Pci Interrupt Request Routing - MSI MS-9105 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/Promise RAID/LAN" IRQ pins are typically connected
to the PCI bus INTA#-INTD# pins as follows:
AGP
PCI Slot 1
PCI Slot 2
PCI Slot 3
PCI Slot 4
PCI Slot 5
Promise RAID INT B#
LAN
AGP & PCI Slot 4 & LAN shared.
PCI Slot 1 & PCI Slot 5 shared.
PCI Slot 2 & PCI Slot 3 shared.
PCI Slot 1~5: Bus Master
Order 1 Order 2 Order 3 Order 4
INT A# INT B#
INT D# INT A# INT B# INT C#
INT C# INT D# INT A# INT B#
INT C# INT D# INT A# INT B#
INT A# INT B# INT C# INT D#
INT D# INT A# INT B# INT C#
INT A#
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