Emulation itself is legal in most jurisdictions. The act of writing a program that mimics another computer system has been upheld as legal in cases such as Sony v. Connectix and Sony v. bleem! .
An unofficial, highly recommended BIOS (e.g., uni-bios_4_0.rom ) that allows you to change regions, toggle cheats, and switch between Arcade (MVS) and Console (AES) modes on the fly. How to Install the BIOS YouTube·Anthro Arcadehttps://www.youtube.com mame neogeo bios