I installed Batocera, copied some MAME 2003 (v0.78) ROMs to the USB and it works! But the games run really slowly, so I want to try to use imame4all (based on MAME v0.37b5) instead.
I played around with the mame.core=... and neogeo.core=... options in recalbox.conf, but the games don't start (returning to the menu after a blank screen and a delay) . And I couldn't find any documentation to explain how to change the MAME version.
Do I need to download some extra imame4all files and add them to the USB stick, or...???
Can anyone help? :-)