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...

Tutorial Updated

Dump Vertex and Fragment Shader code from Nintendo Switch Games

Okay, I don't understand why there's no tutorial about this. I am really thanked to @KillzXGaming and @gdkchan for helping me with this issue and of course, for making this possible.

Not all shaders work, but for most of them, you can get the code in a few steps.

What do you need?

- Ryujinx.ShaderTools: Download link (You can easily compile Ryujinx yourself too: https://github.com/Ryujinx/Ryujinx)
- Switch Toolbox (method 1): https://github.com/KillzXGaming/Switch-Toolbox
- HxD or your favourite hex editor (method 2): https://mh-nexus.de/en/hxd/
- Text Editor like Sublime Text: https://www.sublimetext.com/
- Decrypted switch games (RomFS format)

Step 1: Prepare your game

- Get the desired game (In this case Pokémon Let's Go Pikachu)
- Decrypt the game with your favourite method.
I recommend taking a look to these tutorials if you don't know how to do it: https://gbatemp.net/threads/decrypt...backup-loading-ryujinx-yuzu-in-1-click.506954 or https://gbatemp.net/threads/extract-nsp-nca-xci-update-all-in-one-tool-for-layeredfs.511156/

Step 2: Method 1 - Switch Toolbox

- Download Switch Toolbox from github and place it anywhere in your computer (you may have to install some packages. For more info, take a look to the github release info).
- Open Switch Toolbox. Click on File > Open.
- The files with extension .bnsh are shaders, so look for the .bnsh you wanna see the code and open it.
It's okay if the shader is called "name.bnsh_fsh" or "name.bnsh_vsh". "fsh" stands for Fragment Shader and "vsh" stands for Vertex Shader.
- Open the visual folder structure by clicking on the "+" until you can see the Vertex Shader or Fragment Shader folder (after Shader Variation).

- Right click on the last one > Export Shader1.bin > save it anywhere in your computer. The name doesn't matter but it is recommended to save this file in ShaderTools folder (See step 3). Sometimes it's not shader1 but shader0, if one gives you error, try the other.

Step 2: Method 2 - HxD and manual file editing

- Open the .bnsh file with the hex editor (HxD in this case).
- All the shaders start with the hex values 78 56 34 12. Look for them.

- Count 0x30 bytes from that point.The shader code starts from there.

- Copy the data from there to the all zeros (can be the end of the file) to other new hex file.
- Save it as .bin. The name doesn't matter but it is recommended to save this file in ShaderTools folder (See step 3).

Step 3: See the code

- Go to the folder where you have the Ryujinx.ShaderTools.
- Open the cmd window with Windows + R > cmd or Shift + Right Click > Open CMD Prompt here.
- In the cmd window use the command:

(For FragmentShader) Ryujinx.ShaderTools f path/to/shader1.bin/relative/to/Ryujinx.ShaderTools folder.
(For VertexShader) Ryujinx.ShaderTools v path/to/shader1.bin/relative/to/Ryujinx.ShaderTools folder.

e.g, if the binary is in the Ryujinx Shader Tools folder:

Ryujinx.ShaderTools f fragmentShader.bin
Ryujinx.ShaderTools v vertexShader.bin

- if everything went well, the cmd window will display the code and you can copy it to your favourite text editor.
-Enjoy

Is there anything missing?

Leave a comment to know what I missed so we can help others too ^^

Credits:

- @KillzXGaming: Switch Toolbox
- @gdkchan: Ryujinx and huge help
- @PRAGMA: Romfs decrypting tutorial
- @huma_dawii: Other decrypting tutorial