What about running a newer romset on an older version of MAME?
I have the full romset for v1.18, but all I want is to play the classic arcade games (pacman, galaga, bombjack, wonderboy etc).
Is it better to play these with MAME v1.18 or newer, or with an older version, like v0.99 as TOK suggested?
Or is there some app that 'downgrades' the romset accordingly to the MAME version. If so, is there any benefit to this?