Sipeed made a microSD card image to boot Ubuntu on RISC-V based Allwinner D1 SoC. with their LicheeRV SoM.
Just download the archive, untar and follow the instruction in the README. There is an error, the primary partition should start at 80MB (163840), not 40MB (81920). The is limited to 4Go, so it should be grown with resize2fs to have more place to work.
The whole process so: Continue reading