Asus M3N78-EH - Manual (Page 31)

ASUS M3N78-EH 1-19
* These IRQs are usually available for ISA or PCI devices.
interrupt assignments
IRQ Standard function
1 Standard 101/102-Key or Microsoft natural PS/2 keyboard
2 High precision event timer
4 Communications Port (COM 1)*
6 Standard floppy disk controller
8 High precision event timer
9 Microsoft ACPI-compliant system
12 PS/2 compatible mouse
13 Numeric data processor
11 NVIDIA nForce PCI system management
17 NVIDIA GeForce 6800 series GPU
17 PCI standard PCI to PCI bridge
18 PCI standard PCI to PCI bridge
19 PCI standard PCI to PCI bridge
20 NVIDIA network bus enumerator
20 Standard enhanced PCI to USB host controller
20 Standard bisync IDE channel
21 Standard enhanced PCI to USB host controller
22 Microsoft UAA bus driver for high definition audio
22 NVIDIA nForce system management controller
23 Standard OpenHCD USB host controller
23 Standard OpenHCD USB host controller
LNKA LNKB LNKC LN0A LNT2A LNT3A
PCI Slot 1 shared – – – – –
PCI Slot 2 – shared – – – –
PCI Slot 3 – – shared – – –
PCIEX16 Slot – – – shared – –
PCIEx1 Slot 1 – – – – shared –
PCIEx1 Slot 2 – – – – – 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.
IRQ assignments for this motherboard