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ASUS P4V533-MX motherboard user guide
1-13
1.10 Expansion slots
The motherboard has three PCI slots and one Accelerated Graphics Port (AGP) slot.
To install and configure an expansion card:
1. Install an expansion card following the instructions that came with the chassis.
2. Turn on the system and change the necessary BIOS settings, if any. See
Chapter 2 for BIOS information.
3. Assign an IRQ to the card. Refer to the tables below.
4. Install the drivers and/or software applications for the expansion card
according to the card documentation.
1.10.1 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.
1.10.2 IRQ assignments for this motherboard
ABCDEFGH
PCI slot 1 — used — — — — — —
PCI slot 2 — — used — — — — —
PCI slot 3 — — — used — — — —
AGP slot used — — — — — — —
Onboard USB controller HC0 — — — — shared — — —
Onboard USB controller HC1 — — — — shared — — —
Onboard USB controller HC3 — — — — shared — — —
EHCI — — — — shared — — —
Onboard LAN — — — — — used — —
Onboard audio — — — — — — used —