(2020-10-02, 02:31 PM)jim321 Wrote: https://www.raspberrypi.org/documentatio..._config.md
as far as i know if you have the setting for boot from usb used then to boot from the sd card you cant have a usb drive connected to the pi. it does not work the same as a bios. i could be wrong but i think thats how it works
i do have an atomicpi x86 processor that has a bios that i am going to test with Lubuntu /openplotter. some day
From the document above:
BOOT_ORDER fields
The BOOT_ORDER property defines the sequence for the different boot modes. It is read right to left and up to 8 digits may be defined.
- 0x0 - NONE (stop with error pattern)
- 0x1 - SD CARD
- 0x2 - NETWORK
- 0x3 - USB device boot - Reserved - Compute Module only.
- 0x4 - USB mass storage boot (since 2020-09-03)
- 0xf - RESTART (loop) - start again with the first boot order field.
- Default: 0xf41 will retry the SD boot if the SD card detect pin indicates that the card has been inserted or replaced.
- The default boot order is 0xf41 which means continuously try SD then USB mass storage.