Supposing for a moment that I want to use the bootcode.bin-only method of booting a Pi3 can somebody tell me how much of the software in the DOS partiton of the USB device is invoked?
I've always thought that u-boot on the microSD started u-boot on the USB device, but it's never stated in so many words.
It's unclear to me if the steps:
Recurse through each MSD
If bootcode.bin found boot
mean _run_ the newly-found copy of bootcode.bin or merely use it as a flag to denote which device to boot.
I've waded through the voluminous material at
formatting link
haven't found an answer that I can recognize. Apologies if I'm dense!
Thanks for reading,
bob prohaska