System Speed Change
The 80486VESA system board can be configured for full or low
speeds to accomodate most DOS applications. On power up, the
system will be operating in full speed (factory setting).
You can switch between full and low speeds by toggling the turbo
switch or pressing the keyboard keys.
l
Toggling the Turbo Switch
1) Set the turbo switch to the on position to slow down the
system speed
2) Set the turbo switch to the off position to speed up the
system speed.
Pressing the Keyboard Keys
Note: Before using the keyboard keys to control the system speed,
the turbo switch has to be set to the off position.
1)
2)
Press the < CTRL > < ALT > keys while simultaneously
pressing the < - > key to slow down the system speed.
Press the < CTRL > < ALT > keys while simultaneously
pressing the < + > key to speed up the system speed.
Memory Caching
The 80486VESA system board provides an optional 64/128/256KB
external cache memory. The internal and external cache enable/
disable selections in the BIOS Advanced CMOS Setup program,
will turn ON or OFF, either the 80486VESA’s 8K internal cache or
external memory cache.
80486VESA User’s Manual 15
