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2.6.2 Configuring an expansion card
After physically 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 4 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.
Standard Interrupt Assignments
IRQ
0
1
2
3*
4*
5*
6
7*
8
9*
10*
11*
12*
13
14*
15*
*These IRQs are usually available for ISA or PCI devices.
IRQ assignments for this motherboard
PCI slot 1
PCI slot 2
PCI slot 3
Onboard USB controller HC0
Onboard USB controller HC1
AGP
Onboard audio
Onboard LAN
Onboard VGA
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.
ASUS P4S333-VM motherboard user guide
Priority
1
2
N/A
11
12
13
14
15
3
4
5
6
7
8
9
10
A
—
—
—
—
—
shared
—
—
shared
Standard Function
System Timer
Keyboard Controller
Programmable Interrupt
Communications Port (COM2)
Communications Port (COM1)
Sound Card (sometimes LPT2)
Floppy Disk Controller
Printer Port (LPT1)
System CMOS/Real Time Clock
ACPI Mode when used
IRQ Holder for PCI Steering
IRQ Holder for PCI Steering
PS/2 Compatible Mouse Port
Numeric Data Processor
Primary IDE Channel
Secondary IDE Channel
B
C
shared
—
—
shared
—
—
—
—
—
—
—
—
—
shared
—
shared
—
—
D
—
—
shared
shared
shared
—
—
—
—
2-15
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