He's using a RetroArch core/libretro for MAME.
Oh I missed that..my fault. (and not sure how...it's right there!) hmmm..I don't see why you can't do that..it has to generate a list somehow.
Is there any place to downloade a mame 106 clone off romlist for attract mode?Or another external program to generate it?
I would think that a stock mame from version 0.106 would work.
EDIT: Well I want to help but I can't even get retroarch to load from the command line. (I'm on a linux-64..yes a computer not a pi) It will load fine from the menu/gui though. Strange
To load Retroarch from command line, you need to feed it the core name, and the romname and optionally, the path to the config file. i.e. "./retroarch -L <path to core> --config <path to retroarch.cfg> <rom location>" like
/opt/retropie/emulators/retroarch/bin/retroarch -L /opt/retropie/libretrocores/lr-fba-next/fbalpha_libretro.so --config /opt/retropie/configs/arcade/retroarch.cfg /home/pi/RetroPie/roms/arcade/ajax.zip
To import the Game names for Mame, you need to generate an xml file from an actual mame executable, using "mame --listxml >> mame.xml", and set the location of the mame.xml file under "additional import file(s)", and set info source to empty. Then You can use the xml output from the lastest mame, (or pretty much any mame, but roms that have changed may be slightly off for older versions)