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rbairos

2600 extra cap to gnd on 6532 pin 8.

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Hello.

Looking through the atari NTSC schematics on this site, I notice, Pin 8 of ic 6532  has a tie to ground through a cap.
This corresponds to pin 1 of right joystick.

Why only that pin and not the others?

Thanks,
Rob.
 

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I had to look and see. I think the cap is on all 8 of the SWCHA pins, actually, as it says "0.001 Typ. 8."

 

I haven't seen this sort of thing on many schematics as it's confusing, but such a notation is common on other kinds of engineering plans (such as mechanical drawings) to show a part that is typical for a given connection but left off of the rest because it would complicate the drawing.

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