Re: Joysticks typical polling freq.

Den Thu, 12 Dec 2019 04:47:09 -0600 (CST) skrev "Ruben App."
<ruben_at_aparici.net>:
> How frequently would the C64 in a typical ML game would poll or would
> be able to poll considering the game logic, music and video, the
> Joysticks ? 250Hz, 1000Hz, faster ?

Are you asking from a software or hardware developer viewpoint?

I.E. do you want to make your own joystick controlled software, or do
you want to make your own hardware that acts as a joystick?

As long as the joystick input is controlling something visible on the
screen, there probably isn't much point in polling it more often than
each frame, at least for games that will perform some action
continuously when a direction is held or the button is held in it's
active position. For software that does a one time action each time the
user moves the joystick in a direction or presses the fire button,
there at least in theory might be reason for polling more often. Not
sure how often a real user might be able to wiggle the joystick or
bounce on the fire button though.

The hardware itself has more or less no limit except for how often the
CPU can read the port registers - i.e. perhaps say about 100kHz or so.
(with a SuperCPU you might be able to read the ports at 1MHz).

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