MSI G52-72701X1 Manuel D'instructions page 15

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:
Order1
PCI Slot 1 INT B#
PCI Slot 2 INT C#
PCI Slot 3 INT D#
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Order2 Order3
INT C# INT D#
INT D# INT A#
INT E# INT B#
9
Order4
INT A#
INT B#
INT C#