Pci (perpheral component interconnect) slot, Important, Pci interrupt request routng – MSI P67A-C43 (B3) User Manual
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Hardware Setup
PCI (Perpheral Component Interconnect) Slot
The PCI slot supports LAN card, SCSI card, USB card, and other add-on cards that
comply wth PCI specficatons.
32-bt PCI Slot
Important
When addng or removng expanson cards, make sure that you unplug the power sup-
ply first. Meanwhle, read the documentaton for the expanson card to configure any
necessary hardware or software settngs for the expanson card, such as jumpers,
swtches or BIOS configuraton.
PCI Interrupt Request Routng
IRQ, or nterrupt request lne, are hardware lnes over whch devces can send nterrupt
sgnals to the mcroprocessor. The PCI IRQ pns are typcally connected to the PCI bus
pns as follows:
Order1 Order2 Order3 Order4
PCI Slot1
INT A# INT B# INT C# INT D#
PCI Slot2
INT B# INT C# INT D# INT A#
PCI Slot3
INT C# INT D# INT A# INT B#