Asus A7N8X-XE manual Standard interrupt assignments, IRQ assignments for this motherboard

Standard interrupt assignments

IRQ Standard Function

0System Timer

1	Standard 101-102-key or microsoft natural keyboard
2	Programmable interrupt controller
3	ACPI IRQ hold for PCI IRQ steering
4	Communications Port (COM1)
5	C-Media AC 97 audio device
6	Standard floppy disk controller
7	ECP printer port
8	System CMOS/Real Time Clock
9	SCI IRQ used by ACPI bus
10	ACPI IRQ holder for PCI IRQ steering
11	ACPI IRQ holder for PCI IRQ steering
12	PS/2 Mouse and Keyboard
13	Numeric Data Processor
14	Primary IDE controller
15	Secondary IDE Channel

IRQ assignments for this motherboard

	A	B	C	D
PCI slot 1	—	—	shared	—
PCI slot 2	—	—	—	used
PCI slot 3	used	—	—	—
PCI slot 4	—	used	—	—
PCI slot 5	—	—	shared	—

When using PCI cards on shared slots, ensure that the drivers support “Share IRQ” 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 A7N8X-XE Motherboard 1-13