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PCI (Peripheral Component Interconnect) Slot
The PCI slot supports LAN card, SCSI card, USB card, and other add-on cards that
comply with PCI specifications.
Important
When adding or removing expansion cards, make sure that you unplug the
power supply first. Meanwhile, read the documentation for the expansion card
to configure any necessary hardware or software settings for the expansion
card, such as jumpers, switches or BIOS configuration.
PCI Interrupt Request Routing
The IRQ, acronym of interrupt request line and pronounced I-R-Q, are hardware lines
over which devices can send interrupt signals to the microprocessor. The PCI IRQ
pins are typically connected to the PCI bus pins as follows:
nne
nn
PCI Slot 1
PCI Slot 2
R
R
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ou
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Order 1
Order 2
INT A#
INT B#
INT B#
INT C#
Hardware Setup
32-bit PCI Slot
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Order 3
INT C#
INT D#
Order 4
INT D#
INT A#
2-25
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