Pci Interrupt Request Routing - MSI MS-6380 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. To install a PCI expansion card on a PCI shared slot, you
must make sure the card's driver supports "IRQ shared" function or there is
no need to assign an IRQ to the device.
The "AGP/PCI" IRQ pins are typically connected to the PCI bus INTA#-
INTD# pins as follows:
AGP
PCI Slot 1 INT A# INT B# INT C# INT D#
PCI Slot 2 INT B# INT C# INT D# INT A#
PCI Slot 3 INT C# INT D# INT A# INT B#
PCI Slot 4 INT D# INT A# INT B# INT C#
PCI Slot 5 INT A# INT B# INT C# INT D#
The mainboard supports PCI Slot 1~5 Bus Master.
Order 1 Order 2 Order 3 Order 4
INT A# INT B#
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