Interrupt Assignments - Asus I220GC User Manual

1.8.3

Interrupt assignments

Standard interrupt assignments
IRQ
0
1
2
4
5
6
7
8
9
10
11
12
13
14
* These IRQs are usually available for ISA or PCI devices.
IRQ assignments for this motherboard
PCI slot 1
PCI slot 2
PCI Express x16 slot
PCI Express x1 slot
Onboard USB controller 1
Onboard USB controller 2
Onboard USB controller 3
Onboard USB controller 4
Onboard USB 2.0 controller
Onboard IDE port
Onboard HD audio
Onboard LAN
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.
1-14
Standard Function
System Timer
Keyboard Controller
Re-direct to IRQ#9
Communications Port (COM1)*
IRQ holder for PCI steering*
Floppy Disk Controller
Printer Port (LPT1)*
System CMOS/Real Time Clock
IRQ holder for PCI steering*
IRQ holder for PCI steering*
IRQ holder for PCI steering*
PS/2 Compatible Mouse Port*
Numeric Data Processor
Primary IDE Channel
A
—
—
shared
shared
—
—
—
—
—
—
—
—
B C D
shared — —
— — —
— — —
— — —
— — —
shared — —
— shared —
— — shared
— — —
— — —
— — shared
shared — —
E F
— —
— non-shared
— —
— —
shared —
— —
— —
— —
shared —
— — shared —
— —
— —
Chapter 1: Product introduction
G H
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