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ASUS P4S800-MX SE motherboard
1-13
Standard interrupt assignments
IRQ Priority Standard Function
0 1 System Timer
1 2 Keyboard Controller
2 N/A Programmable Interrupt
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 Advance AC’97 CODEC
11*6 Standard PCI Graphics Adapter (VGA)
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.
When using PCI cards 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.
IRQ assignments for this motherboard
ABCDEFGH
PCI slot 1 –– –– shared –– –– –– –– ––
PCI slot 2 –– –– –– shared –– –– –– ––
PCI slot 3 –– used –– –– –– –– –– ––
AGP slot shared –– –– –– –– –– –– ––
Onboard USB controller 1 –– –– –– –– used –– –– ––
Onboard USB controller 2 –– –– –– –– –– used –– ––
Onboard USB controller 3 –– –– –– –– –– –– used ––
Onboard USB 2.0 controller –– –– –– –– –– –– –– used
Onboard LAN –– –– –– shared –– –– –– ––
Onboard Audio –– –– shared –– –– –– –– ––
Onboard VGA shared –– –– –– –– –– –– ––
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.