(Multiple Arcade Machine Emulator) was a labor of love for purists. Finding the "updated" files meant scouring old FTP servers and whispered links in IRC channels. He needed that one specific revision where the ghosts moved exactly right, and the Street Fighter II dump that didn't crash during the bonus stage.
The MAME romset is a "frozen" collection frequently used by mobile emulators like MAME4droid on Android . Because MAME requires ROM files to exactly match the metadata of a specific version, you cannot use modern MAME ROMs with this older 0.139u1 version. 🕹️ Finding the 0.139u1 Romset roms for mame 0139u1 updated