8 expansion slots, 1 standard interrupt assignments – Asus P4S800-X User Manual
Page 22
1-12
Chapter 1: Product introduction
1.8
Expansion slots
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 next page.
4. Install the drivers and/or software applications for the expansion card
according to the card documentation.
Table 2 Memory Frequency/CPU FSB Synchronization
1.8.1 Standard interrupt assignments
IRQ
Priority
Standard Function
0
1
System Timer
1
2
Keyboard Controller
2
N/A
Programmable Interrupt
3*
11
Communications Port (COM2)
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.
CPU Front Side Bus (FSB)
Memory Frequency
800 MHz
PC3200/PC2700
533 MHz
PC3200/PC2700/PC2100
400 MHz
PC3200/PC2700/PC2100/PC1600