| The AESKEY0-3 registers are readable. This allows inspection of the normal-key when writing arbitrary keyX/keyY pairs. From there it is trivial to deduce the keyscrambler function. This attack does not work for the 3DS keyscrambler because keyslots 0-3 are only for TWL keys.
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| After using the key generator to generate the normal-key, you could overwrite parts of the normal-key with your own data and then bruteforce the remaining keyscrambler output. From the normal-key outputs, you could deduce the TWL keyscrambler function.
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This attack does not work for the 3DS keyscrambler because keyslots 0-3 are only for TWL keys.