maelstrom2001, the difference between encrypted and decrypted is not the problem.
I changed one byte in my firmware (decrypted) at address 0xCB1A from 0x88 to 0x89.
The patch of both the encrypted and decrypted comparison is:
# Automatically generated content #
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CB1A: 13
My question is, what calculation is made to get the '13'?
I have tried xor, but that doesn't work.