Boot process

[Arwen]

As long as you test with the SD card, their is no chance of bricking.
Even if you make a mistake with the eMMC that prevents booting to either the eMMC or SD card, their are recovery techniques available.
Just stay away from programing the SPI with U-Boot, these boot problems are harder to recover from.

Here are some hints on where U-Boot lives;

https://wiki.pine64.org/index.php?title=...le_Storage
https://wiki.pine64.org/index.php?title=...root_drive
https://wiki.pine64.org/index.php?title=...ash_device

We really need a Wiki section on booting in general, & U-Boot in specific, with;

• Description
  
• General maintenance
  
• Development
  

Edit: I started a Wiki page on the boot loader for the Pinebook Pro, (and indirectly the ROCKPro64);
https://wiki.pine64.org/index.php?title=...t_sequence
It's only started, so give it time to get fleshed out / more details.