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#70 Doc. CMOS.IMG format

applied_to_svn
closed
User docs (43)
5
2017-03-04
2012-04-10
Czerno Bill
No

Please update user doc with cmos inage file format !

Please quick-reply here, too - is a binary file, 128 bytes long, what Bochs expects for this image ?

Discussion

  • Czerno Bill

    Czerno Bill - 2012-04-11

    Not apparently. I can find Boch's CMOS layout there under $ 2.7,
    what I'm looking for however is the expected format for an alternate
    CMOSIMAGE file.

     
  • Czerno Bill

    Czerno Bill - 2012-04-11

    I want to use a non-bochs BIOS, this is the reason I need to provide the emulator with my own version of CMOS contents. OK, I have been bold and gave it a CMOSIMAGE as 64-bytes binary
    file. Looks like it worked (the simulation broke during POST because of the foreign BIOS but I see the date etc.were updated inside the cmos file).

    Still, one line or 2 could be added to the documentation for accuracy sake.

    Regards

     
  • Czerno Bill

    Czerno Bill - 2012-04-11

    correction: 128 bytes, not 64.

     
  • Volker Ruppert

    Volker Ruppert - 2017-03-04
    • status: open --> closed
    • assigned_to: Volker Ruppert
    • Group: --> maybe_some_day
     
  • Volker Ruppert

    Volker Ruppert - 2017-03-04

    I have now clarified in the docs that "cmosimage" expects a binary file with size 128 bytes. That's all Bochs needs to load it. Everything else depends on the BIOS image used. For BIOS-bochs-latest the layout can be found in the developer doc. For an external BIOS image it might be required to run it's setup and load the default values.

     
  • Volker Ruppert

    Volker Ruppert - 2017-03-04
    • Group: maybe_some_day --> applied_to_svn
     

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