To fully enable DSi emulation, you typically need a set of four distinct files: : The ARM7 BIOS file (64KB for DSi mode). : The ARM9 BIOS file (64KB for DSi mode). firmware.bin : The system firmware (128KB).
No. For regular DS games (not DSi-enhanced), you can use free, open-source BIOS alternatives (like ds_bios.bin dumps from a DS Phat or Lite) or HLE mode. DSi BIOS is only required for DSi-exclusive features. dsi bios files download