Booting the Pinebook Pro

[tophneal]

Am I correct in thinking the OSes listed in the wiki have the boot code in them ?  (all of them) ? ?

Yes, all of them should be capable of either/or (sd/emmc) booting. For example the emmc-installer images of Manjaro are essentially just doing what we do manually with dd. It's available as an option for those not knowledgeable of dd yet.

However, not all them use the same boot code. Some use the BSP u-boot, which will use the default SoC boot order (like the Android, CrOS, and ayufan Ubuntus.) So far, though, these (excluding Android) are easily updated to the SD first u-boot, using mrfixit's update script.