0=H@M=HA5AJKF
2-31
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/AC97/IDE RAID IRQ pins are typically
connectoed to the PCI bus INTA#-INTD# pins as follows.
Order 1 Order 2 Order 3 Order 4
AGP
INT A# INT B#
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 D# INT A# INT B# INT C#
PCI Slot 4 INT D# INT A# INT B# INT C#
PCI Slot 5 INT A# INT B# INT C# INT D#
USB1-2 INT D#
USB3-4 INT D#
USB5-6 INT D#
AC97
INT C#
IDE RAID INT C#
AGP & PCI Slot 1 shared.
PCI Slot 3 & PCI Slot 4 shared.
AC97 codec & Promise IDE Raid shared.
PCI Slot 1~5: Bus Master