Pci (Peripheral Component Interconnect) Slots; Pci Interrupt Request Routing - MSI MS-7151 Operation User's Manual

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MS-7151 ATX Mainboard

PCI (Peripheral Component Interconnect) Slots

The PCI slots allow you to insert the expansion cards to meet your needs.
W hen adding or removing expansion cards, make sure that you unplug the power
supply first. Meanwhile, read the documentation for the expansion card to make 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 hard-
ware lines over which devices can send interrupt signals to the microprocessor. The
PCI IRQ pins are typically connected to the PCI bus INT A# ~ INT D# pins as follows:
PCI Slot 1
PCI Slot 2
PCI Slot 3
PCI Slot 4
2-22
Order 1 Order 2
INT A# INT B#
INT B# INT C#
INT C# INT D#
INT D# INT A#
PCI Slots
Order 3 Order 4
INT C# INT D#
INT D# INT A#
INT A# INT B#
INT B# INT C#