Hi Balbes, I write an armbian image (generic) to an USB thumb; I manage to do that. Than I put a .dtb file I found for sun50iw9p1-dts in the directory with other dtb files. Then I edit the uEnv.txt file and point it to my .dtb file.
Now the question...What need I to do to let the TV box boot from a SD card (not the USB cause I suspect that from usb does not work).
Must I download a u-boot file and dd it to the sd card? Which u-boot must I have? Here below the specs of th TV box:
Allwinner H616 Mali G31
linux for T95 Allwinner H616 Android 10 TV Box
https://forum.armbian.com/topic/8434-the-list-of-models-that-are-running-armbian-amlogic-rockchip-allwinner-etc/page/2/?tab=comments#comment-96218