How do you convert Nintendo DS .SRL into decrypted .NDS?

By Hiccup, Oct 21, 2015 10,716 43 0

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  1. Hiccup

    OP Hiccup GBAtemp Advanced Fan
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    The .SRL is from Mario Kart DS (USA) (NDS) (Virtual Console), a Wii U software. Here is a patch to Mario Kart DS (USA), an NDS software.

    I tried ndstool on the ROM, and one of the things it tells me is:
    Code:
    0x6C    Secure area CRC                 0x3B22 (OK, mask ROM)
    does anybody now what a "mask" ROM is? and how to convert it into a decrypted ROM?

    Retrogamefan has contributed some info:
    Does anybody you know what the extra data is?
     
    Last edited by Hiccup, Feb 11, 2016
  2. Hiccup

    OP Hiccup GBAtemp Advanced Fan
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    Bump.
     
  3. Bug_Checker_

    Bug_Checker_ GBAtemp Advanced Fan
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    Have you tried dsi_srl_extract ?
     
    Last edited by Bug_Checker_, Nov 27, 2015
  4. Sliter

    Sliter GBAtemp Psycho!
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    hmm sorry I can't help, but whats the plan? o3o
     
  5. Hiccup

    OP Hiccup GBAtemp Advanced Fan
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    That converts the bins from the SD card.
    To convert it, then compare it with the USA cart version.
     
  6. Sliter

    Sliter GBAtemp Psycho!
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    hmm wlel interesting, I want to be what could be there ...

    Btw, is there a wayto mutplayer it with a DS or something?
     
  7. Hiccup

    OP Hiccup GBAtemp Advanced Fan
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    Lost my flashcard, so can't test it. If it is identical to the USA cart version, multiplayer would work.
     
  8. Sliter

    Sliter GBAtemp Psycho!
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    I mean in wiiu VC and DS ?
    also my 3DS is broken so I can't tets for you :/
     
  9. Hiccup

    OP Hiccup GBAtemp Advanced Fan
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    No. This is not about modifying the Wii U VC to support multiplayer, this is about converting the DS ROM files that are used in Wii U VCs, and converting them into the common decrypted format of NDS ROM files. There is a thread about VC emulator modding in one of the Wii U forums.
     
    CheatFreak47 likes this.
  10. Sliter

    Sliter GBAtemp Psycho!
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    I'm asking if the wiiU vc can have multplayer with an DS as it is XD but I think it not possible them :v
     
  11. Hiccup

    OP Hiccup GBAtemp Advanced Fan
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    Why do all my threads get hijacked?
     
  12. Hiccup

    OP Hiccup GBAtemp Advanced Fan
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    Last edited by Hiccup, Feb 2, 2016
    Sliter likes this.
  13. Gericom

    Gericom GBAtemp Maniac
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    IIRC you can use eNDryptS_Advanced_v1.2_NDS-iND to decrypt nds roms.
     
  14. VinsCool

    VinsCool Persona Secretiva Felineus
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    I used files from ds virtual console rom.zip renamed to .nds once extraced.

    Afaik those were just encrypted nds roms. It worked fine with no$gba and ds bios
     
  15. Apache Thunder

    Apache Thunder I have cameras in your head!
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    Yeah, last I checked NDS modcrypt is natively supported by the DS/DSi/3DS in DS mode. So you don't need to decrypt anything except whatever it is that contains the NDS rom.
     
  16. KazoWAR

    KazoWAR GBAtemp Advanced Maniac
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    .srl is just nintendo's offical file extension for nds roms, just rename it to .nds and try booting it in an emulator. i know i found download play roms in ds roms before with .slr extension and they boot in emulators just fine.
     
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  17. Hiccup

    OP Hiccup GBAtemp Advanced Fan
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    I tried ndstool on the ROM, and one of the things it tells me is:
    Code:
    0x6C    Secure area CRC                 0x3B22 (OK, mask ROM)
    does anybody now what a "mask" ROM is? and how to convert it into a decrypted ROM?
     
    Last edited by Hiccup, Feb 11, 2016
  18. Hiccup

    OP Hiccup GBAtemp Advanced Fan
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    Bump
     
  19. retrogamefan

    retrogamefan ***DSTT Coder*** ***AP Destroyer***
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    @Hiccup
    The header is identical between the retail .nds and the WiiU .srl
    There is extra data in the WiiU .srl from 0x1000-0x33FF, 0x3600-0x3FFF
    If you encrypt the .nds, the data from 0x4000-0x1FFFFFF is identical
     
  20. Hiccup

    OP Hiccup GBAtemp Advanced Fan
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    Do you know what the extra data is? And do you have any answers to the questions in this post?:
     
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