Installation on an Orange Pi Plus 2 (Allwinner H3)

[Daniel Ziltener <dziltener%lyrion.ch@localhost>]

Hello!

I bought an Orange Pi Plus 2 with the Allwinner H3 chip. As I've seen at 
least one person managed to run NetBSD on this board. Now, since I got a 
bit confused by the instructions and also don't know which kernel I 
need, I request your help.

What I've done so far:

I downloaded the armv7.img, I dd'ed a compatible 
u-boot-sunxi-with-spl.bin into it and then dd'ed the resulting armv7.img 
onto the microSD. I also downloaded the matching .fex file. I know I 
have to compile the .fex, and am currently trying to get the tools to do 
that to compile on by NetBSD box. But after that I'm pretty much stuck 
and don't know how to proceed.

So, what I need advice for:

What kernel do I need for this device? How do I know what my boot.cmd 
needs? And do I need to do something else before plugging in the microSD?

Thank you very much in advance, and best regards,

Daniel Ziltener