11.1 release stuck at boot on BananaPi M1

[Luca Cappelletti]

Goodmorning everyone,
the version in question (11.1 release) can not overcome the boot phase 
by lamenting the lack of a dtb blob file.

I downloaded the official image at:
ftp://ftp.freebsd.org/pub/FreeBSD/releases/arm/armv6/ISO-IMAGES/11.1/FreeBSD-11.1-RELEASE-arm-armv6-BANANAPI.img.xz
so I wrote the SD card with the classic dd command

The same operation worked with a RaspberryPi B and its official image at:
ftp://ftp.freebsd.org/pub/FreeBSD/releases/arm/armv6/ISO-IMAGES/11.1/FreeBSD-11.1-RELEASE-arm-armv6-RPI-B.img.xz

Can you help me understand where I was wrong?

Thanks in advance
regards

Luca