Standard Interrupt Assignments; Irq Assignments For This Motherboard - Asus P4B266 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
PCI slot 6
Onboard USB controller HC0
Onboard USB controller HC1
Onboard USB 2.0 controller
AGP
CNR LAN
CNR Audio/Modem
Onboard Audio
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.
2-14
Priority
1
2
N/A
11
12
13
14
15
3
4
5
6
7
8
9
10
A B
— —
— —
— —
— —
— —
— —
— —
— —
— —
used —
— —
— 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
— — —
— — —
— — —
— — shared
— — —
used — —
used — —
— used —
— — —
— — —
— — shared
— — —
— — —
Chapter 2: Hardware information
F G H
shared — —
— used —
— — shared
— — —
shared — —
— — —
— — —
— — —
shared — —
— — —
— — —
— — —
shared — —