Pci Interrupt Request Routing - MSI MS-6567 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/USB/ACHIP" 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
PCI Slot 4
PCI Slot 5
NEC USB 2.0
LAN Controller
ACHIP ATA 133
AGP & PCI Slot 4 & NEC USB2.0 shared.
PCI Slot 1 & PCI Slot 5 shared.
PCI Slot 2 & LAN shared.
PCI Slot 3 & ACHIP ATA133 shared.
PCI Slot 1~5: Bus Master
Order 1 Order 2 Order 3 Order 4
INT A# INT B# INT C#
INT B# INT C# INT D#
INT C# INT D# INT A#
INT D# INT A# INT B#
INT A# INT B# INT C#
INT B# INT C# INT D#
INT A# INT B# INT C#
INT C# INT D# INT A#
INT D# INT A# INT B#
2-24
INT D#
INT A#
INT B#
INT C#
INT D#
INT A#
INT D#
INT B#
INT C#