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1-141-14
1-141-14
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Chapter 1: Product introductionChapter 1: Product introduction
Chapter 1: Product introductionChapter 1: Product introduction
Chapter 1: Product introduction
1.8.31.8.3
1.8.31.8.3
1.8.3
Interrupt assignmentsInterrupt assignments
Interrupt assignmentsInterrupt assignments
Interrupt assignments
Standard interrupt assignmentsStandard interrupt assignments
Standard interrupt assignmentsStandard interrupt assignments
Standard interrupt assignments
IRQIRQ
IRQIRQ
IRQ
Standard FunctionStandard Function
Standard FunctionStandard Function
Standard Function
0 System Timer
1 Keyboard Controller
2 Programmable Interrupt
4* Communications Port (COM1)
5* Sound Card (sometimes LPT2)
6 Floppy Disk Controller
7* Printer Port (LPT1)
8 System CMOS/Real Time Clock
9* ACPI Mode when used
10* IRQ holder for PCI Steering
12* PS/2 Compatible Mouse Port
13 Numeric Data Processor
14* Primary IDE Channel
15* Secondary IDE Channel
* These IRQs are usually available for ISA or PCI devices.
IRQ assignments for this motherboardIRQ assignments for this motherboard
IRQ assignments for this motherboardIRQ assignments for this motherboard
IRQ assignments for this motherboard
AA
AA
A
BB
BB
B
CC
CC
C
DD
DD
D
AGP slot used — — —
PCI slot 1 — used — —
PCI slot 2 — — used —
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.