just don't forget, that this serial adapter for BPB, sold by Pine is totally incompatible with PBP, because it's 5V whereas PBP expects 3V (not even 3.3V!) somehow Pine64 is silent about it for a long time, despite numerous requests from users, experiencing BPB operational instabilities while using the adapter.
and also, don't forget, that except eMMC, there is SPI NOR flash, that gets the highest boot priority, with even harder ways of recovering. the boot ROM choice is rather good though, because normally, FW should go into SPI, then if not, - eMMC. putting it into an SD card is rather some of "for tinkerers" stuff. but normally, FW is stable.
despite the said, it's recoverable anyway.
and also, don't forget, that except eMMC, there is SPI NOR flash, that gets the highest boot priority, with even harder ways of recovering. the boot ROM choice is rather good though, because normally, FW should go into SPI, then if not, - eMMC. putting it into an SD card is rather some of "for tinkerers" stuff. but normally, FW is stable.
despite the said, it's recoverable anyway.
ANT - my hobby OS for x86 and ARM.