Hardware Setup
2-19
PCI Interrupt Request Routing
The IRQ (Interrupt ReQuest) is the mechanism for devices to request ser-
vices from the microprocessor. The “PCI & LAN” IRQ pins are typically
connected to the PCI bus INT A# ~ INT D# pins as follows:
Order 1
Order 2
Order 3
Order 4
PCI Slot 1
INT B#
INT C#
INT D#
INT A#
LAN
INT B#
PCI Interrupt Request Routing