NewHome › Forums › OSSC, OSSC Pro and DExx-vd isl › OSSC – Discussion and support › [Help] No image but Sync with SEGA Megadrive and MultiMega › Reply To: [Help] No image but Sync with SEGA Megadrive and MultiMega
This is an interesting problem. After a bit of searching, I found this thread https://assemblergames.com/threads/the-csync-on-genesis.53583/
As said above, the French mega drives don’t have Composite video (AV port pin 3) connected. They do have Csync (AV port pin 7) connected. Cheap 3rd party cables use Composite video for sync so your new cable wouldn’t work. As mentioned before, u need a quality cable which is wired for Csync. These cables from retro gaming cables https://www.retrogamingcables.co.uk/games-consoles/sega/mega-drive-1/sega-mega-drive-1-sega-genesis-1-sega-master-system-1-rgb-av-scart-cable-tv-lead say they are suitable for French mega drive and also OSSC. There is also a stereo audio version of the cable for better experience. They also have good info on RGB video and the difference between Composite video and Csync, for your information.