First post, by root42
I have a Paradise EGA card HEGA IIIB, which works mostly fine. Text mode and 640x350 works like a charm. Only games running in 200 line modes (320x200 or 640x200 show lots of noise and flashing green bars that race through the image. What could that be and how can I debug this? I have multimeter and oscilloscope to measure stuff.
See video here: https://youtu.be/p4QXrXln9cU
Pictures of the card: