The "legal" and standard way to obtain it is to using tools like GodMode9. Once you have dumped it, you should keep it in a safe place (like a cloud backup) because it is essential for recovering your console if it ever becomes "bricked." Where Should the File Go?
Find boot9.bin . Press (A) on it and select "Copy to 0:/gm9/out". boot9bin file
Would you like to know more about a specific aspect of the boot9bin file? The "legal" and standard way to obtain it
In the world of Nintendo 3DS homebrew, is the "Holy Grail"—the binary dump of the system's BootROM. For years, this file was the missing piece that prevented total control over the console's hardware. 1. The Fortress: What is Boot9? Press (A) on it and select "Copy to 0:/gm9/out"
The 3DS has two main processors: the ARM11 (for games) and the (the security processor). When you turn on a 3DS, the ARM9 is the first thing to wake up. It runs a tiny piece of code called the BootROM .