User`s guide

[3]---- Button 1
[8]---- Ground
The +5V wire is easy to find. It will go to each pot and to one side of each
Button switch.
The Apple2 Ground wire goes to the 'bottom' end of each fixed resistor. You do
not need to label it; because it will be removed.
2. Once the wires are labeled, cut each about 1 inch from the point it goes into
the cable. Remove the cable. (Keep the cable; it may come in handy for some
later Apple2 project.)
Now, is the time to rewire the Buttons.
3. Remove (snip or unsolder) the two fixed resistors. If the Button 0 or Button
1 lead becomes disconnected from its switch during removal of a resistor,
reconnect the lead.
Check to see that, now, the Button 0 wire is the only one going to one side of
the Button 0 switch. The same goes for the Button 1 wire.
Snip off or unsolder the +5 leads going to the other side of each button switch
at the non-switch end. If a wire runs from one switch to the other, leave it
alone. If not, connect a wire from switch to switch. This is the "common" side
of the switches.
You want to end up with a single wire going to the common side of the switches
and separate Button 0 and Button 1 wires going to the other side:
____Button 0 wire
|
|
X B0 Switch
|
|
------- COMMON Wire
|
|
X B1 Switch
|
|____Button 1 wire
Label the COMMON wire as "GROUND"
4. The 330k resistors will help bring the outputs of the Apple2 X and Y 150k Ohm
pots closer to the 0-100k range PC prefers. Connect a 330k resistor 'across'
each pot-- i.e. from the center post to the post going to a +5 lead.