Reply To: OSSC sync settings required with Sega Mega Play hardware

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October 4, 2023 at 9:02 PM #58235
marqs
Participant

    I’ve to edit “Analog sync Vth” until I get the game displayed.

    That’s a sign of sync buffering / level conversion not being properly done in the supergun. Could you trace the path from JAMMA c-sync pin (P) to supergun c-sync output pin? Is there perhaps a buffer chip followed by a series resistor, or is csync output taken from CXA1145P pin 11?

    And I’ve finally got Green Beret/Rush’n Attack running, it needed a bit more than 5V.

    So sync issues with that after all? Are you sure Atomiswave is operational? It’d be strange if ossc reports ‘no sync’ via both JAMMA and VGA output.