2-22
MS-7390 Mainboard
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:
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 expan-
sion card, such as jumpers, switches or BIOS configuration.
Order 1 Order 2 Order 3 Order 4
PCI Slot 1 INT W# INT X# INT Y# INT Z#
PCI Slot 2 INT X# INT Y# INT Z# INT W#
32-bit PCI Slot
PCI (Peripheral Component Interconnect) Slots
The PCI slots support LAN cards, SCSI cards, USB cards, and other add-on cards
that comply with PCI specifications. At 32 bits and 33 MHz, it yields a throughput rate
of 133 MBps.
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