Because MAME is constantly evolving, the files required to run games (ROMs) change between versions. A ROM set designed for MAME 0.139u1 will not necessarily work on the newest version of MAME (e.g., MAME 0.250+), and vice versa.
Even though it was released in 2010, users stick to this list because it is highly optimized mame 0139u1 roms list
To use this set properly, you need to understand three types of ROM files often found in these lists: Because MAME is constantly evolving, the files required