The title almost says it all. Up till version X, MAME had a built in hack to save highscores for the classics from the 70-ies and 80-ies, which lost their high-scores after turning the machine off and on. Today with the more accurate emulation of MAME, the highscores are wiped, as running a MAME emulation is similar to booting a machine. So which version still had the hack for high-score saving?