Pci Interrupt Request Routing - MSI G52-72221X3 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 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
Order1 Order2
INT A# INT D#
INT B# INT C#
INT C# INT D#
10
Order3 Order4
INT C# INT B#
INT D# INT A#
INT A# INT B#