Asus V3-P5P43 - Manual (Page 36)

2-18 Chapter 2: Basic installation
Interrupt.assignments
IRQ Standard.Function
0 System Timer
1 Standard 101/102-Key or Microsoft Natural Keyboard
2 Free
3 Free
4 Communications Port (COM1)
5 Free
6 Standard floppy
7 Free
8 System CMOS/real time clock
9 Microsoft acpi-Compliant system
10 Free
11 Free
12 Free
13 Numeric data processor
14 Free
15 Intel ® ICH10Family SMBus Controller-3A30