: MAME 0.78 was the last version released before a major overhaul of the DCS sound system (used in games like Mortal Kombat ), which significantly increased CPU demands.
Since ROMs exist in a legal grey area, you won't find them on official app stores. To find the set, use these reliable search terms on reputable archive sites: "MAME 2003 Reference Set" mame 078 rom set download link
to organize these files and download metadata/media automatically. this ROM set specifically for Mame smart rom sorter tool available - Facebook : MAME 0
MAME is extremely picky. If you try to run a ROM from a newer set (like 0.250) on a 0.78 emulator, it likely won't work. Always ensure your ROM version matches your emulator core. this ROM set specifically for Mame smart rom
This is the "plug-and-play" version. Each ZIP file contains every single file needed to run that specific game. It takes up more disk space (around 12GB to 15GB), but it is much easier to manage.
You can build your own 0.78 ROM set by: