Serial Port Connectors: Com A & Com B; Joystick/Midi Connector - Premio Computer Athena system System Manual

Chapter 2
Serial Port Connectors: COM A & COM B
The mainboard offers two 9-pin male DIN connectors as serial port COM
A & COM B. The ports are 16550A high speed communication ports that
send/receive 16 bytes FIFOs. You can attach a serial mouse or other serial
devices directly to the connectors.
1 2 3 4 5
6 7 8 9
9-Pin Male DIN Connector

Joystick/Midi Connector

You can connect a joystick or game pad to this connector.
Pin Definition
PIN SIGNAL
1 DCD
2 SIN
3 SOUT
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
2-10
DESCRIPTION
Data Carry Detect
Serial In or Receive Data
Serial Out or Transmit Data
Data Terminal Ready)
Ground
Data Set Ready
Request To Send
Clear To Send
Ring Indicate