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

[Hiccup]

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:

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:

@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

Does anybody you know what the extra data is?

 

[Hiccup]

Bump.

 

[Bug_Checker_]

The .SRL is from Mario Kart DS (USA) (NDS) (Virtual Console), a Wii U game.
Thanks

Have you tried dsi_srl_extract ?

 

[Sliter]

hmm sorry I can't help, but whats the plan? o3o

 

[Hiccup]

Have you tried dsi_srl_extract ?

That converts the bins from the SD card.

hmm sorry I can't help, but whats the plan? o3o

To convert it, then compare it with the USA cart version.

 

[Sliter]

That converts the bins from the SD card.

To convert it, then compare it with the USA cart version.

hmm wlel interesting, I want to be what could be there ...

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

 

[Hiccup]

Lost my flashcard, so can't test it. If it is identical to the USA cart version, multiplayer would work.

 

[Sliter]

I mean in wiiu VC and DS ?
also my 3DS is broken so I can't tets for you :/

 

[Hiccup]

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.

 

[Sliter]

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.

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

 

[Hiccup]

Why do all my threads get hijacked?

 

[Hiccup]

Bump

xdelta patch to MKDS (USA): https://drive.google.com/file/d/0B_yBl-184usmUFRaLWt3d1czTm8/view?usp=sharing

 

[Gericom]

IIRC you can use eNDryptS_Advanced_v1.2_NDS-iND to decrypt nds roms.

 

[VinsCool]

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

 

[Apache Thunder]

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.

 

[KazoWAR]

.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.

 

[Hiccup]

I tried ndstool on the ROM, and one of the things it tells me is:

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?

 

[Hiccup]

Bump

 

[retrogamefan]

@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

 

[Hiccup]

@retrogamefan
Do you know what the extra data is? And do you have any answers to the questions in this post?:

[...]
does anybody now what a "mask" ROM is? and how to convert it into a decrypted ROM?