• Boot sequence for USB mass storage

    From bob prohaska@3:770/3 to All on Sat Nov 13 15:31:38 2021
    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 https://www.raspberrypi.com/documentation/computers/raspberry-pi.html
    and haven't found an answer that I can recognize. Apologies if I'm dense!

    Thanks for reading,

    bob prohaska

    --- SoupGate-Win32 v1.05
    * Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)