Here is everything you need to know about finding, downloading, and using this specific romset. Why MAME 0.139 is Still Popular
Many pre-configured RetroPie builds, old Xbox emulators (CoinOPS), and lightgun PC cabinets were built around 0.139. If your hardware struggles with modern MAME (0.250+), 0.139 is your best friend. mame 0.139 romset download
Before you click any download link, you must understand one brutal reality of MAME: Here is everything you need to know about
If you have access to a Usenet provider (Newshosting, Eweka), search for "MAME 0.139" in NZB indexes like NZBGeek. This is the safest method after Archive.org. old Xbox emulators (CoinOPS)