Asus P1-AH1 - Manual (Page 33)

2-17 ASUS Pundit P1-AH1
2.8.3 Configuring an expansion card
After installing the expansion card, configure the card by adjusting the
software settings.
1. Turn on the system and change the necessary BIOS settings, if any.
See Chapter 5 for information on BIOS setup.
2. Assign an IRQ to the card. Refer to the tables below.
3. Install the software drivers for the expansion card.
When using a PCI card on shared slots, ensure that the drivers support
“Share IRQ” or that the cards do not need IRQ assignments;
otherwise, conflicts will arise between the two PCI groups, making the
system unstable and the card inoperable.
Standard interrupt assignments
IRQ Priority Standard Function
0 1 System Timer
1 2 Keyboard Controller
2 - Redirect to IRQ#9
3 11 IRQ Holder for PCI Steering*
4 12 Communications Port (COM1)*
5 13 IRQ Holder for PCI Steering*
6 14 Floppy Disk Controller
7 15 Printer Port (LPT1)*
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 PS/2 Compatible Mouse Port*
13 8 Numeric Data Processor
14 9 Primary IDE Channel
15 10 Secondary IDE Channel
* These IRQs are usually available for ISA or PCI devices.
IRQ assignments for the system motherboard
A B C D
PCI slot 1 used — — —
PCI slot 2 — used — —
IEEE 1394 — — — used