[HELP] How to extract MHGEN arc files?

Discussion in '3DS - ROM Hacking, Translations and Utilities' started by ThatBenderGuy, Aug 23, 2016.

  1. ThatBenderGuy
    OP

    ThatBenderGuy GBAtemp Regular

    Member
    1
    Dec 16, 2013
    United States
    I have extracted the game's romfs files and taking a quick look noticed just about every file is in .arc format. Now I took a look at them with a hex editor and this is what I have come up with. Any ideas how to decompress these files? Maybe a QuickBMS script or something because I haven't seen anything on ARC files except for MH4U which I doubt is the same format as these files

    [​IMG]
     
  2. andibad

    andibad Soon™

    Member
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    Sep 14, 2009
    Indonesia
    hospital
  3. imthe666st

    imthe666st Felyne Hunter

    Member
    2
    Aug 16, 2015
    Germany
    ><HFB>
    Last edited by imthe666st, Aug 24, 2016 - Reason: Added link to the tools
  4. imthe666st

    imthe666st Felyne Hunter

    Member
    2
    Aug 16, 2015
    Germany
    ><HFB>
    I quickly wrote a program using my library to unpack a RomFS into ArcFS. It can't repack it into RomFS just yet, I'll add this later when I find some time.

    Source can be found on my Github: https://github.com/imthe666st/MHTools
    It's MHTools ( Library ) and TestApplication-ArcPacker ( Console Application )

    Simply put a folder called "RomFS" in the same directory as the application with all Arc files inside. ( RomFS folder not included ) and it will unpack everything into the ArcFS. ( a new folder called "ArcFS" will be created )
     

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