Epson 386SX - Manual (Page 51)

When Auto speed is enabled, the computer automatically
switches to low speed whenever it needs to access a diskette
drive. It runs at high speed for all other operations.
There are different types of copy-protected programs.
Depending on the type you have, you may or may not want to
enable the Auto speed function. Follow these guidelines:
If you are using a copy-protected program that can run only
on a diskette or that requires a key disk, try to start the
program on high speed. If this works, you do not need to
enable the Auto speed function.
If you can’t load the program on high, enable Auto speed.
If you are using a copy-protected program that does not
require a key disk but requires a special procedure to install
the program on a hard disk, set the CPU SPEED switch on
the front panel to LOW while you are installing the
program. Once it is installed, set the switch to HIGH, where
you should be able to leave it while you load and run the
program.
If this does not work, try loading the program at low speed
and then switch to high to run it. Do not enable the Auto
speed function.
Follow these steps to change the Auto speed setting:
1. At the main Setup menu, highlight
Auto speed
and
press Enter. The current status appears:
Auto speed disabled
** SAVE SETTING **
If the displayed setting is correct, press to return to the
main Setup menu.
Running the Setup Program 2-13