Re: Joystick for IIe platinum

["Mark Cummings" <NOTfigjams@primus.com.au>]

As Bill and Rubywand point out, the Apple use 150K pots and the PC uses 100K
pots.
The effect of having the wrong pot will be to alter the range of inputs to
the PC or Apple.
So you may not be able to get all values from 0 to 255 when reading the
input.
150K pots are not available anymore (at least in Australia), 100K pots are
more common.
The adaptor box that is refered to in Rubywands link adds capacitance to a
PC joystick to trick the Apple into thinking it is connected to a 150K pot,
and therefor will have the correct range of motion.

Mark


"Quadrajet1" <quadrajet1@aol.com> wrote in message
20020604121929.04527.00000286@mb-mv.aol.com">news:20020604121929.04527.00000286@mb-mv.aol.com...
<snip>
> >If you have a soldering iron you can build an adapter for PC Joysticks.
> >You need plugs for the ends, some wire, two resistors and two styroflex
> >capacitors. This adapter works well with all PC joysticks that have no
> >extra electronics (like autofire etc.). An adapter that works with all
> >DOS-compatible PC Joysticks can be built with a couple more elements.
>
>    Right, the Atari joysticks are built differently.  But I always was
under
> the impression the resistor value of the pot inside the Apple and the PC
> joystick was different.  PC used a 150k ohm pot, the Apple used a 50k ohm,
for
> example.  I know I used to see joysticks with a switch on the bottom to
switch
> from PC to Apple operation.