Pci (Peripheral Component Interconnect) Express Slot; Pci Interrupt Request Routing - MSI 945GCM5 Instruction Manual

Clear CMOS Jumper: JBAT1
There is a CMOS RAM onboard that has a power supply
from an external battery to keep the data of system
configuration. With the CMOS RAM, the system can
automatically boot OS every time it is turned on. If you
want to clear the system configuration, set the jumper to
clear data.
Important:
You can clear CMOS by shorting 2-3 pin while the system is off. Then return to 1-2 pin
position. Avoid clearing the CMOS while the system is on; it will damage the mainboard.

PCI (Peripheral Component Interconnect) Express Slot

The PCI Express slot supports the PCI Express interface expansion card.
The PCI Express x 16 supports up to 4.0 GB/s transfer rate.
The PCI Express x 1 supports up to 250 MB/s transfer rate.
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 Slot1
PCI Slot2
Order1 Order2
INT B# INT C#
INT C# INT D#
1
2
3
Order3
INT D#
INT A#
8
1 1
2 2
3 3
Keep Data Clear Data
Order4
INT A#
INT B#