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

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October 3, 2023 at 8:52 AM #58185
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    I mainly use default settings with :

    Video in proc/Video LPF 9MHz (SDTV)
    Video in proc/Pre-ADC Gain 4 (if I let default 8, white is too clear)
    Sampling opt./Allow TVP HPLL2x Off
    Sampling opt./Adv. timing tweaker 240p or 256×240 or 320×240 or 640×480 (depending of the game played)
    Sync opt./Analog sync LPF 2.5MHz or Off
    Sync opt./Analog sync Vth 123 to 169 (depending of the game played)
    Output opt./256×240 aspect 1:1 PAR
    Settings opt./Initial input Last used

    I have tested Atomiswave in VGA and via JAMMA port in 31 kHz, and got no sync. I think my settings are not enough complete. Could this hardware mod be useful ? https://junkerhq.net/xrgb/index.php?title=OSSC_AV3_use_AV1_RGB_mod

    Vega Jr. supergun has a small board with an LM1881, same board used in Sigma Raijin supergun.