2 System Board

Assigned Device Interrupts

Assigned Device Interrupts

Input/Output Controller Hub Interrupts

Device

Reference

REQ/

ID

IDSEL

 

Chip-set Interrupt Connection

 

 

 

 

 

 

 

Name

GNT

AD[xx]

INTA

 

INTB

INTC

 

INTD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AC’97 Audio Controller

CS4280

4 (ICH)

5

21

—

 

A

—

 

—

 

 

 

 

 

 

 

 

 

 

 

USB Controller

—

—

—

—

A

 

—

—

 

—

 

 

 

 

 

 

 

 

 

 

 

AGP slot

J34

—

0

16

A

 

B

—

 

—

 

 

 

 

 

 

 

 

 

 

 

PCI 32-bit slot #1

J37

1 (ICH)

6

22

C

 

D

A

 

B

 

 

 

 

 

 

 

 

 

 

 

PCI 32-bit slot #2

J38

0 (ICH)

8

24

A

 

B

C

 

D

 

 

 

 

 

 

 

 

 

 

 

PCI 32-bit slot #5 (LAN card)

J42

5 (ICH)

11

27

B

 

C

D

 

A

 

 

 

 

 

 

 

 

 

 

 

PCI 64-bit Hub Interrupts

Device

Reference

REQ/

ID

IDSEL

 

 

Interrupt Requests (IRQ)

 

 

 

 

 

 

 

 

 

 

 

Name

GNT

AD[xx]

0

1

2

3

4

5

6

7

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ultra-wide SCSI U160 Controller

AIC-7892

2 (P64H)

9

25

—

—

—

—

—

—

—

—

A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PCI 64-bit slot #3

J39

1 (P64H)

4

20

—

—

—

—

A

B

C

D

—

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PCI 64-bit slot #4

J40

0 (P64H)

7

23

A

B

C

D

—

—

—

—

—

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Interrupt Controllers

The system has an Interrupt controller which is equivalent in function to that of two 82C59 interrupt controllers. The following table shows how the interrupts are connected to the APIC controller. The Interrupt Requests (IRQ) are numbered sequentially, starting with the master controller, and followed by the slave (both of 82C59 type).

68