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.

New Hard Mod (WIP)

18minimus18

New Member

Newbie

May 11, 2022

Hi there

I'm working on making a new style hard mod for the switch, the one I'm working on is an unpatched v1 switch (XAJ70001)

right this moment I'm working on reverse-engineering the module, I'm hoping to have this as open-source but we will see

anyway need help working on the schematic I have this so far in Altium designer but I know there are 4 caps that I don't know the values for or where they go on the emmc. was hoping for a fast track if anyone knows them and what line they connect to pin 5 I'm not sure where that is connected but the rest is working other than the placement of the 4 caps it's nearly done

the idea is to get this printed and shipped back to me and see if I can copy my nand over to this new design if successful then I can work on adding mod chip functionality to this as hopefully a semi plug and play module