The "2270" set is favored because it provides a "sweet spot" for performance. Modern MAME versions (like 0.2xx) require significantly more CPU power because they prioritize extreme accuracy over speed. In contrast, the 0.37b5 core uses less demanding emulation techniques, allowing games like Mortal Kombat or NBA Jam to run at full speed on "tin can" hardware that would struggle with newer ROMsets. Key Compatibility & Features find working MAME romsets for a given emulator/Pi model
What kind of games are in this 2,270-strong library? This version of MAME covers what many consider the "Golden Age" of arcade gaming. mame4all 037b5 complete romset 2270 new