I assume that you can put this on a FPGA, as Chris Tyler talked about on
Tuesday.  I haven't checked this.  I think that it is in verilog, but I'm
not sure.
<https://github.com/westerndigitalcorporation/swerv_eh1>

There's also an emulator:
<https://github.com/westerndigitalcorporation/swerv-ISS>

I have no idea if there is MMU support in the core (needed for reasonable
Linux).

- https://justanotherelectronicsblog.com/?p=470

- https://www.cnx-software.com/2018/09/04/licheetang-anlogic-eg4s20-fpga-board-targets-risc-v-development/

I think it's the Liche Tang that Chris was referencing when he mentioned a "$17 board".  AliExpress sells it for $31 CAD; I'm not sure where to get it for $17, and that might be $17 USD.

The justanotherelectronicsblog.com link has considerable useful detail for the likes of us, pointing to Verilog code repos, development tools, and quite a bit of other relevant stuff should one spend $17/$31 and want to play with it.

The one thing it seems to be missing that I wish it had was Ethernet.  I imagine that could be a Bit of Verilog Away, though that somehow feels like an oversimplification.  (Opencores.org has a whole bunch of Ethernet implementations!  Thanks for the pointer, Kevin!)

There's a bit of a world of "and now what to do about a distribution?" after that; that would be absolutely on point here.  The notion of a little RISC-V chip running a Linux from Scratch using S6 and MUSL seems interesting as a substrate to run more stuff on...