aarch32 -- Beaglebone Black (BBB) and Allwinner H3 boards (Orange Pi), Zynq aarch64 -- NanoPi Fire3, Allwinner H5 (Orange Pi)
If you are just curious about Kyu, take a look at the "sampler".
If you have a board and want to get setup, look at the startup guide.
If you want all the details, look at the programming guide.
Kyu / tom@mmto.org