MSI P55-CD45 series - Page 39

Hardware Setup ▍
MS-7586
2-23
Hardware Setup ▍
MS-7586
PCI (Perpheral Component Interconnect) Slot
The PCI slot supports LAN card, SCSI card, USB card, and other add-on cards that
comply wth PCI spec󰘰catons.
32-bt PCI Slot
Important
When addng or removng expanson cards, make sure that you unplug the power sup-
ply 󰘰rst. Meanwhle, read the documentaton for the expanson card to con󰘰gure any
necessary hardware or software settngs for the expanson card, such as jumpers,
swtches or BIOS con󰘰guraton.
PCI Interrupt Request Routng
The IRQ, acronym of nterrupt request lne and pronounced I-R-Q, are hardware lnes
over whch devces can send nterrupt sgnals to the mcroprocessor. The PCI IRQ pns
are typcally connected to the PCI bus pns as follows:
Order1 Order2 Order3 Order4
PCI Slot1 INT E# INT F# INT G# INT H#
PCI Slot2 INT F# INT G# INT H# INT E#
PCI Slot3 INT G# INT H# INT E# INT F#