This usually means you have a "Split" set instead of a "Merged" set. In a merged set, the parent game and all its clones (different regions/versions) are in one zip file. Some early games (like Donkey Kong ) require a separate "Samples" folder containing
As with all MAME discussions: You are expected to dump your own arcade PCBs. However, in practice, the ROM set referenced above exists widely on archive sites. We do not condone piracy, but we acknowledge the reality of the hobby. mame 0106 roms
: Official sites like mamedev.org host a limited selection of ROMs that have been released for free, non-commercial use by their original creators. This usually means you have a "Split" set