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FPGAs are your thing? You have an IceStick, an IceBreaker or a ULX3S lying around unused? And with unused we also mean the BlinkenLights example. And you always wanted to design and implement your very own RISC-V CPU?

Then the following could be very interesting for you.

Bruno Levy is the Director of Inria Nancy Grand Est Research Center and published a complete RISC-V Guide on github just 2 weeks ago. 

Honestly, a little prior knowledge of digital design as well as how to use Verilog is helpful. And the tutorial doesn't take you completely by the hand. But if you've ever wanted to build your own processor in the form of a RISC-V architecture, this is a near-perfect starting point.

The result of the tutorial is a Mandelbrot renderer, but once you get there, the real fun only begins.