SegaXtreme

I would like to test a few alternative resolutions on the Saturn. I found this thread: Progressive hires test demo? which says that the Saturn can output 480p.

1) Is there any homebrew source code available that supports 480p? Charle's MacDonald's C4-2006 demo doesn't appear to include source code.
2) I understand RGB Scart cables are required. I'm assuming the HD-Retrovision are also functionally equivalent?
3) Would modern TVs actually be able to display this? From what I understand it the resolution is 480p@15hz.
4) If a modern TV cannot support this resolution, would it work with an OSSC or Framemiester?
5) What other resolutions are possible? 720p? 1080i?

Thanks in advance.
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