Many users still swear by or MAME32 , which have a classic Windows Explorer-style interface. These builds do not work correctly with modern BIOS packs (0.200+). If you attempt to use a 2024 BIOS file with MAME 0.139u1, you will likely encounter checksum errors. The mame 0139u1 bios pack is the only version that guarantees checksum stability for those legacy UIs.
Drop the zipped BIOS files directly into your /roms/ folder. Do not unzip them. mame 0139u1 bios pack
To use a (commonly used for MAME4droid or RetroArch's MAME 2010 Many users still swear by or MAME32 ,
While some cores look in the system folder, for arcade cores like MAME 2010 (0.139u1), it is safest to place the BIOS zips in the same directory as your game ROMs. mame 0139u1 bios pack