Epson Equity 286 PLUS - Manual (Page 74)

When you install MS-DOS, it creates an AUTOEXEC.BAT file
for you. To modify the file or create another one, you can use
the COPY or EDLIN command, or a word processing program
that can save a file as a text-only file. However, be sure to name
the file AUTOEXEC.BAT and store it in the root directory of
the hard disk or diskette from which you load MS-DOS.
See your MS-DOS Reference Manual for more information
about creating and using batch files.
Changing the Processor Speed
Your computer’s processor can operate at two speeds: high and
low. High speed is 12 MHz, 1ow is 6 MHz. On high, the
computer can access memory faster than on low. Your processor
is set to operate at high speed unless you change the speed to
low or set the speed to change automatically.
You should use high speed for almost everything you do since
your programs will work faster. However, certain application
programs have specific timing requirements for diskette access
and can run only at the slower speed. See your software manual
to determine if this is the case.
4-2 Enhancing System Operations