I'm sorry I didn't reply back then, somehow the notifications stopped and I assumed there were no responses.
paulb_nl wrote:
More of the white background is visible in 320 mode but that is to be expected because the 320 pixels are only 70% of the line length(320/455) compared to 75% of 256 mode (256/341) and 320 Genesis (320/427.5).
That's why it would be really hard to match, but possible. And why I mentioned that they are intended to be circles, nor match exactly with one another originally. If you want to help me make them match, that's quite welcome. Right now I'm working on MDFourier for NES and SNES, but can alternate with this to improve the patterns.
Artemio wrote:
Is that with any margins around the circle? The 244x223 I mentioned is purely the big white circle in 320x224 resolution. The 320x224 and 256x224 circles are almost the same height (222 vs 223) so in this case they should be the same size on the CRT.
There is a one pixel border (top and bottom) in the 256 pattern, and a 1 pixel border only at bottom in the 320 pattern. I believe I made it so because I couldn't match a big enough circle with the right proportions (did this in 2014 and have no notes regarding this particular decision).
Here are my source filles:
http://junkerhq.net/Suite/linearity-PCE.rar
If I made a mistake please help me correct it. I can provide scope captures of the sync signals in both modes, and the output on various PVMS from OG HW.