Biostar A740X-A2+ Setup Manual page 21

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JCO M2: Serial port Connector
The motherboard has a Serial Port Connector for connecting RS-232 Port.
JKBV1: Power Source Header for PS/2 Keyboard and Mouse
A770 A2+/A740X A2+
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
10
2
10
Key
1
9
1
1
3
3
Pin 1-2 Close
+5V for PS/2 keyboard and
mouse.
1
3
Pin 2-3 close
+5V STB for PS/2 keyboard and
mouse.
19

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