Front Panel Connectors: Jfp1; Pci (Peripheral Component Interconnect) Express Slot; Pci Interrupt Request Routing - MSI P4M900M3-L Manual

Front Panel Connectors: JFP1,

JFP2
These connectors are for electrical connection to the
front panel switches and LEDs. The JFP1 is compliant
®
with Intel Front Panel I/O Connectivity Design Guide.
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 slot supports up to 4.0 GB/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:
JFP2
JFP1
8
8
7
Speaker
2 1
Power Power
LED Switch
2
1
HDD Reset
LED Switch
1 2 3 1 2 3
Keep Data
Power
LED
10
9
1 2 3
Clear Data