Pci Interrupt Request Routing - VIA Technologies P4XB-MA User Manual

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 & LAN" IRQ pins are typically connected to the PCI
bus INT A# ~ INT D# pins as follows:
PCI Slot 1
PCI Slot 2
PCI Slot 3
LAN
Order 1 Order 2
INT A# INT B#
INT B# INT C#
INT C# INT D#
INT B#
2-23
Hardware Setup
Order 3 Order 4
INT C# INT D#
INT D# INT A#
INT A# INT B#