Specifications

1-22 Chapter 1: Product introduction
1.8.3 Interrupt assignments
IRQ Priority Standard Function
0 1 System Timer
1 2 Keyboard Controller
2 — —
3 11 IRQ holder for PCI steering*
4 12 Communications Port (COM1)
5 13 Standard IRQ holder for PCI steering
6 14 Floppy Disk Controller
7 15 Printer Port (LPT1)
8 3 System CMOS/Real Time Clock
9 4 Microsoft ACPI-Compliant Sytem
10 5 IRQ holder for PCI steering*
11 6 IRQ holder for PCI steering*
12 7 PS/2 Compatible Mouse Port
13 8 Numeric Data Processor
14 9 Primary IDE Channel
* These IRQs are usually available for PCI devices.
A B C D E F G H
PCI1 — — — — shared — — —
PCI2 — — — — — shared — —
PCI3 — — — — — — shared —
PCIEx16_1 shared — — — — — — —
PCIEx1_1 shared — — — — — — —
PCIEx1_2 — shared — — — — — —
PCIEx1_3 — — shared — — — — —
USB controller 1 — — — — — — — shared
USB controller 2 — — — shared — — — —
USB controller 3 — — shared — — — — —
USB controller 4 shared — — — — — — —
USB 2.0 controller — — — — — — — shared
HD audio shared — — — — — — —
LAN — Used — — — — — —
Standard interrupt assignments
IRQ assignments for this motherboard