Standard Interrupt Assignments; Irq Assignments For This Motherboard - Asus P4G8X User Manual

Standard Interrupt Assignments

IRQ
0
1
2
3*
4*
5*
6
7*
8
9*
10*
11*
12*
13
14*
15*
*
These IRQs are usually available for ISA or PCI devices.

IRQ assignments for this motherboard

PCI slot 1
PCI slot 2
PCI slot 3
PCI slot 4
PCI slot 5
AGP PRO slot
Onboard USB controller HC0 shared
Onboard USB controller HC1
Onboard USB controller HC2
Onboard USB 2.0 controller
Onboard LAN (optional)
Onboard SATA (optional)
Onboard 1394 (optional)
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 P4G8X series motherboard user guide
Priority
1
2
N/A
11
12
13
14
15
3
4
5
6
7
8
9
10
A B
— —
— —
— —
— —
— —
shared —
—
— —
— —
— —
— —
— —
— used
Standard Function
System Timer
Keyboard Controller
Programmable Interrupt
Communications Port (COM2)
Communications Port (COM1)
Sound Card (sometimes LPT2)
Floppy Disk Controller
Printer Port (LPT1)
System CMOS/Real Time Clock
ACPI Mode when used
IRQ Holder for PCI Steering
IRQ Holder for PCI Steering
PS/2 Compatible Mouse Port
Numeric Data Processor
Primary IDE Channel
Secondary IDE Channel
C D E
— — —
— — —
— — —
— — used
shared — —
— — —
— — —
— used —
shared — —
— — —
shared — —
— — —
— — —
F G H
shared — —
— used —
— — shared
— — —
— — —
— — —
— — —
— — —
— — —
— — shared
— — —
shared — —
— — —
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