User`s manual

A770 A2+/A740X A2+
19
JCO M2: 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
10 Key
1
2
9
10
JKBV1: Power Source Header for PS/2 Keyboard and Mouse
3
1
Pin 1-2 Close
+5V for PS/2 keyboard and
mouse.
1
3
3
1
Pin 2-3 close
+5V STB for PS/2 keyboard and
mouse.