Note

Another way to change the real-time clock's time and date

is with the MS-DOS (version 3.3 or later) TIME and DATEcommands. See your MS-DOS Reference Manual for instructions.Changing Serial Port Settings

The primary and secondary serial port settings let you change the default values for the serial port(s) in your computer. If you are using the built-in serial port or an additional serial port you have installed in the computer, use these options to set or change the parameters required by the port to send and receive data.

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 settings. This eliminates the need for you to use the MS-DOS MODE command to set up the serial port when it is needed. (See the MS-DOS Reference Manual for more information on the MODE command.)

The primary serial port is the one that MS-DOS recognizes as COM1 and is usually the built-in serial port. The secondary serial port is COM2 and this is usually an additional serial port provided by an option card.

Note

You can reverse the assignments so the built-in port is

secondary and the optional port is primary by changing the DIP switches on the computer and on the optional port. See "Setting the DIP switches," above, for more information.

A-10 Changing DIP Switches and Using Setup