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...

ROM Hack Question is there any dedicated tool to extract FE3H?

Thread starter phaie
Start date Jul 29, 2019
Views 3,965
Replies 3

phaie

Member

Newcomer

Level 2

Jul 29, 2019

I wanna see all of the support conversation.

masagrator

The patches guy

Developer

Level 22

Jul 29, 2019

From what I know - no. File in ~83% is composed with zlib chunk files (mostly textures). Rest of them looks like uncompressed files or some other type of data.
It's not encrypted, that's for sure. But composition is weird.
Try to find in this big file text or uncompress chunks with offzip and try to find text in uncompressed chunks.

Aisuga

Active Member

Newcomer

Level 5

Jul 29, 2019

The arslan quick bms script can extract fe:3h as it's the usual musou file structure. You just have to rename DATA0.bin/DATA1.bin to LINKDATA.IDX/LINKDATA.BIN. But be warned that there's no name table so it will be very difficult to figure out what file is what.
https://zenhax.com/viewtopic.php?t=2191

Reactions: masagrator

Lovivos

Member

Newcomer

Level 1

Jul 29, 2019

Apparently you can unlock all the support conversations by editing your system savefile with a hex editor, thats all I know since the person who did it can't reveal it yet since they have a deal with a YouTuber that won't allow him to reveal it