Asus P4SE/U2 - Manual (Page 19)

ASUS P4SE Motherboard 1-9
1.8 Expansion slots
The P4SE motherboard has six (6) expansion slots. The following sub-
sections describe the slots and the expansion cards that they support.
1.8.1 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.
2. Assign an IRQ to the card. Refer to the tables below.
3. Install the software drivers for the expansion card.
IRQ assignments for this motherboard
A B C D
PCI slot 1 shared — — —
PCI slot 2 — shared — —
PCI slot 3 — — shared —
PCI slot 4 — — — shared
PCI slot 5 shared — — —
PCI slot 6 — shared — —
Onboard USB controller HC0 — — — shared
Onboard USB controller HC1 — — — shared
AGP shared — — —
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 two PCI groups.
1.8.2 Standard Interrupt Assignments
IRQ Priority Standard Function
0 1 System Timer
1 2 Keyboard Controller
2 N/A Programmable Interrupt Controller
3* 11 Communications Port (COM2)
4* 12 Communications Port (COM1)
5* 13 Sound Card (sometimes LPT2)
6 14 Standard Floppy Disk Controller
7* 15 Printer Port (LPT1)
8 3 System CMOS/Real Time Clock
9* 4 ACPI Mode when used
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.