New to OSSC. – Screen judder with Sega Megadrive over RGB

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  • September 12, 2018 at 11:30 PM #23151
    pomegran
    Participant

    Hi,

    I’m new to the OSSC – received it today. I have a SNES RGB connected without a problem but I have an issue with my modded Megadrive over RGB …

    Approximately every 5 seconds I get a screen judder. Very strange behaviour. Is there something I’m missing re setup? Any guidance is welcome.

    Thanks
    Mark

    September 13, 2018 at 8:22 AM #23152
    BuckoA51
    Keymaster

    Likely due to the off-spec refresh rate in your modded console, see https://videogameperfection.com/2012/06/22/what-causes-games-to-stutter/

    September 13, 2018 at 9:16 AM #23153
    pomegran
    Participant

    Yes, was just looking, thanks. My modded Pal Megadrive is reporting 59.36hz.

    I assume I would need a different Megadrive (Japanese) then to get this to sync properly?

    September 13, 2018 at 7:33 PM #23157
    BuckoA51
    Keymaster

    You could use a different Megadrive, or mod your existing one to NTSC timings, or alternatively fit a Dual Frequency Oscillator that will give correct timings for both PAL and NTSC, although I’ve been having trouble getting a new batch of these made up.

    Modding the console to NTSC timings is probably the cheapest way, we could almost certainly do that for you, I just need to find the parts.

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