krcroft wrote on 2020-02-11, 19:15:
7F20, if you have an analog CRT PC monitor, can you try driving it a higher resolution than 240p?
It's a CGA monitor, so it can't really increase the vertical that high. I have pushed it up to the ~260 line range for some console emulation stuff using modelines, but it can't do 400 vertical. Horizontal it can do ~640p no problem, so I can do hi-res text modes and stuff.
My starting point for a solution was that, if I had a very high vertical resolution, the scaling artifacts would be eliminated because there would be 10x worth of resolution to average together. However, jmarsh is telling me that it doesn't work that way, and that downscaling it will just do an integer multiple downscale and I'll still end up with the ugly extra line every fifth line.
It's too bad I can't get an interpolative downscaling from a high resolution.
Thanks for the idea though.