CHAPTER 2 HARDWARE INSTALLATION
2-17
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 DEFINITION
1 2 3 4 5
6 7 8 9
COM A
Serial Port (9-pin Male)
COM B
PIN SIGNAL
1DCD (Data Carry Detect)
2SIN (Serial In or Receive Data)
3SOUT (Serial Out or Transmit Data)
4DTR (Data Terminal Ready)
5GND
6DSR (Data Set Ready)
7RTS (Request To Send)
8CTS (Clear To Send)
9RI (Ring Indicate)