If you used GodMode9 to hack your system, you likely already have this file in your /gm9/out/ folder. Losing this file won't break your DS, but losing it and your system files later could be a permanent disaster.
On May 20, 2017, a hacker named derrek (with contributions from nedwill, plutoo, and others) released —an exploit that revealed a catastrophic flaw: the BootROM contained an unsafe hash comparison that allowed arbitrary code execution before the signature check completed. Boot9.bin 3ds
(often paired with boot11.bin ) is the dumped ARM9 Secure BootROM of the Nintendo 3DS. It represents the "Holy Grail" of 3DS hacking because it contains the absolute first code executed by the system's processor upon powering on, along with the hardware-level encryption keys used to secure the entire platform. Technical Significance The Root of Trust If you used GodMode9 to hack your system,
The file contains the primary bootloader code and, most importantly, the hardware cryptographic keys used by the 3DS's ARM9 processor. Because this code is baked into the console's hardware (write-once memory), it cannot be patched or updated by Nintendo. (often paired with boot11
: The Boot ROM is split into two halves. One half remains readable after the boot process, while the "protected" half—which contains sensitive keys—is locked early in the boot sequence and becomes inaccessible to the operating system Functionality