MAME (Multiple Arcade Machine Emulator) releases new versions frequently—sometimes multiple times per month. Each version gets a version number. was released in December 2014 .
A is a complete collection of ROMs that perfectly matches a specific version of the MAME emulator. It is the "gold standard" for that version. If you have the MAME 0.159 emulator, you need the MAME 0.159 Reference Set to ensure every game in the list is playable. mame 2014 reference set mame 0159 roms chds top
The complete MAME CHD set is massive (hundreds of Gigabytes). Unless you are a data hoarder, do not download the full CHD set. A is a complete collection of ROMs that
A proper MAME 0.159 (MAME 2014) reference set requires version-locked ROMs strictly matching the 0.159 XML datfile, CHD version 4 images stored in parent-named subdirectories, and strict adherence to non-merged or split set structures. This configuration ensures deterministic operation within the MAME 2014 libretro core and is the recommended baseline for historical arcade emulation documentation. The complete MAME CHD set is massive (hundreds of Gigabytes)