Hello guys, this is my first post here! I just got a MIG Switch card out of curiosity and I was tinkering with it. For those who don't know, it's used by placing XCI dumps as well as other game specific bin files in the sd card of the MIG Switch, and are obtained from the original cartridge by using an app like nxdumptool. Two of these bin files are mandatory to get the game to boot: Initial Data.bin and Certificate.bin. They stay the same for every cartridge of a specific game. Now, if you want to use an XCI dump from a shady website it's impossible to get it to work without those files. By using the Certificate.bin from another game it has no problem, but this does not count for the Initial Data.bin. So I looked for a way to obtain this Initial Data from an XCI file and read a bit of the XCI file documentation from switchbrew dot org. Here's what I understood so far: The Switch checks if the cartridge is valid by doing a challenge–response authentication on the Initial Data. The Package ID is contained both on the XCI and the Initial Data, on positions 0x110 and 0x0 respectively. The Initial Data hash is on the XCI at position 0x160. It is calculated by doing a SHA-256 hash on the full Initial Data content. So I was wondering, is there a way to to construct a functional Initial Data file starting from an XCI dump? I also tried a reverse approach by editing the Package ID in the Initial Data from another game, generating the Initial Data hash and putting it in the XCI file but is not enough to get the Switch believe it's a real game. Sorry if this may seem stupid but let me know what you think.

duckstation for Switch

catlover007 · 2024-04-22T04:06:40+00:00

duckstation is an excellent Playstation 1 emulator by Stenzek. It has a very good compabiility and it is quite performant. It also supports all kinds of enhancements such as high resolution rendering and PGXP which can lessen the "wobble" and...

Hacking Question Updated Emunand with no exfat

Thread starter betterthanjordan
Start date Jun 23, 2019
Views 2,474
Replies 4

betterthanjordan

Member

Newcomer

Level 5

Jun 23, 2019

Hi guys,

I very stupidly updated my SX OS emunand with the wrong firmware (used the non exfat when my original was exfat). Anyways now my emunand won't load now and I've a lot of games and saves there. Do I call it quits and start again or is there a way to recover the emunand?

Carlos_DobleC

Well-Known Member

Member

Level 8

Jun 23, 2019

Copy out, format to fat32, copy in? Maybe?

betterthanjordan

Member

Newcomer

Level 5

Jun 23, 2019

Carlos_DobleC said:
Copy out, format to fat32, copy in? Maybe?

OK so I have started to extract my hidden NAND using DD and this will take a few hours. How do I configure the SD card? Just format the full card as fat 32 and that is it?

JBMario

Well-Known Member

Newcomer

Level 5

Jun 23, 2019

Format the SD card to FAT32. Put SX OS's boot.dat file on it and the firmware. Put the SD card in your Switch, boot the Switch, launch ChoiDujourX, choose ExFAT this time, update. Then you can use your ExFAT SD card normally.

betterthanjordan

Member

Newcomer

Level 5

Jul 4, 2019

Ok i have been trying to get this to work but no joy. I think I need to split my rawnand.bin file into the 4GB splits for fat32. Anyone know how to do this?