3 interrupt assignments, 4 pci slots, Standard interrupt assignments – Asus M2N4-SLI User Manual
Page 37: Irq assignments for this motherboard
ASUS M2N4-SLI
2-17
2.5.3 Interrupt assignments
Standard interrupt assignments
* These IRQs are usually available for ISA or PCI devices.
IRQ
Priority Standard function
0
1
System Timer
1
2
Keyboard Controller
2
–
Redirect to IRQ#9
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
IRQ Holder for PCI Steering*
11
6
IRQ Holder for PCI Steering*
12
7
PS/2 Compatible Mouse Port*
13
8
Numeric Data Processor
14
9
Primary IDE Channel
A
B
C
D
E
F
G
H
PCI Slot 1
shared
PCI Slot 2
shared
PCIe x16 slot 1
shared
PCIe x16 slot 2
shared
PCIe x1 slot 1
shared
PCIe x1 slot 2
shared
IRQ assignments for this motherboard
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.