2-14 Chapter 2: Hardware information
Chapter 2
2.5.3 Interrupt assignments
Standard interrupt assignments
* These IRQs are usually available for PCI devices.
IRQ Priority Standard function
0
1 System Timer
1 2 Keyboard Controller
2 – Redirect to IRQ#9
4 12 Communications Port (COM1)*
5 13 IRQ Holder for PCI Steering*
6 14 Reserved
7 15 Reserved
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 Reserved
13 8 Numeric Data Processor
14 9 Primary IDE Channel
IRQ assignments for this motherboard
A B C D E F G H
PCIE x16 – – shared – – – – –
PCIE x1_1 – shared – – – – – –
PCIE x1_2 – – shared – – – – –
PCI1 – – – – shared – – –
LAN – – shared – – – – –
Onboard 880G Video
Controller
– – shared – – – – –
USB 3.0 controller – – – shared – – – –
Onchip SATA Controller – – – shared – – – –
HD Audio shared – – – – – – –
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