Milk-V Duo S?

[Andrew Cagney <andrew.cagney%gmail.com@localhost>]

Has anyone looked at https://milkv.io/duo-s which is slightly cheaper
than anything from beagle.  The chip is SG2000 and seems to be based
on the T-Head C906 RISC-V (and that core seems common).
For JTAG (which came up at BSDCan), there's this open question
https://community.milkv.io/t/jtag-pins-on-duo-s/2161 and the
discussion https://community.milkv.io/t/jtag-jtag-debug-guide-for-duo/1138
The latter thread points out that for DuoS's sibling Duo256M, uboot
re-configures the JTAG serial pins as GPIO (oops) so that needs to be
avoided.

Andrew