Same as current first generation R4 3DS backup tools this emu supports only DS-MODE on Nintendo 3DS. It mimics the operation of a R4 3DS Flash Card such as R4i 3DS, AceKard 3, SuperCard DSTWO and CycloDS iEvolution on N3DS. R4 3DS Emulator also known as Nintendo 3DS R4 Flash Card emulator is based on the freeware NDS emulator No$GBA.
It can also be used for playing games on PC if you do not have a Nintendo 3DS consoles. R4 3DS Emulator can be used for testing how DS games will work on a R4 3DS Flash Card. A Nintendo 3DS emulator with flash card support