Dell bios, how to decompose / mod.

Discussion in 'BIOS Mods' started by wolf69, Nov 21, 2009.

  1. wolf69

    wolf69 MDL Senior Member

    Jul 29, 2009
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    I did i test mod for a dell xps 400 by inserting the m09 slic 2.1 into the bios and tried flashing and it worked i dont now if maybe it was glitch or not.
     
  2. shakeyplace

    shakeyplace MDL Addicted

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    #2 shakeyplace, Nov 21, 2009
    Last edited: Nov 21, 2009
    Well, I have always thought it was possible. I expected that the 5 byte header would have to be built (we can do that, the index byte may have to be experimented with, but the 4 length bytes we could definetely do) there is the issue whether it matters if the index byte precedes or should be behind the length bytes or if there is a way we could determine which would be best and I am unsure of the first byte of the actual module, I think there is an extra byte added to the start of the module, most of the modules start with either 00 or 40 (slic modules anyways), I suspect that indicates the module type ie, to indicate a hole.rom...But this is just speculation... Do you have a link to the bios you flashed? I would be very interested in looking at it...
    Also, does it activate? does slic show in the slic dump toolkit?
     
  3. wolf69

    wolf69 MDL Senior Member

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    #3 wolf69, Nov 21, 2009
    Last edited: Nov 21, 2009
    (OP)
    I dont know if it activates or not but it does show slic in the dump toolkit it has xp right now and i have the modded rom file i just modded it after i ran it and stopped it so i could get the files from the temp directory. Here is the modded rom file

    http://www.box.net/shared/ahpyth0jne
     
  4. shakeyplace

    shakeyplace MDL Addicted

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    WOW, I like that, simple, just replace 374 bytes after the ACPI module with a slic module!
     
  5. wolf69

    wolf69 MDL Senior Member

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    Yeah i seen that there was alot of ff's so i just figured that that was data not written onto yet. Dont want to post anywhere till maybe we get more successful installs with it. now if i can only make a install executable
     
  6. shakeyplace

    shakeyplace MDL Addicted

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    You mean to install the bios, np, we can rebuild the executable easily..
    Andyp can even incorporate in his new phoenix tool, I am sure. Do you want me to build the exe?
     
  7. wolf69

    wolf69 MDL Senior Member

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    Sure and have andy look at it and see what he thinks i dont want to be responsible for bricked boards or anything
     
  8. wolf69

    wolf69 MDL Senior Member

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    this is off topic but i was wondering if you could see what slic is in my bios before i did the modification, it keeps saying it has 2.0 in the fc module but i cant extract it and winhex dont show anything about slic id appriacate it


    http://www.box.net/shared/in0ehsi8au
     
  9. shakeyplace

    shakeyplace MDL Addicted

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    #9 shakeyplace, Nov 21, 2009
    Last edited: Nov 22, 2009
    wolf69, I have a couple question, how did you flash your PC with the new bios? Did you use that actual file, it is 16 bytes too short????
    anyways, here is a rebuilt executable, with the 16 bytes missed. Do you want to check that out, see what you think?


    here is the rom file I based it on...
     
  10. shakeyplace

    shakeyplace MDL Addicted

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    looks like an Asus bios with a NEC slic 2.0
     
  11. wolf69

    wolf69 MDL Senior Member

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    I used the phoenix dos flasher it actually worked not sure how and i must have uploaded the wrong file i did 2 of them and i believe i removed alittle too much on that one after i get done eating supper ill find the one i used and upload that one. As for the asus bios thats weird that it has a nec 2.0 slic its the actual bios from their site
     
  12. shakeyplace

    shakeyplace MDL Addicted

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    well, the file I uploaded should be right then, I'll post this in the Dell thread once you upload the proper file for me to double-check...
     
  13. wolf69

    wolf69 MDL Senior Member

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    ok im looking for it now sorry for the mistake
     
  14. takasuite

    takasuite MDL Senior Member

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    Hm, i have something to learn here :)
     
  15. wolf69

    wolf69 MDL Senior Member

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    Ok sorry here is the correct one verified and is the same size as the original


    http://www.box.net/shared/409retrol1
     
  16. shakeyplace

    shakeyplace MDL Addicted

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    ok, that was slightly different than the one I built, I'll redo that..
     
  17. shakeyplace

    shakeyplace MDL Addicted

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    Here is the proper Dell rebuilt file then, the first one you had 3 "FF"s before the slic, the second did not, the second was the right length...

    http://www.box.net/shared/h1svahx78j
     
  18. wolf69

    wolf69 MDL Senior Member

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    Yeah the last one was a screw up and i forgot to delete it lol ive got too much crap on my pc right now mainly movies that my wife wants lol
    have andy take a look at it and see what he thinks i just dont want alot of people to get bricked boards but from what i seen i didnt touch the boot block
     
  19. takasuite

    takasuite MDL Senior Member

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    How is about the strings after "RSDT" string which are not match with slic 2.1. Waiting for Wolf69 to install W7.
     
  20. wolf69

    wolf69 MDL Senior Member

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    Installed windows 7 but it didnt activate used the slic dump 2.3 and the rsdt table didnt match sorry for the waste of time