boot9.bin — 32 kilobytes of machine code — was injected directly into the boot ROM's shadow space. It wasn't permanent, but it was alive. The 3DS booted. The familiar popping sound of the home menu echoed through the silent basement.
: Tools like custom-install (for fast game installation) or title database rebuilders require boot9.bin to decrypt and process system data on your computer. Boot9.bin 3ds
The file will now be on your SD card in the /gm9/out/ folder. Why You Need It The familiar popping sound of the home menu
(including the "KeyScrambler" algorithms). These keys are required to decrypt every other layer of the 3DS firmware, from the NAND partitions to the games themselves. Sighax & Boot9Strap : The discovery and dumping of led to the development of Boot9Strap (B9S) Why You Need It (including the "KeyScrambler" algorithms)
It’s a tiny file (usually under 64KB) that takes up virtually no space on your SD card or PC. The Downsides
| Purpose | Requires boot9.bin? | Notes | |---------|--------------------|-------| | Installing boot9strap (initial hack) | No | Uses a chain of exploits to write boot9strap | | Reinstalling boot9strap after NAND corruption | Yes | boot9.bin is used to re-generate boot9strap | | Decrypting NAND backups (fat16 XORpad) | Yes | Required for certain old decryption methods | | Running 3DS system software emulation (Citra) | No | Citra does not require boot9.bin (it has a HLE implementation) | | Moving between hacked 3DS units | Yes | To clone or recover a NAND image |
The Last Boot9.bin