I have my rapberry pi connected to an RGB TV 15kHz with a HDMI to VGA adapter and a custom VGA to SCART cable. I used to have retropie on my raspberry pi and I was able to change resolution per system to keep every scanline like the original, for instance, Megadrive 320x224, Master System 320x192, etc. but I installed batocera which I like much more but I lost the ability to do that.
If I enter retroarch settings within megadrive and change the resolution to 320x224 and the leave and enter Mastersystem the resolution is 320x224, if I enter mastersystem and change 320x192 and save, when I go back to Megadrive the resolution is 320x192.
I would like for the setting to be saved PER SYSTEM and not affect all the systems, in retropie I was able to keep each system at their own resolution, I would like to do the same with batocera. How do I do that?