When you play a DS game on original hardware, the game sends commands like "play this sound effect" or "read the X,Y coordinates of the stylus." The ARM7 BIOS translates those commands into physical actions.
The answer is . Nintendo’s engineers wrote the original BIOS in optimized ARM assembly language. While open-source BIOS replacements (like the one used in the Game Boy Advance emulator mGBA ) exist, the DS scene has historically struggled to create a perfect, 100% compatible replacement. dsi bios7.bin
If you have a Nintendo DSi gathering dust in a drawer, now you have a reason to power it on again. Extract that BIOS, fire up MelonDS, and experience DSi-enhanced classics in high definition on your PC. When you play a DS game on original