CHAPTER 2 HARDWARE INSTALLATION
2-15
Serial Port Connectors: COM A and COM B
The mainboard provides two 9-pin male DIN connectors for serial port COM
A & COM B. These port are 16550A high speed communication port that
send/receive 16 bytes FIFOs. You can attach a mouse or a modem cable
directly into this connector.
PIN SIGNAL
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
6 DSR (Data Set Ready)
7 RTS (Request To Send)
8 CTS (Clear To Send)
9 RI (Ring Indicate)
PIN DEFINITION
1 2 3 4 5
6 7 8 9
COM A
Serial Port (9-pin Male)
COM B
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