Changing Serial Port (RS-232C) Settings

Use the Primary serial port and Secondary serial port options to change the default parameters for the serial ports installed in your computer. The primary serial port is the one that you refer to in MS-DOS as COM1:- normally the built-in serial port. You might use this port for a serial printer, or an external modem. The secondary serial port is the one you address as COM2:- normally a serial port on an option card. This might be the name used for an internal direct modem.

For example, if you have a serial printer attached to the built-in serial port, you can use the Primary serial port option to match the computer’s parameters to the printer’s switch settings so that you do not need to use a MODE command to set up the serial port when it is needed.

The process for changing the default serial port settings is identical for the primary and secondary serial ports. This section uses the primary serial port as an example.

To alter the primary serial port parameters, move the cursor to Primary serial port and press Enter. You see a menu of serial parameters similar to this:

Baud

rate

110 bps

Parity

None

Data

length

8

bits

Stop

bits

1

bit(s)

***

SAVE SETTINGS

***

 

 

 

 

 

 

 

 

To set the speed of communication, move the cursor to Baud rate and press Enter. The screen displays:

110bps

150bps

300bps

600bps

1200 bps

2400 bps

4800 bps

9600 bps

19200 bps

38400 bps

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