47 lines
2.3 KiB
Markdown
47 lines
2.3 KiB
Markdown
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# Filesystem
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The scripts in this folder are used to extract .app and .opt files.
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## Decryption
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There are two tools you can use to decrypt and extract updates.
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* [unsega_v0.1727.exe](./Unsega/unsega_v0.1727.exe): Fast but closed source.
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* [fsdecrypt.exe](./Fsdecrypt/fsdecrypt.exe): Slow but open source.
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Unsega is sourced directly from 1cc and should be totally safe but if you don't feel like running shady .exe's, you can build fsdecrypt from source instead.
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Both tools do exactly the same thing and work in a very similar way so use whatever you like.
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### .app decryption and extraction
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1) Drag and drop the .app file on [unsega_v0.1727.exe](./Unsega/unsega_v0.1727.exe) or [fsdecrypt.exe](./Fsdecrypt/fsdecrypt.exe)
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2) Mount the resulting .vhd(unsega) or .ntfs(fsdecrypt) file with [osfmount.exe](./Extra/osfmount.exe) (using default settings)
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3) Copy the internal_x.vhd partition from the vhd you just mounted.
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* If the extracted vhd is named **internal_0.vhd**, you can just double click it to open it.
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* If the extracted vhd is named **internal_X.vhd** where X is anything else than 0, you'll need to merge the file with it's base ! See [Merging incremental updates](#merging-incremental-updates)
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### .opt decryption and extraction
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You'll need to install the [ExFat7z](./Extra/ExFat7z/) 7zip plugin before proceeding. Install instructions are in the plugin's folder.
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You can find the original download page for the plugin [here](https://www.tc4shell.com/en/7zip/exfat7z/)
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1) Drag and drop the .opt file on [fsdecrypt.exe](./Fsdecrypt/fsdecrypt.exe) or [unsega_v0.1727.exe](./Unsega/unsega_v0.1727.exe)
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2) Extract the resulting .vhd(unsega) or .exfat(fsdecrypt) file with 7zip.
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## Merging incremental updates
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Sega updates are incremental, you'll need to merge them if you want to open the latest versions.
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Here's an example on how to do so :
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```powershell
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Set-VHD -Path "internal_3.vhd" -ParentPath "internal_2.vhd"
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Set-VHD -Path "internal_2.vhd" -ParentPath "internal_1.vhd"
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Set-VHD -Path "internal_1.vhd" -ParentPath "internal_0.vhd"
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Merge-VHD -Path "internal_3.vhd" -DestinationPath "internal_2.vhd"
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Merge-VHD -Path "internal_2.vhd" -DestinationPath "internal_1.vhd"
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Merge-VHD -Path "internal_1.vhd" -DestinationPath "internal_0.vhd"
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```
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You'll need Hyper-V to be enabled for these commands to work.
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You'll also need administrator privileges!
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