Pci Interrupt Request Routing - MSI E7210 Master-FARM User Manual

MS-9149 ATX Server Board

PCI Interrupt Request Routing

The IRQ, abbreviation of interrupt request line and pronounced I-R-Q,
are h ard ware lines over which d evices can s end in terru pt sig nals t o t he
microprocessor. The PCI IRQ pins are typically connected to the PCI bus INT
A# ~ INT D# pins as follows:
PCI-32 IRQ Routing (for ICH-HR)
PCI Device INT A INT B
PCI32 Slot1 PIRQ#A PIRQ#B
PCI32 Slot2 PIRQ#B PIRQ#C
PCI32 Slot3 PIRQ#C PIRQ#D
VGA PIRQ#G
82541 GI LAN PIRQ#H
PDC20378 PIRQ#E
Primary IDE Interrupt: IRQ14 (for ICH-HR)
Secondary IDE Interrupt: IRQ15 (for ICH-HR)
PCIX-64 IRQ Routing (for ICH-HR)
PCI Device INT A INT B
PCIX-64 Slot1 PX_IRQ#0 PX_IRQ#1
PCIX-64 Slot2 PX_IRQ#1 PX_IRQ#2
CSA Interface IRQ routing (for Canterwood-ES)
PCI Device INT A INT B
82547 GI LAN PIRQ#F
2-20
INT C INT D
PIRQ#C PIRQ#D
PIRQ#D PIRQ#A
PIRQ#A PIRQ#B
INT C INT D
PX_IRQ#2 PX_IRQ#3
PX_IRQ#3 PX_IRQ#0
INT C INT D