Pci Interrupt Request Routing - MSI K9NGM4 Series User Manual

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:
PCI Slot 1
PCI Slot 2
Order 1
INT Y#
INT X#
Order 2
INT Z#
INT Y#
9
Order 3
INT W#
INT Z#
Order 4
INT X#
INT W#