Once you have your ROM set:
0.139u1 ROMs are usually zipped archive files containing several files extracted from the original arcade circuit boards. mame 0.139u1 roms pack download
Some larger, 3D, or disc-based arcade games require CHD (Compressed Hunks of Data) files. These must remain inside specifically named subfolders alongside your standard ROM zips. Once you have your ROM set: 0