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2.5.3
Interrupt assignments
Standard interrupt assignments
IRQ
Priority
0
1
2
4
12
5
13
6
14
7
15
8
9
10
11
12
13
14
15
10
* These IRQs are usually available for ISA or PCI devices.
2.5.4
PCI Express x16 slot
This motherboard supports PCI
Express x16 graphic cards that
comply with the PCI Express
specifications. The figure shows a
graphics card installed on the PCI
Express x16 slot.
ASUS KFN4-DRE
Standard Function
1
System Timer
2
Keyboard Controller
–
Programmable interrupt
Communications Port (COM1)*
IRQ holder for PCI steering*
Floppy Disk Controller
Printer Port (LPT1)*
3
System CMOS/Real Time Clock
4
IRQ holder for PCI steering*
5
IRQ holder for PCI steering*
6
IRQ holder for PCI steering*
7
PS/2 Compatible Mouse Port*
8
Numeric Data Processor
9
Primary IDE Channel
Secondary IDE Channel
2-15
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