Specifications

System interrupt specifications

Hardware IRQ

System function

 

 

IRQ0

System timer

 

 

IRQ1

Standard 101-/102-Key or Microsoft® Natural Keyboard

 

 

IRQ2

Cascaded

 

 

IRQ4

COM1

 

 

IRQ6

Diskette drive

 

 

IRQ7*

Parallel port

 

 

IRQ8

System CMOS/real-time clock

 

 

IRQ9*

Microsoft ACPI-compliant system

 

 

IRQ12

Synaptics PS/2 TouchPad

 

 

IRQ13

Numeric data processor

 

 

IRQ14

Primary IDE channel

 

 

IRQ15

Secondary IDE channel

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

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.

System I/O address specifications

I/O address (hex)

System function (shipping configuration)

 

 

000 - 00F

DMA controller no. 1

 

 

 

010

- 01F

Unused

 

 

020 - 021

Interrupt controller no. 1

 

 

 

022

- 024

Opti chipset configuration registers

 

 

 

025

- 03F

Unused

 

 

02E - 02F

87334 “Super I/O” configuration for CPU

 

 

040 - 05F

Counter/timer registers

 

 

 

044

- 05F

Unused

 

 

 

060

 

Keyboard controller

 

 

 

061

 

Port B

 

 

062 - 063

Unused

 

 

 

064

 

Keyboard controller

 

 

 

065

- 06F

Unused

 

 

070 - 071

NMI enable/RTC

 

 

 

072

- 07F

Unused

 

 

080 - 08F

DMA page registers

 

 

090 - 091

Unused

(Continued)

6–6

Maintenance and Service Guide

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HP CQ61-113TU, CQ61-126TU System interrupt specifications, System I/O address specifications, Hardware IRQ System function

CQ61-222TX, CQ61-227TU, CQ61-223TX, CQ61-110TU, CQ61-227TX specifications

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