Happy gaming!
The "590" set is particularly associated with Kawaks and older versions of MAME (around 0.118 to 0.140). Specifically: NEOGEO 590 Roms Emulador Kawaks
NEOGEO was a legendary arcade platform introduced by SNK in the late 1980s, known for its high-quality games, unique hardware, and iconic titles like King of Fighters, Samurai Shodown, and Art of Fighting. The NEOGEO library boasts an impressive 590 games, many of which are still beloved today. Happy gaming