Rock64

[MarkHaysHarris777]

There is also the Rockchip's own Open Souce wiki and their linux github repos. And then there's the rock64 repo by pine64. Between them, and other stuff you can find on the wiki page Stephen linked above, there's plenty of places to get info from, and lots of information is being made available by Rockchip.

Yes, though nothing explicitly stating the "open-source" license requirements or anything even noting an "open-source" treatment for the hardware.

I'll keep asking around!

hi, the answer is actually no.  

... while much of what the system is, and how it works, is "open" it would be inaccurate to call it open source hardware in the sense that the Arduino is 'actually' open source hardware;  you can actually make an arduino board as good or better than the original, yourself,  and I've done just that !  But, that is NOT going to happen with the Rock64;  no way. Depending on version this is a seven or eight layer board with specific components that are hard to secure and which require very expensive hardware to assemble;  I believe there are only two site in China (for instance) capable commercially of building this board at all !