Pci (Peripheral Component Interconnect) Slots; Cnr (Communication Network Riser) Slot; Pci Interrupt Request Routing - MSI 845GVM2-V Series Instruction Manual

information.

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.

CNR (Communication Network Riser) Slot

The CNR slot allows you to insert the CNR expansion cards. CNR is a specially designed
network, audio, or modem riser card for ATX family motherboards. Its main processing is done
through software and controlled by the motherboard chipset.

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 B#
PCI Slot 2 INT C#
Order2 Order3
INT C# INT D#
INT D# INT A#
Order4
INT A#
INT B#
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