Specifications

 

Table 6-13

 

System Interrupts

Hardware

System

IRQ

Function

 

 

IRQ0

System timer

 

 

IRQ1

Keyboard controller

 

 

IRQ2

Cascaded

 

 

IRQ3

COM2

 

 

IRQ4

COM1

 

 

IRQ5

Audio (default)*

 

 

IRQ6

Diskette drive

 

 

IRQ7

Parallel port

 

 

IRQ8

RTC

 

 

IRQ9

Assigned by operating system

 

 

IRQ10

Assigned by operating system

 

 

IRQ11

Assigned by operating system

 

 

IRQ12

Internal point stick or external mouse

 

 

IRQ13

Infrared

 

 

IRQ14

Primary IDE interface

 

 

IRQ15

Secondary IDE interface

PC Cards may assert IRQ3, IRQ4, IRQ5, IRQ7, IRQ9, IRQ10, IRQ11, or IRQ15. Either the infrared or the serial port may assert IRQ3 or IRQ4.

*Default configuration; audio possible configurations are IRQ5, IRQ7, IRQ9, IRQ10, or none.

Maintenance and Service Guide

6–13

Page 155
Image 155
HP nw8000 manual System Interrupts, Irq