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Originally Posted by RealShakaZulu
Are you sure? I took "navboot" and checked the last 3 bytes (2D 4F A4) of the file. I then truncated those bytes and ran a CRC24 hex outputed checksum (java -jar jacksum.jar -E hexup -a crc24 navboot)... which returned 82 3B F4.
Am I doing it wrong?
PS I tried both (1) generating checksums of the whole file and (2) per Roscoe reducing the file to a single section defined by 4D AD 00 02 less the last 3 bytes both with and without the "4D AD 00 02" header... it still produces a checksum value that is different than the one in the last 3 bytes of the file/section.
-RSZ
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u must truncate 4 bytes and than calculate checksum
download program that calculates checksum for os 9000 files "crc24.exe" from yahoo "hacktheibus" group and see how program calculates checksum - there is source of program in "delphi"