How are people mapping systems like Atari 5200, Astrocade, ColecoVision, etc?
I am having a hard time figuring this out.
I don’t personally use any of those cores, but as a basic workflow, I typically check the docs to see what the default mappings are: https://docs.libretro.com/library/atari800/ and then try the default map and only change them if I find a problem with it, as most cores are designed around a “sane” default mapping.