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Figure 4 Second Power LED
2.3 Configuring Jumpers
On the Apollo I there are four jumpers that must be set up for it to function properly. As shown below, place all of the
jumpers on the top two pins.
Figure 5 Jumper Configuration
The only jumper you that you should ever use is the CP jumper. It overrides the enable circuit and should only be used
for testing purposes. When the CP jumper is connected to the bottom two pins, the green and blue enable LEDs should
turn on (See Hardware Enable and Drive Enable Sections). Otherwise, the Apollo I is not working correctly.
3. Apollo I Overview
3.1 Setting up Your Parallel Ports
To connect to the Apollo I, you must have two parallel ports on your computer. Port 1 is on the left and port 2 is on the
right as shown below. Connect them both to the parallel ports on your computer.
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