Entering Keyboard Commands - Epson 3865X Plus User Manual

There are three ways to change the processor speed:
If you frequently use programs that require the processor to
operate at low speed or require the automatic speed change
when your computer is accessing a diskette, use the Setup
program to change the processor speed. See Chapter 2 for
instructions.
If you use these programs only occasionally, you should use the
keyboard commands or the ESPEED program (described below)
to change the processor speed.

Entering Keyboard Commands

Whenever you are at an MS-DOS command prompt, you can
change the processor speed by entering one of the following
commands:
CTRL ALT +
CTRL ALT -
CTRL ALT *
Enhancing System Operating
4-4
Changes the processor speed to high
(16
MHz).
Changes the processor speed to low
(simulated 8 MHz).
Sets the processor speed to change to low
speed automatically when the computer is
accessing a diskette.