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Chapter 2: Hardware information
Chapter 2
IRQ assignments for this motherboard
A B C D E F G H
PCIEx16_1 shared – – – – – – –
PCIEx16_2 shared – – – – – –
PCIEx16_3 – – – shared – – – –
PCIEx16_4 shared – – – – – – –
PCIEx1_1 shared – – – – – – –
PCI1 shared – – – – – – –
VIA1394 – – – shared – – – –
USB3.0 shared – – – – – – –
LAN1 (82574) – shared –
–
– – – –
LAN2 (82574)
–
– shared – – – – –
SATA Controller 1 – – – shared – – – –
SATA Controller 2 – – – shared – – – –
USB 2.0 Controller 1 – – – – – – – shared
USB 2.0 Controller 2 shared – – – – – – –
HD Audio – – – – – – shared –
IRQ Priority Standard function
0 1 System Timer
1 2 Keyboard Controller
2 - Programmable Interrupt
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
Standard Interrupt assignments