Pci (Peripheral Component Interconnect) Slots; Pci Interrupt Request Routing - MSI MS-7139 Instruction Manual

PCI (Peripheral Component Interconnect) Slots

The PCI slots allow you to insert the expansion cards
to meet your needs. When 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, abbreviation 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 INT A# ~ INT D# pins as follows:
Order1
PCI Slot 1 INT A#
PCI Slot 2 INT B#
PCI Slot 3 INT C#
Order2 Order3
INT B# INT C#
INT C# INT D#
INT D# INT A#
Order4
INT D#
INT A#
INT B#
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