Pci Interrupt Request Routing - MSI P4M900M2 Series User Manual

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PCI Interrupt Request Routing

The IRQ, acronym 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 pins as follows:
PCI Slot 1
PCI Slot 2
2-20
Order 1 Order 2
INT B# INT C#
INT C# INT D#
Order 3 Order 4
INT D# INT A#
INT A# INT B#