Biostar A75MH Setup Manual - Page 18

JCMOS1: Clear CMOS Header, Clear CMOS Procedures, J_COM1: Serial Port Connector

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Motherboard Manual JCMOS1: Clear CMOS Header Placing the jumper on pin2-3, it allows user to restore the BIOS safe setting and the CMOS data. Please carefully follow the procedures to avoid damaging the motherboard. 3 1 Pin 1-2 Close: Normal Operation (default). 3 ※ Clear CMOS Procedures: 1 3 1 Pin 2-3 Close: Clear CMOS data. 1. Remove AC power line. 2. Set the jumper to "Pin 2-3 close". 3. Wait for five seconds. 4. Set the jumper to "Pin 1-2 close". 5. Power on the AC. 6. Load Optimal Defaults and save settings in CMOS. J_COM1: Serial Port Connector The motherboard has a Serial Port Connector for connecting RS-232 Port. Pin Assignment 1 Carrier detect 2 Received data 3 Transmitted data 4 Data terminal ready 5 Signal ground 6 Data set ready 7 Request to send 2 10 8 Clear to send 9 Ring indicator 10 NC 1 9 16

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Motherboard Manual
16
JCMOS1: Clear CMOS Header
Placing the jumper on pin2-3, it allows user to restore the BIOS safe setting and
the CMOS data. Please carefully follow the procedures to avoid damaging the
motherboard.
1
3
Pin 1-2 Close:
Normal Operation (default).
1
3
1
3
Pin 2-3 Close:
Clear CMOS data.
※
Clear CMOS Procedures:
1.
Remove AC power line.
2.
Set the jumper to “Pin 2-3 close”.
3.
Wait for five seconds.
4.
Set the jumper to “Pin 1-2 close”.
5.
Power on the AC.
6.
Load Optimal Defaults and save settings in CMOS.
J_COM1: Serial Port Connector
The motherboard has a Serial Port Connector for connecting RS-232 Port.
Pin
Assignment
1
Carrier detect
2
Received data
3
Transmitted data
4
Data terminal ready
5
Signal ground
6
Data set ready
7
Request to send
8
Clear to send
9
Ring indicator
1
9
2
10
10
NC