tajume80 Posted January 16, 2020 Share Posted January 16, 2020 I just bought Retrotink 2X and I'm having problem with my s-video modded PAL 7800. There is a lot of scrolling (and wavy) lines across the screen. Does anyone have an idea what could cause this problem? Bad video chip etc? Quote Link to comment Share on other sites More sharing options...
+Mitch Posted January 16, 2020 Share Posted January 16, 2020 Which 7800 video mod are you using? Longhorn Engineer? Mitch Quote Link to comment Share on other sites More sharing options...
tajume80 Posted January 17, 2020 Author Share Posted January 17, 2020 1 hour ago, Mitch said: Which 7800 video mod are you using? Longhorn Engineer? Mitch I'm using Magic Knight s-video mod. Quote Link to comment Share on other sites More sharing options...
+-^CrossBow^- Posted January 17, 2020 Share Posted January 17, 2020 Because the Magic Knight board ties the two color bursts together from the TIA and Maria I've seen this before. Try removing the wire you attached to the Magic Knight board from the TIA colorburst and see if it clears up. It seems to be system specific and will show up more prevalent on some. If that does clear it up, then the only suggestion I have is to wire in a switch to turn the 2600 color signal on and off so that when playing 7800 games you don't see this. If you forget to switch it on for 2600 games, they will just be black n white until you flip it back on. The LHE mod had similar issues although with that board, there were attempts to isolate the two color inputs but the TIA color signal would still leak through. Quote Link to comment Share on other sites More sharing options...
tajume80 Posted January 17, 2020 Author Share Posted January 17, 2020 (edited) 1 hour ago, -^CrossBow^- said: Because the Magic Knight board ties the two color bursts together from the TIA and Maria I've seen this before. Try removing the wire you attached to the Magic Knight board from the TIA colorburst and see if it clears up. It seems to be system specific and will show up more prevalent on some. If that does clear it up, then the only suggestion I have is to wire in a switch to turn the 2600 color signal on and off so that when playing 7800 games you don't see this. If you forget to switch it on for 2600 games, they will just be black n white until you flip it back on. The LHE mod had similar issues although with that board, there were attempts to isolate the two color inputs but the TIA color signal would still leak through. Ok, thanks! I'll try to remove the wire and check if it helps, hopefully so! I forgot to mention that the inteference is more visible while playing 2600 games (as seen in the screencap of Ms. Pac Man). 7800 games look mildly better. Edited January 17, 2020 by tajume80 Quote Link to comment Share on other sites More sharing options...
+-^CrossBow^- Posted January 17, 2020 Share Posted January 17, 2020 Remember you don't want to leave it completely disconnected permanently as all 2600 games would appear in black and white without that color signal for them. Then again if you have a dedicated 2600 for 2600 games and never plan to use them on the 7800, then you could leave that wire disconnected. Quote Link to comment Share on other sites More sharing options...
juansolo Posted July 3, 2020 Share Posted July 3, 2020 We're currently diving down this particular rabbit hole with the PAL 7800 here, it's a thing: 1 Quote Link to comment Share on other sites More sharing options...
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