Standard interrupt assignments
IRQ Priority Standard function
0 1
1 2
2 –
4 12
5 13
7 14
8 3
9 4
10 5
11 6
12 7
13 8
14 9
* These IRQs are usually available for PCI devices.
IRQ assignments for this motherboard
PCIE x16_1
PCIE x16_2
USB 2.0 controller 1 shared
USB 2.0 controller 2
HD audio
Onboard SATA
ASUS P7P55D
System Timer
Keyboard Controller
Redirect to IRQ#9
Communications Port (COM1)*
IRQ Holder for PCI Steering*
Reserved
System CMOS/Real Time Clock
IRQ Holder for PCI Steering*
IRQ Holder for PCI Steering*
IRQ Holder for PCI Steering*
Reserved
Numeric Data Processor
Primary IDE Channel
A B C
shared – –
– shared –
– –
– – –
– – –
– – –
D E F
– – –
– – –
– – –
– – –
– – –
– shared
G H
– –
– –
– –
– shared
shared –
– –
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