User's Manual

Selecting Execution Speed
The Apex can operate at two speeds: 4.77MHz or 9.54MHz.
At 9.54MHz, the Apex performs all tasks faster. Certain appli-
cations may have specific timing requirements and only operate
at the slower speed. See the application program manual to
determine the best operating speed.
When you turn on the computer, it runs at 4.77MHz. An
orange power light indicates the system is set at the slower
speed.
You can change the execution speed by typing a keystroke
combination, or by running the SPEED program that Epson
supplies on the GW-BASIC diskette.
To change the execution speed using the keystroke combina-
tion, hold down the Ctrl and Alt keys and press the slash (/) key.
The computer changes from one speed to the other each time
you press Ctrl Alt /.
You can also change the execution speed by running the SPEED
program. To change the execution speed to 4.77MHz, type the
following and press Enter:
SPEED /1
To change the execution speed to 9.54MHz, type the following
and press Enter:
SPEED /2
When you change the speed to 9.54MHz, the power light is
green and the computer sounds a high-pitched beep. When you
change the CPU speed to 4.77 MHz, the power light is orange
and the computer sounds a low-pitched beep. You can also
display the current execution speed by typing SPEED and
pressing Enter.
2-4 Using Your Apex