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 byaml.py: command line python tool to convert .byaml to .xml

Thread starter tesnos6921
Start date Aug 27, 2017
Views 6,490
Replies 24
Likes 8

Mat37

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Level 8

Jan 4, 2018

maorninja said:
Is there a way to convert XML back to BYAML?

Yes just use yamlconv

NightScript

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Level 10

Jan 5, 2018

Mat37 said:
Yes just use yamlconv

That doesn't work for Little Endian BYAMLs.

Mat37

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Level 8

Jan 5, 2018

maorninja said:
That doesn't work for Little Endian BYAMLs.

I just tested for MK8 BYAML, not DX, sorry bro

NightScript

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Level 10

Jan 5, 2018

Mat37 said:
I just tested for MK8 BYAML, not DX, sorry bro

Its fine. The game I want to do anyways is Super Mario Maker 3DS

Nexcus

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Level 3

May 21, 2018

How to convert .xlm to byaml for Little Endian BYAMLs? please
yamlconv doesn't work for me!

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Hacking byaml.py: command line python tool to convert .byaml to .xml

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