Found 2 comments on HN
duskwuff · 2017-08-25 · Original thread
Not an online course, but my go-to recommendation is "FPGA Prototyping by Verilog Examples" [1]. Or, if you want to learn VHDL, [2].



sabot · 2015-01-02 · Original thread
It's half of your question, but a good basic electronic logic simulator is

A digital electronics book could be paired with it for exercises. Or heck build your own microcontroller or something.

A similar method is to instead of using a game to simulate circuits in software, use an FPGA to simulate a circuit in hardware. A cool book I've used to here,

It will take you step by step from creating simple shift registers to displaying an image over VGA (which you implement yourself).

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