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