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2.5.3
Interrupt assignments
Standard interrupt assignments
IRQ
Priority
0
1
1
2
2
–
4
12
5
13
6
14
7
15
8
3
9
4
10
5
11
6
12
7
13
8
14
9
* These IRQs are usually available for ISA or PCI devices.
IRQ assignments for this motherboard
PCI Slot 1
PCI Slot 2
PCIe x16 slot 1
shared
PCIe x16 slot 2
PCIe x1 slot 1
PCIe x1 slot 2
2.5.4
PCI slots
The PCI slots support cards such as a LAN card, SCSI card, USB card, and
other cards that comply with PCI specifications. Refer to the figure below
for the location of the slots.
ASUS M2N4-SLI
Standard function
System Timer
Keyboard Controller
Redirect to IRQ#9
Communications Port (COM1)*
IRQ Holder for PCI Steering*
Floppy Disk Controller
Printer Port (LPT1)*
System CMOS/Real Time Clock
IRQ Holder for PCI Steering*
IRQ Holder for PCI Steering*
IRQ Holder for PCI Steering*
PS/2 Compatible Mouse Port*
Numeric Data Processor
Primary IDE Channel
A
B
C
shared
shared
D
E
F
shared
shared
G
H
shared
2-17
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