1-22
Chapter 1: Product introduction
1.8.3
Interrupt assignments
Standard interrupt assignments
IRQ
Standard Function
0
High precision event timer
1
Standard 101/102-key or Microsoft PS/2 keyboard
4
Communicators Port (COM1)
6
Standard floppy disk controller
8
High precision event timer
9
Microsoft ACPI-Compliant System
12
PS/2 Compatible Mouse
13
Numeric data processor
11
NVIDIA nForce PCI System Management
20
Standard OpenHCD USB Host Controller
21
Microsoft UAA Bus Driver for High Definition Audio
21
Standard Dual Channel PCI IDE Controller
22
NVIDIA GeForce 7050 / nForce 610i
22
Standard Enhanced PCI to USB Host Controller
23
NVIDIA Network Bus Enumerator
* These IRQs are usually available for ISA or PCI devices.
1.8.2
Configuring an
expansion card
After installing the expansion card, configure it by adjusting the software settings.
1. Turn on the system and change the necessary BIOS settings, if any. See
Chapter 2 for information on BIOS setup.
2. Assign an IRQ to the card. Refer to the tables on the next page.
3. Install the software drivers for the expansion card.
