BIOS Overview

 

DMA controller

 

 

Channel

Function

 

 

0

Free

1

Free if not used for parallel port in Setup

2

Floppy disk controller

3

Free if not used for parallel port in Setup

4

Used to cascade DMA channels 0-3

5

Free

6

Free

7

Free

 

 

Interrupt Controllers

The Interrupt Requests (IRQs) are numbered sequentially, starting with the master controller, and followed by the slave.

 

Windows 2000 and Windows XP

 

 

IRQ

Interrupt Request Description

(Interrupt Vector)

 

 

 

INTR

 

 

 

ISA0

System Timer

 

 

ISA1

Standard 101/102-Key or Microsoft Natural PS/2 keyboard

 

 

ISA3

Communication Port (COM2)

 

 

ISA4

Communication Port (COM1)

 

 

ISA6

Standard Floppy Disk Controller

 

 

ISA8

System CMOS/real time clock

 

 

ISA9

Microsoft ACPI-Compliant System

 

 

ISA12

PS/2 Compatible Mouse

 

 

ISA13

Numeric data processor

 

 

ISA14

Primary IDE Channel

 

 

ISA15

Secondary IDE Channel

 

 

PCI5

Intel(R) 82801BA/BAM SMBus Controller - 2443

 

 

PCI17

Intel(R) 82801BA/BAM AC’97 Audio Controller - 2445

 

 

PCI19

Intel(R) 82801BA/BAM USB Universal Host Controller - 2442

 

 

PCI20

Intel(R) PRO/100 VE Network Connection

 

 

PCI 23

Intel(R) 82801BA/BAM USB Universal Host Controller - 2444

 

 

46 Evo D310 Micro Desktop

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Compaq D310 manual Interrupt Controllers, Bios Overview DMA controller, Windows 2000 and Windows XP