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Pci interrupt request routing – MSI PM-104 User Manual

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MS-92B9 Server

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PCI Interrupt Request Routing

The IRQ, acronym of interrupt request line and pronounced I-R-Q, are hardware lines

over which devices can send interrupt signals to the microprocessor. The PCI IRQ

pins are typically connected to the PCI bus pins as follows:

DEVICE

ICH INT Pin

IDSEL

REQ / GNT

PCI Slot 1

INT# A/B/C/D

AD20

REQ#0/ GNT#0

PCI Slot 2

INT# B/C/D/A

AD21

REQ#1/ GNT#1

ITE IT8213F

INT# C

AD22

REQ#2/ GNT#2

LAN 82551QM

INT# D

AD23

REQ#3/ GNT#3

92B9v1.0-2.p65

2008/9/8, 上午 10:02

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