Yifan Lu has released a set of tools for loading code on 9.x 3DS consoles, here is a quote from the source:
Here is a collection of scripts and tools used for loading code on 9.x 3DS. Check out my posts to see how all this works. Please note this is only for developers and 3DS researchers and there is nothing here for the end user. This is NOT a CFW or any kind of ROM loader.
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