MSI E7500 User Manual - Page 39
PCI Interrupt Request Routing
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Hardware Setup PCI Interrupt Request Routing The IRQ, abbreviation 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: 32-bit PCI IRQ Routing (for ICH3) PCI DEVICE 32-bit PCI Slot LAN (82550) VGA P64H2 INT A# INT B# INT C# INT D# PIRQ#A PIRQ#B PIRQ#C PIRQ#D PIRQ#C PIRQ#D PIRQ#B 64-bit PCI IRQ Routing PCI DEVICE INT A# INT B# INT C# INT D# 64-bit PCI Slot4 PAIRQ#4 PAIRQ#5 PAIRQ#6 PAIRQ#7 64-bit PCI Slot5 (ZCR) PAIRQ#8 PAIRQ#9 PAIRQ#10 PAIRQ#11 SCSI PAIRQ#0 PAIRQ#1 64-bit PCI Slot1 PBIRQ#11 PBIRQ#12 PBIRQ#9 PBIRQ#10 64-bit PCI Slot2 PBIRQ#1 PBIRQ#2 PBIRQ#3 PBIRQ#4 64-bit PCI Slot3 PBIRQ#6 PBIRQ#7 PBIRQ#8 PBIRQ#5 Giga-bit LAN PBIRQ#0 2-23
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