@mitu ah okay, so there's an improvised numberpad on there. A bit of a slanty one but that will do.

@testudo So, I finally got it to work with simcoupe. Something about my romset just wasn't working. Found a new one and it's working just fine! Thanks again for all of your help.

@Sebiohazard Please add more info about your system - https://retropie.org.uk/forum/topic/3/read-this-first.

@herb_fargus That IS my custom es_systems.cfg, but I've checked the other one and it's not doing anything that should conflict with that.

EDIT: Oh, wait! The SAM lines were in a weird place in the other es_systems.cfg and I hadn't spotted them. I don't actually see anything different in them to mine, but replacing mine with that one worked, so yay! Cheers :)