how are you doin’? I don’t see any responses to your post hence I’m jumping in.
I don’t see what you’re doing wrong here. are you sure to have only one COMMAND line not commented out (without # in front of it)? Do you have any errors or output to help diagnose your issue? Also did you try upgrading to Retropie/Emulationstation latest release?
just don’t use this one and switch for piFBA instead. Your games will run at fullspeed and it’s easier to configure as well. Put your bios file within the neogeo “roms” directory. There are a lot of posts in this forum and in the wiki to configure it properly.
3. MAME PI
mame4all-rpi is the one to use here. As for piFBA just put your bios in the mame “roms” folder.