+rbairos Posted December 18, 2019 Share Posted December 18, 2019 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. Quote Link to comment Share on other sites More sharing options...
+batari Posted December 18, 2019 Share Posted December 18, 2019 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. 1 Quote Link to comment Share on other sites More sharing options...
+rbairos Posted December 19, 2019 Author Share Posted December 19, 2019 Thanks. So a pull down resistor on each, and possibly low pass filtering? Quote Link to comment Share on other sites More sharing options...
+batari Posted December 19, 2019 Share Posted December 19, 2019 Yeah, likely a filter to debounce the directional switches in the joystick. 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.