How to properly compress OEMBIOS files

Discussion in 'Windows XP / Older OS' started by crypto, Sep 16, 2009.

  1. crypto

    crypto MDL Member

    Nov 3, 2008
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    #1 crypto, Sep 16, 2009
    Last edited by a moderator: Apr 20, 2017

    Attached Files:

  2. reginakampher

    reginakampher MDL Addicted

    Apr 5, 2008
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    Thank you. It works great.
     
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  3. gayanll

    gayanll MDL Novice

    May 25, 2012
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    thnak you very much.. :)
     
  4. Gelip

    Gelip MDL Novice

    Feb 28, 2011
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    #4 Gelip, Mar 12, 2013
    Last edited: Mar 12, 2013
    What's happens !!! CRC-32 checksum compressed file not the same has oryginal !!!!

    1. Copy from ISO to folder an Desktop OEMBIOS.CA_ - CRC32 is 9d973c52
    2. Extracted this file with WinRAR or expand oembios.ca_ -r (extracted file is oembios.cat)
    3. Deleted oryginal OEMBIOS.CA_
    4. Making CAB: makecab /d compressiontype=lzx /d compressionmemory=21 oembios.cat
    5. CRC32 checksum is dfb6d055 at laptop and 2759b1c5 on the desktop pc - not the same that oryginal !!!????:mad::mad:

    What is wrong? I test this in 3 PC (Laptop, Desktop and MS VirtualPC). After makecab wrong CRC32. I try make CAB several times and only one per several attempts working good and CRC32 is the same what oryginal. In hex editor files 4 byte difference in offset 36

    What does it depend?

    In this post similar problem:

    P.S. Of course uncompressed oembios.cat has OK CRC32 for OEMBIOS preactivation
     
  5. Gelip

    Gelip MDL Novice

    Feb 28, 2011
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    #5 Gelip, Mar 12, 2013
    Last edited by a moderator: Apr 20, 2017