@_radv_
Please understand,,,, pinePhone.... vrs..... pinePhonePro
the 1st has allwinner A64 cpu, the 2nd has rockchip rk3399 cpu
Compeletly different, at least vrs uboot and locations (and especially dtb,, this is essentially your bios)
Info for 1st same as original pine64 SBC,,,,
IIRR priority for A64 boot is SD card 1st
A64 is really efficient vrs power draw, but weak computationly
You could try,,, all on SD card
------
save 1st 16M, save mbr, blank (/dev/zero) 1st 16M, restore mbr
-----
Not sure 16M is right, look at card with fdisk to see where 1st partition starts,
save everything before that (so if you have made an error,, easy to go back)
there is sure to be a uboot on internal emmc
to find search order on uboot
strings uboot | grep _target ,,,,, mmc1 is SD, mmc0 is emmc
Please understand,,,, pinePhone.... vrs..... pinePhonePro
the 1st has allwinner A64 cpu, the 2nd has rockchip rk3399 cpu
Compeletly different, at least vrs uboot and locations (and especially dtb,, this is essentially your bios)
Info for 1st same as original pine64 SBC,,,,
IIRR priority for A64 boot is SD card 1st
A64 is really efficient vrs power draw, but weak computationly
You could try,,, all on SD card
------
save 1st 16M, save mbr, blank (/dev/zero) 1st 16M, restore mbr
-----
Not sure 16M is right, look at card with fdisk to see where 1st partition starts,
save everything before that (so if you have made an error,, easy to go back)
there is sure to be a uboot on internal emmc
to find search order on uboot
strings uboot | grep _target ,,,,, mmc1 is SD, mmc0 is emmc