MSI 845 PRO4 Instruction Manual download pdf (Page 24)

Chapter 2

2-12

Serial Port Connector: COM A & COM B

The mainboard offers two 9-pin male DIN connectors for serial

port COM A and COM B. The ports are 16550A high speed communica-

tion ports that send/receive 16 bytes FIFOs. You can attach a serial mouse

or other serial devices directly to them.

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 Inticate

1 2 3 4 5

6 7 8 9

9-Pin Male DIN Connectors

Midi/Joystick/Audio Port Connector

The mainboard provides a 15-pin female connector for connect-

ing a game joysticks/pads or MIDI devices.

The three ports at bottom provide the mainboard audio functions:

Line Out is a connector for headphone or speakers. Line In is used for

external CD player, tape players or other audio devices to be recorded by

your computer or played through the Line Out. Mic is a connector for

the microphone.

L-out L-in MIC

Midi / Joystick

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MSI 845 PRO4 Instruction Manual Page 24