You cannot use modern MAME ROMs with version 0.139u1. Arcade emulation requires a precise "ROM set" that matches the emulator version number. Non-Merged vs. Split vs. Merged Sets
When searching for games, you must specifically look for or "0.139u1 compatible roms" . Using ROMs from newer (e.g., 0.260+) or much older sets will result in missing files and game crashes. roms for mame 0139u1
This version is favored for mobile and budget hardware because it balances a wide game library with lower CPU requirements than modern MAME builds. SourceForge You cannot use modern MAME ROMs with version 0
A popular Libretro core used in RetroArch, Raspberry Pi setups (RetroPie, Recalbox), and low-spec mini PCs. Split vs
Larger, more modern games (like Killer Instinct or Area 51 ) use "Compressed Hard Disk" images. These must be placed in subfolders named exactly after the ROM zip.