'Software Toolworks protection--Black Hol'
Author:Pete Rittwage (registered user: 558 posts )
Date: Sun, Mar 20th, 2011 @ 18:41 ( . )

To be more exact- the two sets of 3x00 bits in a row causes the framing to be lost and the bytes to be scrambled when read.

as recorded on disk:
6A 3D 5C D1 9F = 110101000111101010111001101000110011111

the bytes it wants (technically this may not be what it wants, this is what you put in to make checksum match - it's probably more derivative of the original pattern in reality, as 94 52 is still an illegal GCR sequence):
6A 65 AB 94 52 = 110101001100101101010111001010001010010

You can see we slip away on the first bad sequence and it is scrambled from there.


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Replies:
--* Software Toolworks protection--Black Hol
3/20/2011 @ 22:23--J Achernar
3/20/2011 @ 23:16----Lord Crass
3/21/2011 @ 08:23------Pete Rittwage
3/21/2011 @ 20:24--------J Achernar
3/21/2011 @ 21:26----------Pete Rittwage
3/23/2011 @ 04:45------------hyper active
3/26/2011 @ 22:55--------------J Achernar
3/27/2011 @ 13:45----------------Pete Rittwage
1/18/2013 @ 18:13------------------hyper active

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