cdi2015 libretro core is based on mame2015 and aim to make playing Philips CD-i games easier,
It's lightweight and faster than newest mame core and easy to use, and tested with x86/x86_64 and retropie/batocera for RPI 4B/CM4.
make SUBTARGET=cdi
'cdimono1.zip' from mame romsets is needed as bios file, user need to put 'cdimono1.zip' to retroarch bios dir or same dir with 'chd' files.