Boot9.bin File

Because the code is burned into the hardware, any vulnerability found in it is permanent . Nintendo cannot "patch" boot9.bin with a software update.

The 3DS, like modern computing devices, uses a chain of trust. At the very beginning of this chain is a small, mask-ROM programmed chip inside the CPU (the SoC). This ROM cannot be modified after manufacturing. Its job is to load, validate, and execute the next stage. boot9.bin file