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Old 10-16-2012, 02:02 PM   #698
ixtab
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Posts: 2,903
Karma: 6677559
Join Date: Dec 2011
Device: K3, K4, K5, KPW, KPW2
Quote:
Originally Posted by geekmaster View Post
I just patched the serial and pcbsn in my custom u-boot binary, replacing some of my hex characters with ascii zeroes. It does not boot. They must contain a check-digit or something. And of course it WROTE the idme vars, so it is bricked until I patch some real values in my u-boot and let if write those to mmc...

Fun, huh? Anyway, it works right when you patch in REAL serial and pcbsn (even if from a different kindle).
I don't think that you can just "binary-patch" u-boot images, I think there's a CRC32 (or whatever other) checksum or something... I vaguely remember that I had to recompile u-boot images if I even wanted to change a single character in a path. I may be wrong though.
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