After installing Retro Pie according to the instructions, adding some themes (I settled on Cabsnazzy) and a set of Xbox 360 controllers, I downloaded some individual sample Roms to test the Mame emulator, an emulator that plays old arcade type games. What I discovered was that there are several different Mame emulators packaged with Retro Pie. For example, there is “mame4all”, “Mame 2000”, “Mame 2003 Libretto”, “Advance Mame”, etc.
Not any Mame rom will play in any Mame emulator. You need to install the correct “Romset version” of the Rom for each emulator. What does that mean ? Well, apparently various people have collected hundreds or even thousands of roms for a particular Mame version, customized them for that particular version of Mame, and packaged them into a “Rom Set”. The Rom Sets for each Mame Emulator are listed here at the Mame Retro Pie Wiki. To find a particular game and what RomSet it is in see here or here to download the entire lists of games for a particular Romset.
The first test I did was to download the Rom Set for Mame 2003. This Rom Set is 0.78. The download links are found at archive.org. The non-merged set is the one that will work with Emulation Station.
Previous MAME Releases. The latest official MAME release is available on the Latest Release page. Below is a collection of older MAME releases, dating back to the first official release from February, 1997. MESS only releases (prior to version 0.148) are available and are kindly hosted by AntoPISA at the MESS Repository. ROMSET COMPLETO DE MAME, com todas as imagens, basta descompactar e copiar as pastas para dentro do seu RECALBOX, RETROPIE OU BATOCERA DOWNLOAD ROMSET MAME.
For the Mame 2003 set (Romset 0.78, about 2 GB) the easiest way to download is in linux using the linux command line program “transmission-cli” which will download torrent files. Copy the TORRENT link shown on the archive.org page and use that with torrent-cli.
For example, to download the 0.78 Rom set on your Linux command line type: