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You probably want the reference manual for the co-processor.

Thanks. It is a little confusing because the board has ARM A9 and RISC.

There should be an Epiphany manual with details on what sort of different processors are on the board or SoC. Separate ARM architecture and related manuals should be available from arm.com

Thanks. I also found this too: http://www.shervinemami.info/armAssembly.html

I am not sure what your goals are but I would suggest first skimming through the documents on https://www.parallella.org/board/ . e.g. within the first few pages of "Parallella Reference Manual" there is a picture that shows all the parts which might have alleviated the "ARM A9" vs RISC confusion.

I am doing mostly C++ algo trading work right now. So I thought I would try and speed some things up and also write my own network stack.

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