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MiSTer-devel / Minimig-AGA_MiSTer

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Scandoubling in interlaced modes #130

Open boomlinde opened 3 years ago

boomlinde commented 3 years ago

While the scandoubler is enabled, my monitor refuses to display the video signal. The signal seems to revert to a non-scandoubled TV mode.

I understand that you can't properly form a complete interlaced picture comprised of both fields without a frame buffer, but Minimig-AGA on the original MiST still does a decent job at displaying the picture somehow. I guess it's just scandoubling the individual fields as though they were progressive frames. The result is still comparable IMO to the Amiga output on a 1084 (in terms of legibility and eye pain).

Could something like this be implemented for the MiSTer core?

boomlinde commented 3 years ago

Is this the right place to ask? It's unclear to me whether scandoubling is part of the MiSTer framework or entirely up to the individual cores.

sorgelig commented 3 years ago

Scandoubler doesn't support interlaced modes. Not sure if it will.

boomlinde commented 3 years ago

This can be considered a feature request, then. I don't know if much work would be involved in implementing it or if it's simply a matter of priorities and goals for the project, but I think VGA monitors are a great option for low-latency analog display for the MiSTer except for the lack of support for interlaced modes. I think a solution implemented similarly to the MiST scandoubler would be a great addition even if it only displays otherwise unprocessed fields one at a time.