I have a 16:9 5" LCD screen for my Raspberry Pi 3. Naturally I want to play the games in their original 4:3 ratio, but it's stretching to fill the width of the wide screen.
I found the config file for Dosbox, but aspect=true doesn't seem to do anything. I notice output=texture, which seems to be unique to Batocera/Recalbox.
I also have no idea where to set this in VICE (C64 emulator).
I'm thinking of resorting to forcing overscan settings in the config.txt but that seems a bit heavy handed...