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 Setup 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

You can change the processor speed by entering one of the following commands at the MS-DOS prompt:

Ctrl Alt +Ctrl Alt -Ctrl Alt *

Changes the speed to high (20 MHz).

Changes the speed to low (simulated 8 MHz).

Tells the computer to change to low speed when it is accessing a diskette.

For the +, -, and • characters, press the keys on the numeric keypad. The commands do not work if you use the characters on the main keyboard.

Note

You can use the commands listed above while you are running a program. However, if you are running a program that uses one of the same commands for another function, you cannot use that command to change the processor speed. For example, if you are running a program that uses the Ctrl Alt - command to move the cursor, you cannot enter Ctrl Alt - to change the processor speed to low. When you exit the program, you can enter these commands at the MS-DOS prompt. Another alternative is to use the ESPEED program, described below.

4-4 Enhancing System Operations