biosemulation
Recently, I got MyBoy! full, and when I go through the "Settings" page, I see an option that says "Use BIOS" (Settings > Advanced) and a file explorer with it that allows you to search the BIOS file.
My questions are:
To the best of my knowledge such software does not exist. Most of the hacking work in the area is in making gamepads do keyboard like things, rather than emulating gamepads with keyboards.
Dolphin has 3 different 3D modes. Side-by-Side, Top-and-Bottom, and Anaglyph. The 3D settings are located in Options → Graphics Settings → Enhancements → Stereoscopy.
Side-by-Side and Top-and-Bottom 3D are what you're looking for. This splits the image in half across the screen, and should be compatible with any modern 3D TV.
As Assorted Trailmix mentioned, Dolphin also supports Anaglyph 3D, just in case you have any Red/Cyan 3D glasses lying around.
If you're interested in the history of Dolphin's 3D support, I recommend reading A Second Perspective: An In-Depth History of Stereoscopy in Dolphin. It's an interesting look into both the technical details and history of Dolphin's 3D functionality*.
*Note: I'm friends with one of the Dolphin Emulator blog writers, so I may be a bit biased. :)
Best Answer
BIOS is actually an acronym standing for Basic Input/Output System. It is a term used to refer to the set of computer instructions that are built into the system which initialises the hardware when it's switched on.
At a very basic level, emulators 'pretend' to be the system that they are emulating. In order to do this, they must still "initialise" the fake hardware so that the Operating System/Program (in this case, the game you're playing) - can still access stuff like the buttons, speakers and the screen in order to make things happen.
The emulator acts as a go-between: it accepts the game's commands to the original hardware, translates it into something your current hardware can interpret, and back again. For example: play a sound or music, draw a character to screen, or accept your input from pressing buttons.
Why enable it?
Whilst the emulator you're using may come with a default BIOS file and this may work for the majority of the games that you are playing, you might find that a game may not work with the default. BIOSs, like the hardware they were pulled from, can be region-specific.
Say you get a hold of a Japanese-exclusive copy of a game.
Does the BIOS increase the performance of the game?
Ehhhhhhhh... kinda. It can improve performance, but any improvement will only be because of the specific version of the game/BIOS you're running.
As a real-world example: The Sonic the Hedgehog games run slower in PAL regions (AU, EU), and faster in NTSC regions (US). If you have an EU copy of the game with an EU BIOS, you will notice that it's slower compared to the US copies of the same game). But again, that's game-specific.
Is it recommended to use a BIOS?
If your games are running fine without loading in a custom BIOS, then there's no need to use a custom BIOS. Only override the default if you find you're having issues.