Hi,
I managed to boot from an usb stick but only when an SD card is present. If not the console shows:
EMMC:800;NAND:81;SD?:20000;USB:8;LOOP:1;EMMC:800;NAND:81;SD?:20000;USB:8;LOOP:2;
until I insert the SD card. (no EMMC present and switch is in MCC state).
I was hoping to be able to boot from USB without the SD card being present. Is that possible?