InsydeH2O BIOS - how to change vendor ID?

Discussion in 'Windows 7' started by evgbog, Aug 18, 2009.

  1. evgbog

    evgbog MDL Novice

    Aug 15, 2009
    I have a problem with Acer Asipre One 531 (ZG8_3113.fd BIOS file). I cannot activate Win7 Enterprise with KMS server due to wrong SLIC table.

    SLIC Dump ToolKit Reports SLIC format error, RSDT shows "ACER ACER" and this doesn't match PubKey/Marker section.

    I also tried to remove SLIC from bios (removed 2 GUIDs in Insyde tool) bit still no luck - SLIC table still exists (but empty).

    What I need to change to pass SLIC data validation test in SLIC Dump ToolKit? How to change this "ACER ACER" RSDT field?

    I've decompressed and disasemmbled bios and found only 1 occurence of "ACER".

    seg000:00103850 sub_103850 proc near ; CODE XREF: sub_102774+2Bp
    seg000:00103850 ; sub_102774+210p
    seg000:00103850 arg_0 = dword ptr 4
    seg000:00103850 arg_10 = dword ptr 14h
    seg000:00103850 mov eax, [esp+arg_10]
    seg000:00103854 mov cl, [eax]
    seg000:00103856 test cl, cl
    seg000:00103858 mov byte ptr [eax], 0
    seg000:0010385B jnz short loc_10388A
    seg000:0010385D mov eax, [esp+arg_0]
    seg000:00103861 mov eax, [eax]
    seg000:00103863 cmp dword ptr [eax], 53434146h
    seg000:00103869 jz short loc_10388A
    seg000:0010386B mov ecx, 52454341h ; <-- this is "ACER"
    seg000:00103870 mov [eax+0Ah], ecx
    seg000:00103873 mov word ptr [eax+0Eh], 2020h
    seg000:00103879 mov [eax+10h], ecx
    seg000:0010387C mov dword ptr [eax+14h], 20202020h
    seg000:00103883 mov dword ptr [eax+1Ch], 35323031h
    seg000:0010388A loc_10388A: ; CODE XREF: sub_103850+Bj
    seg000:0010388A ; sub_103850+19j
    seg000:0010388A xor eax, eax
    seg000:0010388C retn
    seg000:0010388C sub_103850 endp
  2. evgbog

    evgbog MDL Novice

    Aug 15, 2009
    #2 evgbog, Aug 18, 2009
    Last edited by a moderator: May 23, 2017
    Here it is information that OEM ID cannot be changed in Insyde BIOS. But there is no explanations, why.

    Please, give any cooment on this.

    I think code above is exact place where OEM ID is sets. You can see that "ACER" is placed twice, with spaces (2020h) between.
  3. borg239

    borg239 MDL Novice

    Feb 6, 2010

    what utility did you use to dump the bios?
    and how are you editing it?