was released in October 2003 . While it is ancient by modern standards, it struck a perfect "sweet spot" for emulation:
Games requiring CHD (e.g., Area 51 , Killer Instinct , Cruis’n USA ) are not included in a standard 0.78 ROM set. Those came later. mame 0.78 rom set
To save space, MAME often uses a "Parent" ROM (the original version of a game) and "Clone" ROMs (regional variants or bootlegs). Non-Merged vs. Merged: was released in October 2003