polyex Posted May 14, 2017 Share Posted May 14, 2017 (edited) Using an Odyssey/2 with pluggable joysticks (factory) . The second player joystick port always acts as if the player is moving left, even if a joystick is not plugged in. I have tried plugging in a known working joystick but it makes no difference. I also checked to see if that pin for left (pin3) is grounded and it is not. I removed all the RF shields so I can access anything on the board. I am not an EE, but I can follow directions well :-) Any suggestions? Edited May 14, 2017 by polyex Quote Link to comment Share on other sites More sharing options...
metarog Posted May 14, 2017 Share Posted May 14, 2017 Try checking continuity from the jumpers behind that pin all the way back to the control chip which I think is IC8. If nothing is amiss then inspect the chip itself as that could be the culprit. Quote Link to comment Share on other sites More sharing options...
polyex Posted May 14, 2017 Author Share Posted May 14, 2017 (edited) Try checking continuity from the jumpers behind that pin all the way back to the control chip which I think is IC8. If nothing is amiss then inspect the chip itself as that could be the culprit. I have continuity back to IC8. I ordered a replacement. Edited May 14, 2017 by polyex Quote Link to comment Share on other sites More sharing options...
metarog Posted May 14, 2017 Share Posted May 14, 2017 Ok, let us know if you got it fixed. Quote Link to comment Share on other sites More sharing options...
+KylJoy Posted May 15, 2017 Share Posted May 15, 2017 ...and this is why I have two of everything. One standby unit with good working components in case I need to troubleshoot the other one. Good luck and let us know how it goes. Quote Link to comment Share on other sites More sharing options...
polyex Posted May 15, 2017 Author Share Posted May 15, 2017 I always feel silly ordering $3.00 worth of parts for $7.99 shipping from Mouser. I almost feel compelled to add stuff to the order just to justify the shipping costs. Quote Link to comment Share on other sites More sharing options...
polyex Posted May 18, 2017 Author Share Posted May 18, 2017 I desoldered both old chips and replaced them with a socketed Ti SN74LS365AN, which is supposed to be the equivalent chip. An odd thing happens when I start Armored Encounter. Both tanks fire once at the start of the game. I don't remember it starting like this. After that, everything is fine, the tanks move about and fire normally. Could have put in the wrong chip or something else? I cut the old chip legs getting them out. Quote Link to comment Share on other sites More sharing options...
+KylJoy Posted May 18, 2017 Share Posted May 18, 2017 Hmmm... I don't remember that either. How about other games? Do they work OK? Quote Link to comment Share on other sites More sharing options...
polyex Posted May 18, 2017 Author Share Posted May 18, 2017 Hmmm... I don't remember that either. How about other games? Do they work OK? Yeah, seem to. Quote Link to comment Share on other sites More sharing options...
Jess Ragan Posted May 18, 2017 Share Posted May 18, 2017 I think I wound up modding my Odyssey2 so it could use standard Atari and Sega joysticks. I mean, look, the Ody2 sticks are fine for what they are, but I wanted to use the Sega Arcade Pad instead, and they're just not compatible by default. Fortunately, it's not difficult... you just install new DB-9s and rewire them to Atari specs. Straight wire to wire stuff; no need for high/low voltage or any of that crap. Quote Link to comment Share on other sites More sharing options...
polyex Posted May 19, 2017 Author Share Posted May 19, 2017 I think I wound up modding my Odyssey2 so it could use standard Atari and Sega joysticks. I mean, look, the Ody2 sticks are fine for what they are, but I wanted to use the Sega Arcade Pad instead, and they're just not compatible by default. Fortunately, it's not difficult... you just install new DB-9s and rewire them to Atari specs. Straight wire to wire stuff; no need for high/low voltage or any of that crap. Mine already had the external joysticks. Quote Link to comment Share on other sites More sharing options...
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