Computer Hardware User Manual
ASUS M2N-E 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
On board 1394 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 specications. Refer to the gure below
for the location of the slots.