User's Manual

Selecting Execution Speed
With the Apex you have the flexibility of operating at
two execution speeds: 4.77MHz or 8 MHz. At 8MHz,
the Apex simply performs all tasks faster. You will
normally want to run at the faster speed and take
advantage of this feature, but you can select the slower
speed to run application programs that have specific
timing requirements. Refer to your application
program manual to determine the best operating speed
for your program.
To change the execution speed, press the button on
the front panel:
If you want to run the computer at 8MHz, press the
button in. When you want to change the Apex’s
operating speed to 4.77MHz, press the button again to
release it. You can do this at any time without
rebooting the operating system.
When the power light on the front panel is red, the
computer is running at 4.77MHz. When the light
green, it is running at 8MHz.
2-4
Using
Your Apex