* <https://codeconstruct.com.au/docs/microwatt-orangecrab/>
* <https://shenki.github.io/boot-linux-on-microwatt/>
+* <https://github.com/gregdavill/OrangeCrab-test-sw>
prerequisite tools:
notes for how to compile for ulx3s
+ git clone https://github.com/kost/fujprog
+ (follow build procedure shown in fujprog README)
git clone https://git.libre-soc.org/git/microwatt.git
git checkout -b verilator_trace
export FPGA_TARGET=ulx3s
make microwatt.svf
+ fujprog microwatt.svf
+
# Notes for nextpnr-xilinx