Asus P5L 1394 manual Interrupt assignments, Standard interrupt assignments

2.5.3 Interrupt assignments

Standard interrupt assignments

IRQ	Priority	Standard Function
0	1	System Timer
1	2	Keyboard Controller
2	—	Re-direct to IRQ#9
3	11	—
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	—	—	—	—	—	—
PCI slot 2	—	—	—	—	—	shared	—	—
PCI slot 3	—	—	—	—	—	—	shared	—
PCI E x16 slot	shared	—	—	—	—	—	—	—
PCI E x1 slot 1	shared	—	—	—	—	—	—	—
PCI E x1 slot 2	—	shared	—	—	—	—	—	—
Onboard USB controller 0	shared	—	—	—	—	—	—	—
Onboard USB controller 1	—	shared	—	—	—	—	—	—
Onboard USB controller 2	—	—	shared	— — — — —
Onboard USB controller 3	—	—	—	shared	—	—	—	—
Onboard EHCI controller	shared	—	—	—	—	—	—	—
Onboard IDE port	—	—	—	—	—	—	shared	—
Onboard SATA port	—	—	—	—	—	—	—	shared
Onboard Audio controller	—	—	—	shared	—	—	—	—
Onboard LAN controller	—	—	shared	—	—	—	—	—
Onboard 1394 controller	—	—	—	—	—	—	—	shared
Onboard SATA controller	—	—	—	shared	—	—	—	—

2-18 Chapter 2: Hardware information