How does dual-slot mode *technically* work?

How does dual-slot mode *technically* work? nintendo ds gameboy slot The Nintendo DSi plays Nintendo DS Game Cards inserted into the Game Card slot Please note that the Nintendo DSi is not compatible with any Game Boy or Game nintendo switch game slot The original model of the Nintendo DS and the DS Lite included a GBA slot so the system can play GBA games, Nintendo allowed DS game developers to use the

nintendo switch game slot Is there a way to enable the use of a Game Boy Advance cartridge on Slot-2 while playing a Nintendo DS game? It's usually seen on Generation

nintendo ds lite gameboy slot Remove the Game Pak Slot Cover from the Game Pak Slot · With the label side of the Game Boy Advance Game Pak facing away from the Nintendo DS Lite, Official Nintendo DS Lite GBA Slot Cover ; Manufacturer, ‎Nintendo ; ASIN, ‎B007KB9MF6 ; Item model number, ‎USG-005 ; Customer Reviews, out of 5 stars 14