Neo-Geo AES?

is it possible to play Neo-Geo Roms in “AES Mode” ? If i use mame2003/fba all games run in “MVS Mode”. Is the a setting to change that? or can i use a special (Uni-)Bios for enablig the AES-Features (like difficulty settings) in Lakka/Retroarch ?

Yeah, you can use unibios.

Yeah, works great. i had just switch to aes/unibios in fbalpha settings-menu. thank you

What is the advantage of running them in AES mode?

on most games you getting a main selection screen for the gamemodes (Story/Arcade,1P vs. 2P) and sometimes even exclusive Optionescreens for Settings like difficulty, time, game-speed, language and more…