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32 bytes added ,  23:46, 26 July 2017
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==== Downgrade check ====
The bootloader will check if someone attempted to downgrade it. A fuse array will be checked, if too many fuses are burnt the bootloader will detect a downgrade attempt. If too little are set, the bootloader will program the expected bitmap and force a reset. The fuse array and the expected number of burnt fuses is different on unit type 0 (non-retail) and unit type 1 (retail).
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* It clears the stack
* It disables(?) and clears the security engine
* It sets a disables fuse (so that Nintendo knows that you attempted to mess with the bootloader)programming
* It clears the key area
* It clears the data for stage 2
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