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2-20 Chapter 2: Hardware information
2.5.3 Interrupt assignments
IRQ assignments for this motherboard
A B C D E F G H
PCI_1 fixed – – – – – – –
PCI_2 – fixed – – – – – –
USB 1.1 – – – – – – – –
USB 2.0 – – – – – – – –
IDE controller – – – – – – – –
HD audio – – – – – – – –
PCIEx16_1 – – – – fixed – – –
PCIEx16_2 – – – – shared – –
PCIEx1_1 – – – – – – fixed –
PCIEx1_2 – – – – shared – –
SATA1 – – – – – – – –
SATA2 – – – – – – – –
LAN – – – – – – – –
1394 – – fixed – – – – –
IRQ Standard function
0 System timer
1 Standard 101/102-key or Microsoft Natural PS/2 Keyboard
4 Communications Port (COM1)*
6 Standard floppy disk controller
8 System CMOS/real-time clock
9 Microsoft ACPI-compliant system
12 PS/2 compatible mouse port
13 Numeric data processor
11 NVIDIA nForce PCI System Management
16 NVIDIA GeForce 6800 Series GPU
18 VIA OHCI Compliant IEEE 1394 Host Controller
20 NVIDIA Network Bus Enumerator
20 Standard Enhanced PCI to USB Host Controller
22 Microsoft UAA Bus Driver for High Definition Audio
22 NVIDIA nForce Serial ATA Controller
23 NVIDIA nForce Serial ATA Controller
23 Standard OpenHCD USB Host Controller