I would like to know how out of/up to date it is compared to current, since the 2003 standalone version is obviously 20 years old. Libretro Forums

You generally need a full MAME 0.78 set and a MAME 0.139 set as your source material. These two combined contain nearly all the files required to build the Plus version.

: Essential for games with analog sound (like Donkey Kong or Galaga ). Place these in your system/mame2003-plus/samples folder. 3. How to Update Your Old 0.78 Set