It's often distributed in a "Full Non-Merged" format. This is crucial for new users—it means each .zip file contains all the data needed to run that game, including BIOS and parent ROMs. You can drag and drop any ROM from this set into the roms folder of MAME4ALL, and it should just work, without needing to worry about complex file dependencies.
Modern versions of MAME require robust PC processors to simulate complex arcade circuits. The 0.37b5 codebase represents a "sweet spot" in emulation history. It is light enough to run full-speed on microcontrollers, budget smartphones, and legacy systems while supporting the core golden age of arcade gaming. Breakdown of the "2270 New" Complete ROMset mame4all 037b5 complete romset 2270 new
The tag highlights that several games which were marked as "non-working" or "imperfect" in older 0.37b5 sets have been patched using later driver backports. Examples include: It's often distributed in a "Full Non-Merged" format