The keyboard controllers do. They are constucted as an x-y grid.
The 4 RIOT lines are connected to x[3:0]. The trigger input and the
2 paddle inputs are connected to y[2:0].
E.g. you first set x[3:1] to 0 and x[0] to a 1 (or vise-versa) then read the
the 3 inputs to see if any of those buttons are pressed. This pattern
repeats for the other x values.
I believe the paddles operate in a similar way. Set the necessary outputs
to 1, then read the paddle inputs.
Kirk you've done this recently, do I have it right?
-Chris
On Thu, 22 Apr 2004, Adam Wozniak wrote:
> Do any games or controllers configure the 6532 (RIOT) port A pins
> as outputs, or are they always used input only?
>
> I suspect the various development tools that use the game controller
> ports as serial ports must configure port A pins as outputs, but does
> anything ELSE do this?
>
> --
> adam@xxxxxxxxxxxxxxxx http://cuddlepuddle.org/~adam/pgp.html
> http://cuddlepuddle.org/~adam/resume.html
> "The dinosaurs are not around today because they did not have a space program."
> -- Arthur C. Clarke
>
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