Serial Port Connector: Jcom2 (Optional); Clear Cmos Jumper: Jbat1; Pci (Peripheral Component Interconnect) Slots; Pci Interrupt Request Routing - MSI MS-7101 Instruction Manual

Serial Port Connector: JCOM2 (Optional)

The mainboard offers one 9-pin male DIN connector COM A (on the rear panel), and
one optional serial port JCOM2. Both are 16550A high speed communication ports
that send/receive/ 16 bytes FIFOs. You can attach a serial mouse or other serial
device directly to them.

Clear CMOS Jumper: JBAT1

There is a CMOS RAM on board that has a power supply
from 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, use the JBAT1
(Clear CMOS Jumper) to clear data. Follow the instructions in the image to clear the data.
MSI Reminds You...
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) 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 (optional)
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's 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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