Asus A8N-SLI Standard interrupt assignments, IRQ assignments for this motherboard

Standard interrupt assignments

I R Q	Priority	Standard Function
0	1	System Timer
1	2	Keyboard Controller
2	Ð	Re-direct 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
15	10	Secondary IDE Channel

* These IRQs are usually available for ISA or PCI devices.

IRQ assignments for this motherboard

	A	B	C	D	E	F	G	H
PCI slot 1	shared	Ñ	Ñ	Ñ	Ñ	Ñ	Ñ	Ñ
PCI slot 2	Ñ	shared	Ñ	Ñ	Ñ	Ñ	Ñ	Ñ
PCI slot 3	Ñ	Ñ	shared	Ñ	Ñ	Ñ	Ñ	Ñ
Onboard USB 1.0 controller	shared	Ñ	Ñ	Ñ	Ñ	Ñ	Ñ	Ñ
Onboard USB 2.0 controller	shared	Ñ	Ñ	Ñ	Ñ	Ñ	Ñ	Ñ
Onboard LAN1	shared	Ñ	Ñ	Ñ	Ñ	Ñ	Ñ	Ñ
Onboard LAN2	Ñ	shared	Ñ	Ñ	Ñ	Ñ	Ñ	Ñ
Onboard PCI SATA RAID (SI)	Ñ	Ñ	Ñ	shared	Ñ	Ñ	Ñ	Ñ
Onboard 1394a	shared	Ñ	Ñ	Ñ	Ñ	Ñ	Ñ	Ñ

When using PCI cards on shared slots, ensure that the drivers support ÒShare IRQÓ or that the cards do not need IRQ assignments; otherwise, conflicts will arise between the two PCI groups, making the system unstable and the card inoperable.

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