Satellite c655-s5082 .fd file to .rom

Discussion in 'Toshiba' started by EvenNotOdd, Dec 18, 2018.

  1. EvenNotOdd

    EvenNotOdd Newbie

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  2. EvenNotOdd

    EvenNotOdd Newbie

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  3. EvenNotOdd

    EvenNotOdd Newbie

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    @t456 I saw you did this in another thread, can you be of any assistance here in the conversation process and potentially even the modding stage? Thanks!
     
    Last edited: Dec 20, 2018
  4. t456

    t456 1977-09-05, 12:56:00 UTC Moderator

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    Those .fd files were compressed/packed binaries, but both your files are plain roms already. You can edit them as-is or rename them to .rom first and then open them in MMTool or UEFITool. Both support non .rom extensions though, so there's not really much need for renaming them.

    They're bit-for-bit identical btw, so the second is just a copy.
     
  5. EvenNotOdd

    EvenNotOdd Newbie

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    Ok @t456. Do you know anyone who could help with the modding? Also how do I reflash the image once modded?
     
    Last edited: Dec 20, 2018
  6. t456

    t456 1977-09-05, 12:56:00 UTC Moderator

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    If you just want to unlock some hidden menus then you can diy; there's plenty of guides for that.

    Could do that for you, but there's always a risk of bricking the laptop and it's infitinitely preferable to do your own bricking. Don't mind about such things myself since I have soldering tools and an eeprom programmer, but without them it'd be a bit of a bind.

    Also, simply switching one of the unlocked items 'On' or 'Off' can also cause a non-booting system. Some entries may have been hidden to limit overclocking potential, but other options may have been disabled because they're simply not present on this particular model. Enabling that option then may or may not be a problem (PEG is a known troublemaker, for instance). Again the hardware tools would be very much welcome.

    Flashing the modded bios might be accomplished with the provided InsydeFlash tool, but it depends on how strict the security checks are. Do recall there's a method to hex-edit that tool's .sys file and make it force-flash, but only used that option once. The programmer is my only tool nowadays since that neatly bypasses all security methods.

    A possible alternative might be to extract the iso and then extract the TOSHBIOS.IMG file from there (7-Zip works for both types). This is the contents of the bootable DOS stick Toshiba provides and there's a DOS-based Insyde flash tool inside (flashit.exe). This has a few check override switches that can be used to skip most of the pre-flash checks (/MC). Can also use this tool to flash a custom boot image or new microcodes.
     
  7. EvenNotOdd

    EvenNotOdd Newbie

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    Thx for the guide and tips!
     
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