From: Daniel O'Shea (dan_at_ozramp.net.au)
Date: 2007-04-12 12:33:40
Daniel O'Shea wrote:
> Jim, how possible do you think it is that your existing code could also
> be adapted to the VIC-20 or Atari paddle inputs? I'm not exactly sure
> how their timing works, but I do know that they use 1000pF capacitors,
> and 1M rather than 500K potentiometers... would it be as simple as
> listening for the interval between IRQs to know which system is connected?
I found some info on the Atari 2600 paddle interface here:
http://nocash.emubase.de/2k6specs.htm#controllerspaddles
...looks like the capacitor is actually 68nF, I got the 1000pF figure
from the Computer Controller Cookbook:
http://www.atariarchives.org/ccc/
which hadn't steered me wrong up until now... not sure if this is due to
the 1.8K series resistor, which is apparently not present in all 2600's?
Message was sent through the cbm-hackers mailing list
Archive generated by hypermail pre-2.1.8.