Pci Interrupt Request Routing - MSI PM-104 Series User Manual

MS-92B9 Server

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
PCI Slot 1
PCI Slot 2
ITE IT8213F
LAN 82551QM
2-14
ICH INT Pin IDSEL
INT# A/B/C/D AD20
INT# B/C/D/A AD21
INT# C AD22
INT# D AD23
REQ / GNT
REQ#0/ GNT#0
REQ#1/ GNT#1
REQ#2/ GNT#2
REQ#3/ GNT#3