Help extracting BIOS ROM file from Samsung AMI BIOS executable

Discussion in 'BIOS Mods' started by hdast782r3, Sep 4, 2014.

  1. hdast782r3

    hdast782r3 MDL Novice

    Sep 4, 2014
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    I have Samsung Ativ 4.
    I updated my bios from P01RBG to P08RBG. Unfortunately after update my SSD can't reach SATA3 speeds. It is limited to SATA2, regardless of BIOS settings.

    I want to downgrade my bios.

    I found version P06RBG, but I can't unpack it. Could you help me?
    ht tp://sbuservice.samsungmobile.com/upload/BIOSUpdateItem/ITEM_20131213_21284_WIN_P06RBG.exe
     
  2. nexus76

    nexus76 MDL Addicted

    Jan 25, 2009
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  3. hdast782r3

    hdast782r3 MDL Novice

    Sep 4, 2014
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    #3 hdast782r3, Sep 5, 2014
    Last edited by a moderator: Apr 20, 2017
    (OP)
    Thank you.

    I opened cmd as admin and tried to update bios.

    Unfortunately i got an error. I looked for it in google, but i am still unsure how to make it working.

    I think this error is because there is not proper capsule in the rom. Should i unpack bios without removing capsule or just use different method of updating?

    Code:
    C:\P06RBGbios>afuwinx64 bios.rom /p /b /n /e /r /x
    +---------------------------------------------------------------------------+
    |                 AMI Firmware Update Utility  v3.04.01                     |
    |      Copyright (C)2012 American Megatrends Inc. All Rights Reserved.      |
    +---------------------------------------------------------------------------+
     Reading flash ............... done
     - FFS checksums ......... ok
     Loading capsule to secure memory buffer ... done
    18 - Error: Unable to start a Secure Flash session.
    
    
    C:\P06RBGbios>
     
  4. nexus76

    nexus76 MDL Addicted

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    #4 nexus76, Sep 5, 2014
    Last edited by a moderator: Apr 20, 2017
    for the downgrade process you mentioned above just use the unmodified capsule (.cap) rom to start a secure flash session.
    but do yourself a favor and use

    afuwinx64 P06RBG.CAP /p
    « programm flag only

    so you won't loose your smbios data!!
     
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  5. hdast782r3

    hdast782r3 MDL Novice

    Sep 4, 2014
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    #5 hdast782r3, Sep 6, 2014
    Last edited by a moderator: Apr 20, 2017
    (OP)
    The previous command was from ht tp://forum.notebookreview.com/samsung/696197-samsung-laptops-roll-back-bios-updates.html

    ---

    Still no success. The same error:

    Code:
    C:\P06RBGbios>afuwinx64 P06RBG.CAP /p
    +---------------------------------------------------------------------------+
    |                 AMI Firmware Update Utility  v3.04.01                     |
    |      Copyright (C)2012 American Megatrends Inc. All Rights Reserved.      |
    +---------------------------------------------------------------------------+
     Reading flash ............... done
     Secure Flash enabled, recalculate ROM size with signature...
     - FFS checksums ......... ok
     Loading capsule to secure memory buffer ... done
    18 - Error: Unable to start a Secure Flash session.
    
    
    C:\P06RBGbios>