Window Maker Live for Pinebook Pro

[vajak]

cfdisk seems to think this is a ISO image, anyway there is no partition  table and no MBR
Is there no uboot in the first 16M?
How in the world could you boot a dd'd image (onto SD card) unless you had tow-boot on emmc

cfdisk is correct, there is no partition table nor MBR, but just an EFI bootable ISO image.
So no uboot involved, but only EFI.
tow-boot seems to have no trouble booting from ISO images using EFI

As correctly assumed by 'Der Geist der Maschine', on my PBP tow-boot is exclusively installed to SPI and no other uboot present.

Since i didn't care for suspend to ram, i preferred tow-boot over Mr. Fixit's original but by now probably outdated uboot.

Over at the pine64 discord in the pinebook sub section i was told that any recent uboot is able to boot from EFI.