Jcom1: Serial Port Connector; Jumper - MSI B85M-E45 Handbuch

JCOM1: Serial Port Connector

This connector is a 16550A high speed communication port that sends/receives 16
bytes FIFOs. You can attach a serial device.

Jumper

JBAT1: Clear CMOS Jumper
There is CMOS RAM onboard that is external powered from a battery located on the
motherboard to save system configuration data. With the CMOS RAM, the system can
automatically boot into the operating system (OS) every time it is turned on. If you
want to clear the system configuration, set the jumpers to clear the CMOS RAM.
1 1
Keep Data Clear Data
Important
You can clear the CMOS RAM by shorting this jumper while the system is off.
Afterwards, open the jumper . Do not clear the CMOS RAM while the system is on
because it will damage the motherboard.
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