If you look at the circuitboard, you can actually see a jumper point that differs based on games running in Game Gear mode ( Sonic the Hedgehog 2, for example) and Master System mode. But when the pin is high (tied to +5V), it acts as a Master System. When this pin is low (0V), the Game Gear will act as a Game Gear. To be consistent with other usages on this blog, you might call it GG'. Notice in particular pin 42, on the top right, labeled GG. Take a look at the pinout of the Game Gear cartridge. Nothing in the ROM tells the Game Gear whether it’s running a Master System game or not. And to be totally, honest, that’s not so different from the hardware. These emulators only emulate the Game Gear mode when you choose a Game Gear game otherwise, you need to load the ROM in Master System mode. Take, for example, the byuu/ares v115 emulator: (Newer versions may have fixed this I tend to use this version because it’s my fork where I support the SuperGrafx CD from a menu option) In fact, in many emulators, OutRun Europa won’t run correctly unless you run the game in Master System mode. The Game Gear has a mode where it is literally a Master System, and OutRun Europa, as well as anything using a MasterGear Converter, runs in it. See, as far as OutRun Europa is concerned, the Game Gear isn’t just similar to the Master System. How do I port this game from the Game Gear to the Master System? Let’s take a totally arbitrary game: OutRun Europa. The Sega Game Gear is very similar to the Master System. Thanks to Bob from RetroRGB for the post idea. And the best example, the exception that proves the rule: the Sega Master System and the Sega Game Gear. For you to be able to do this, the two platforms would have to be near-identical to begin with. 8-bit games are almost always written in assembly, and also take advantage of the platform-specific features. And the answer is invariably the same: there is no way to do so without rewriting the game from scratch.

Sometimes people ask me: “Nicole, how do you convert a Master System game to the NES?”, or some other combination of game consoles.

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