Never use the Stock Top Loader BIOS unless you are a masochist. The UniBIOS is objectively the best for emulation because it bypasses SNK's slow disc verification routines. A Hidden Feature: The "AES Mode" Hack One cool trick only possible via the BIOS in NEO.EMU: Turning off the CD interface.

If you are a fan of SNK’s golden era—the era of Metal Slug , King of Fighters ‘98 , and Samurai Shodown —you have likely heard of NEO.EMU . For Android and iOS users, it remains one of the most accurate, low-latency ways to play Neo Geo CD games on a touchscreen or controller.

The BIOS is the gatekeeper to that audio experience. Without the right BIOS, NEO.EMU cannot stream the CD audio tracks. With the UniBIOS and a CDZ config, you get the best of both worlds: Arcade speed + CD quality sound.

The on the Neo Geo CD is not just a "boot screen." It is the operating system of the console.