Epson 386SX - Manual (Page 136)

Using an AUTOEXEC.BAT File
You may want to run some commands every time you turn on
your computer. To run a command or a series of commands
automatically upon startup, you can type the commands in a
special file called AUTOEXEC.BAT. When you load MS-DOS,
it always looks for this file. If MS-DOS finds an
AUTOEXEC.BAT file in the root directory, it executes the
commands in that file.
Here are some tasks you can perform using an
AUTOEXEC.BAT file:
Modify the PATH command to include the directories
containing other software programs you commonly use.
This reduces the number of times you need to change
directories or specify pathnames.
Add the command to start your most commonly used
application program (such as a word processing or
spreadsheet program) so that it loads automatically when
you turn on or reset the computer.
Change the information the MS-DOS command prompt
includes.
See your MS-DOS Reference Manual for instructions on using
the PATH command, the PROMPT command, and any other
commands you want to include in your AUTOEXEC.BAT file.
Also see the chapter on batch processing commands in your
MS-DOS Reference Manual for detailed information about
AUTOEXEC.BAT files.
4-40 Using MS-DOS with Your Equity 386SX