2 System Board

Devices on the PCI Bus

Devices on the PCI Bus

PCI Device

Device

Device

Function

 

AD[xx]

Chip-set Interrupt Connection

 

 

 

 

 

Name

Number

 

INTA

INTB

INTC

INTD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PL/PCI bridge

440LX PAC

0

N/A

11

—

—

—

—

 

 

 

 

 

 

 

 

 

Virtual PCI-to-PCI bridge (AGP)

440LX PAC

1

N/A

12

—

—

—

—

 

 

 

 

 

 

 

 

 

PCI/ISA bridge

PIIX4

4

0

15

—

—

—

—

 

 

 

 

 

 

 

 

 

 

IDE controller

 

 

1

 

 

—

—

—

—

 

 

 

 

 

 

 

 

 

 

USB Host controller

 

 

2

 

 

—

—

—

—

 

 

 

 

 

 

 

 

 

 

Power Management and SM Bus

 

 

3

 

 

—

—

—

—

 

 

 

 

 

 

 

 

 

PCI slot #1 (LAN) - Minitower

16

7

0-7

18

A

B

C

D

Backplane Rear Board - Desktop

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PCI slot #2 - Minitower

17

10

0-7

21

D

A

B

C

PCI slot #1 - Desktop

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PCI slot #3 - Minitower

18

6

0-7

17

C

D

A

B

PCI slot #2 - Desktop

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PCI slot #4 - Minitower

19

12

0-7

23

B

C

D

A

PCI slot #3 - Desktop

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The distribution of the interrupt lines is described more fully on page 83.

Integrated Drive Electronics (IDE)

The IDE controller is implemented as part of the PIIX4 chip (the PCI/ISA bridge). It is driven from the PCI bus, and has PCI-Master capability. It supports Enhanced IDE (EIDE) and Standard IDE. To use the Enhanced IDE features the drives must be compliant with Enhanced IDE.

The IDE controller supports two devices (one master and one slave) connected to a single channel. The channel is fitted with an IDE cable with two connectors.

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