[Coladam] analog vs. digital joystick input
rfd at case.edu
Wed Sep 4 14:58:20 CEST 2013
On Wed, 4 Sep 2013, Kevin Powers wrote:
> On Tue, Sep 3, 2013 at 11:42 AM, Geoff Oltmans <oltmansg at gmail.com> wrote:
> > Only digital. There are no adc inputs in the joystick ports.
> What about via a pair of Atari paddles?
I believe that the Expansion Module #1 (though I have never seen a
schematic or been inside one) is what accepts analog inputs from Atari
paddles (i.e., with the potentiometer). Remember, the EM1 uses only the
video modulator and speaker-out systems from the ColecoVision: it basically
shorts out the Z80 and the TMS9918 VDP. Atari 2600 games use a 6502 CPU and
totally different video, and all that extra hardware is inside the EM1.
Plugging an Atari pot-paddle into a ColecoVision game controller
port may not be a good idea.
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