MSI B85M User Guide - Page 39

Jumper, JCOM1: Serial Port Connector, JBAT1: Clear CMOS Jumper

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Chapter 1 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. 2.S4I.ND6T.DR8S1.C0RT.NSo Pin 1.D3.CS5DO.G7Ur.RTo9uT.RnSdI 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. 1-25 Getting Started

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Chapter 1
1-25
Getting Started
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.
1.DCD
3.SOUT
10.No Pin
5.Ground
7.RTS
9.RI
8.CTS
6.DSR
4.DTR
2.SIN
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.
Keep Data
Clear Data
1
1
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.