When you install MS-DOS, it creates an AUTOEXEC.BAT file for you, which you can modify or replace as described above. 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 manuals for more information about creating and using batch files.

Changing the Processor Speed

Your computer’s processor can operate at two speeds: fast

(33 MHz) and slow (simulated 11 MHz). At fast speed, the computer can access memory faster. This is the default setting unless you change the speed to slow with SETUP or the ESPEED program or set it to change automatically.

Note

When your computer is operating at fast speed, the TURBO light on the front panel is on. It is off when the computer is operating at slow speed.

You should use fast speed for almost everything you do because your programs will work faster. However, certain application programs have specific timing requirements and can run only at the slower speed. See your software manual to determine if this is the case.

Some copy-protected programs require the computer to run at slow speed while accessing the program on a diskette. These programs also usually require you to leave a key disk-the one that contains the copy protection-in the drive. If you use a copy-protected program often, you may want to set your processor speed to change automatically to slow speed when accessing the diskette and return to fast when it is finished.

2-2 Enhancing System Operations