# Where can I find the source code for the FPGA board? The [NDI Advanced SDK](https://ndi.video/for-developers/ndi-advanced/) contains the **VHDL** source that is available for the [NDI ](https://ndi.video/)codec cores. The low-level encode and decode functions are currently provided as an encrypted library. Source code for the FPGA examples can be found in the `fpga_reference_design` directory which includes the following content: | Filename | Contents | | --------------- | ----------------------------------------------------------- | | `README.md` | High level overview of the provided example projects | | `README.uSD.md` | Details on using the prebuilt uSD images | | `CHANGELOG.md` | List of notable changes | | `src/cpp` | Software source code and example projects | | `src/fpga` | Hardware design files and example projects | | `linux_kernel` | Projects to build kernel and boot loader | | `os_uSD` | Scripts to generate root filesystem and bootable uSD images | For more detailed information please see the [NDI FPGA Reference Design](/all/developing-with-ndi/advanced-sdk/ndi-advanced-sdk-fpga-example-designs-old/ndi-fpga-reference-design.md) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.ndi.video/all/faq/sdk/where-can-i-find-the-source-code-for-the-fpga-board.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.