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.

mig switch not working/updating??

stickybit · 2024-03-28T19:59:51+00:00

just got my mig switch and followed instructions to the T to update it and all im getting is a red light and then a message saying cart not recognised, all im trying to do is update it to the latest firmware, it says it should flash blue when...

If I install CFW on my switch and it already has legit games in it, what happens to them and their saves?

Thread starter EternalStar91
Start date Nov 18, 2023
Views 1,361
Replies 2

EternalStar91

New Member

Newbie

Level 1

Nov 18, 2023

Probably a very stupid question, but i want to install CFW on my switch and keep the installed games and their saves intact.

Dust2dust

Well-Known Member

Member

Level 14

Nov 18, 2023

Assuming you create an emuNAND, they would just come pre-installed on your emuNAND. If they are online games that you actively use, you would keep using them on sysNAND normally, but the emuNAND versions would be for offline use. emuNAND is for CFW unlegit stuff, and should be set to not connect to Nintendo's servers.

Reactions: zamastyle

zamastyle

Well-Known Member

Member

Level 3

Nov 18, 2023

As long as you follow a good guide like the rentry guide, you wont touch your stock firmware. It will stay exactly as it is. You will use a clone of that OS called emummc that gets copied onto your sd card for all your mod activities offline, and your stock firmware will be used for your legit online activities. As dust2dust mentioned, since emummc is a clone, everything on your stock firmware when you make the clone will be on your emummc.

Reactions: Dust2dust