Batocera starts MAME with -rompath <romDirname>;/userdata/bios/mame;
/userdata/bios, /userdata/roms/mame and the softlist folder added for
MESS systems, and -samplepath, -artpath and -crosshairpath below
/userdata/bios/mame (generators/mame/mameGenerator.py:129-143, 189 at
batocera-43.1, MAME_BIOS in mamePaths.py). No extractor read that
generator. It now goes through the generic reader KNULLI uses for its fork
of the same file, keeping the command line search settings: the
Macintosh boot disk the command names is a file.
Rescraped at batocera-43.1: the six records are the only change.
Manifests: Batocera drops samples/bbc.zip at the BIOS root, read by
neither build. mame/samples/bbc.zip, which its list declares, serves both.
The sets stay at the BIOS root, which the rompath lists.