This emulator doesn't require any installation, just download uncompressed and open(except for the newer version)
Other emulators need installation for special regions but 3DS Emulator is region free.
The first time you open the emulator you will have the possibility to change your resolution.
when you open the configuration screen the default is the original size 800/240(2x 400x240 per eye WQVGA) and the lower screen 320x240 pixels.
You can change this however it would make the screen a bit more pixelated.
There is one thing you need to do in order in order to use to 3DS Emulator
You need to have the original BIOS of Nintendo 3DS, its illegal to use copy of a BIOS.
If the 3DS Emulator cant find a genuine BIOS the software wont run.
Once you have set everything up, you can play 3DS & DS ROMS with this 3DS Emulator.
Disclaimer: The 'Nintendo 3DS' is not owned by us and are trademarks, copyright, etcetera, of Nintendo.