Reply To: Dreamcast Snow Screen

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Which board revision you have? I think all DC VGA sync issue are related to an issue in digitizer chip which has strict requirement for hsync/vsync alignment. Resistor R12 (which controls vsync delay) was changed from 330ohm to 220ohm for v1.6 PCBs since that improved compatibility of interlaced signals via VGA. However, that might have had a negative effect on some progressive sources as previous issue reports have all been for v1.6 PCB.