Asus P4P800 SE Interrupt assignments, IRQ assignments for this motherboard

2.5.3		Interrupt assignments
	Standard Interrupt Assignments
	IRQ	Priority	Standard Function
	0	1	System Timer
	1	2	Keyboard Controller
	2	N/A	Programmable Interrupt
	3*	11	Communications Port (COM2)
	4*	12	Communications Port (COM1)
	5*	13	Sound Card (sometimes LPT2)
	6	14	Floppy Disk Controller
	7*	15	Printer Port (LPT1)
	8	3	System CMOS/Real Time Clock
	9*	4	ACPI Mode when used
	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	ó	ó	ó	ó	ó	shared	ó	ó
PCI slot 2	ó	ó	ó	ó	ó	ó	shared	ó
PCI slot 3	ó	ó	ó	ó	ó	ó	ó	shared
PCI slot 4	ó	ó	ó	ó	shared	ó	ó	ó
PCI slot 5	ó	ó	ó	ó	ó	shared	ó	ó
AGP slot	used	ó	ó	ó	ó	ó	ó	ó
Onboard USB 1.1/2.0 controller ó		ó	ó	ó	shared shared shared shared
Onboard LAN	ó	ó	ó	ó	ó	ó	shared	ó
Onboard Audio	ó	ó	used	ó	ó	ó	ó	ó

When using PCI cards on shared slots, ensure that the drivers support ìShare IRQî 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.

ASUS P4P800 SE motherboard 2-17