Pci Interrupt Request Routing - MSI MS-6390 User Manual

Chapter 2

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 "AGP/PCI" IRQ pins are typically connected to the PCI
bus INT A# ~ INT D# pins as follows:
AGP
PCI Slot 1
PCI Slot 2
PCI Slot 3
AGP & PCI Slot 1 shared.
PCI Slot 1~3: Bus Master
Order 1 Order 2 Order 3 Order 4
INT A# INT B# INT C#
INT A# INT B# INT C#
INT B# INT C# INT D#
INT C# INT D# INT A#
2-26
INT D#
INT D#
INT A#
INT B#