
Chapter 2
Serial Port Connectors: COM A & COM B
The mainboard has two 
1  | 2  | 3  | 4  | 5  | 
6 7 8 9
9-Pin  Male DIN Connectors
Pin Definition
PIN | SIGNAL | DESCRIPTION | 
1  | DCD  | Data Carry Detect  | 
2  | SIN  | Serial In or Receive Data  | 
3  | SOUT  | Serial Out or Transmit Data  | 
4  | DTR  | Data Terminal Ready)  | 
5  | GND  | Ground  | 
6  | DSR  | Data Set Ready  | 
7  | RTS  | Request To Send  | 
8  | CTS  | Clear To Send  | 
9  | RI  | Ring Indicate  | 
Joystick/Midi Connector
You can connect a joystick or game pad to this connector.
Audio Port Connectors
Line Out is to connect speakers or headphones. Line In is a connector for external CD player, Tape player or other audio devices. Mic is used to connect to a microphone.
Line Out Line In MIC
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 The mainboard provides 
Function.