If you already have a ROM set but it isn't specifically version 0.139, you can use management tools to verify or "rebuild" your files: MAME0.139RomCollectionByGhostware directory listing
MAME versions are strictly tied to specific romsets; a game file that works in version 0.276 will likely fail in 0.139 because file requirements change over time. mame 0139 romset download upd
MAME 0.139 ROMset is a specific collection of arcade game data files released in July 2010. While considered "ancient" by modern PC standards, it remains one of the most sought-after sets because it is the primary compatible version for popular mobile and low-power emulators, most notably MAME4droid (0.139u1) on Android. Google Play Why MAME 0.139 is Still Relevant Android Compatibility : It is the baseline for MAME4droid If you already have a ROM set but
Do search for “MAME 0.139 ROM set download” or “full non-merged set” – those almost always lead to copyrighted content. Even if a site claims “abandonware,” arcade ROMs remain under copyright. Google Play Why MAME 0