[Master System] I tried booting some Unlicensed and/or Aftermarket games. These are my findings

[OmegaOmega]

These ROMs are part of the No Intro set. There are 3 types of errors that I've found.

>Console boots without recognizing the cartridge, directly to the BIOS

Bobble Bobble (Korea) (En) (Unl) Zemina Rompack - Q-Bert + Sports 3 + Gulkave + Pooyan (Korea) (Unl) Ttoriui Moheom (Korea) (En) (Unl) Three Dragon Story, The (Korea) (Unl) Tank Battalion (Korea) (Unl) Tangram (Brazil) (Aftermarket) (Unl) Super Tetris (Korea) (Unl) Super Penguin (Korea) (Unl) Super Boy I (Korea) Super Boy II (Korea) (En) (Unl) Super Boy 4 (Korea) (Unl) Sudoku (Brazil) (Aftermarket) (Unl) Sky Jaguar (Korea) (Unl) Senha (Brazil) (Aftermarket) (Unl) Sagak-ui Bimil (Korea) (En) (Unl) Road Fighter (Korea) (En) (Unl) Puzzle Game (Korea) (En) (Unl) Ppang Gongjang (Korea) (En) (Unl) Power Boggle Boggle (Korea) (En) (Unl) Pooyan (Korea) (En) (Unl) Pigu-Wang 7 Hap - Jaemiiss-neun Game Mo-eumjip (Korea) (Unl) Palhacos (Brazil) (Aftermarket) (Unl) Nouka Densetsu (World) (Ja) (Aftermarket) (Unl)

**Error displayed by the console:

V1.3 Master System © SEGA 1996 Software Error**

11 Hap Gam-Boy (Korea) (Unl) 94 Super World Cup Soccer (Korea) (Unl) Astro Warrior & Pit Pot (Brazil) (En) (2011 Master System Evolution) [Not a bootleg] Thunder Blade (Taiwan) (En) (Unl) Super Arkanoid (Korea) (Unl) Suho Jeonsa (Korea) (Unl) Strider, The (Taiwan) (En) (Unl) Shangwei Mingling (Taiwan) (En) (Unl) Quartet (Taiwan) (En) (Unl) Northen Ken (Taiwan) (Ja) (Unl)

Game doesn't go even past the "SEGA" screen:

Super Boy III

Some games actually work! These are:

Wonsiin (Korea) (Unl) Waternet (Unknown) (Aftermarket) (Unl) Toto World 3 (Korea) (Unl) Street Master (Korea) (Unl) Skazka (Unknown) (v2.0) (Aftermarket) (Unl) Simpsons Trivia (Unknown) (v2.0) (Aftermarket) (Unl) Penguin Adventure (Korea) (En) (Unl)

[PikaSamus]

All the Super Boy games except 3 work for me on the latest nightly.

[FitzRoyX]

These games require the Japan region to be set

[LukeUsher]

Not a bug: most unlicensed and Japanese games do not have valid signatures and can NOT be started by a US or EU master system bios;

Make sure your emulation region is Japan, and that the bios you're using for the Japan region is a proper Japanese bios, not an international one.

@PikaSamus any chance you can create an issue for those three?

[PikaSamus]

Not a bug: most unlicensed and Japanese games do not have valid signatures and can NOT be started by a US or EU master system bios;

Make sure your emulation region is Japan, and that the bios you're using for the Japan region is a proper Japanese bios, not an international one.

@PikaSamus any chance you can create an issue for those three?

I have my preferred region set to Japan so that is likely why it worked. I don't think it's problematic.

[OmegaOmega]

Ooohhh I see. I guess the Japanese BIOS is more compatible then? Ares doesn't change the region automatically then?