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ASUS P5N7A-VM 1-25
1.8.3 Interrupt assignments
IRQ Priority Standard function
0 1 System timer
1 2 Keyboard controller
2
– Re-direct to IRQ#9
3 11 IRQ holder for PCI steering*
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 IRQ holder for PCI steering*
13 8 Numeric data processor
14 9 Primary IDE channel
15 10 Secondary IDE channel
* These IRQs are usually available for PCI devices.
PIRQ1 PIRQ2 PIRQ3 PIRQ4 PIRQ5 PIRQ6
PCI slot 1 shared shared shared shared — —
PCI slot 2 shared shared shared shared — —
PCI Express x16 slot — — — — shared —
PCI Express x1 slot — — — — — shared
IRQ assignments for this motherboard
MCP
_USB
MCP
_MAC
MCP
_AZA
MCP
_IGPU
MCP
_IDE
MCP
_USB2
MCP
_AHCI
Onboard USB controller shared — — — — — —
Onboard USB 2.0 controller — — — — — shared —
Onboard USB controller 1 shared — — — — —
Onboard USB 2.0 controller 1 — — — — — shared —
Onboard LAN — shared — — — — —
Onboard SATA controller — — — — — — shared
Onboard HD Audido — — shared — — — —
Onboard VGA — — — shared — — —
Internal devices interrupt
External devices interrupt