Pci Interrupt Request Routing - MSI MS-9125 User Manual

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 INT
A# ~ INT D# pins as follows:
PCI-32 IRQ Routing (for ICH3)
PCI Device INT A
Mini PCI PIRQ#A
VGA PIRQ#D
IPMI PIRQ#A
P64H2 PIRQ#B
IDE RAID PIRQ#C
Primary IDE Interrupt: IRQ14 (for ICH3)
PCI-64 IRQ Routing
PCI Device INT A
PCIX Slot1 PAIRQ#2
SCSI PAIRQ#0
PCIX Slot3 PBIRQ#7
G-LAN PBIRQ#0
Hardware Setup
INT B INT C
PIRQ#B PIRQ#C
INT B INT C
PAIRQ#3 PAIRQ#0
PAIRQ#1
PBIRQ#8 PBIRQ#9
PBIRQ#1
INT D
PIRQ#D
INT D
PAIRQ#1
PBIRQ#6
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