Figure 2-7: Jumper W5 Pinouts - Datatech Enterprises Apex 386/25 User Manual

Turbo LED (Jumper WS)
Jumper W5 is used to connect a Turbo LED. You may connect either
pins one and two or two and three. The Turbo LED in the hardware
switch indicates operation in the Turbo mode.

Figure 2-7: Jumper W5 Pinouts

Turbo Switch (Jumper W4)
The Turbo switch allows you to toggle the speed of the microprocessor
between 125MHz and 25MHz. Note that if you are going to attach the
Turbo switch connector on the control panel, attach pins one and two
or pins two and three of jumper W4. If no cap is placed over the pins
of W4 this sets the default speed at 25MHz. Microprocessor speed is
also controllable from the keyboard by means of a software switch.
Refer to the figure on the next page for more about this.
T a b l e 2 - 5 : J u m p e r W 4
Jumper W5 Pinouts
Chapter 2: Setting Up Your System