armv7.img does boot on BeagleBone (White)

Hi everyone.

My board is described here:
https://wiki.logre.eu/index.php/BeagleBone_White

I've downloaded image from here
https://cdn.netbsd.org/pub/NetBSD/NetBSD-10.0/evbarm-earmv7hf/binary/gzimg/armv7.img.gz

Then, I ungzipped it and dd-ed it to MicroSD card

Then, I booted my board.

That's what I see:

    0 cheusov>cu2bone
    Connected.
    CCCC

Image looks like the following

    [root@ryzen Downloads]# file ./armv7.img
    ./armv7.img: x86 boot sector; partition 1: ID=0xc, active, starthead 10, startsector 32768, 163840 sectors; partition 2: ID=0xa9, starthead 60, startsector 196608, 2451456 sectors
    [root@ryzen Downloads]#

MicroSD is fine. OpenBSD and Linux booted correctly.
dd-ing method (on Linux) was the same:

dd if=armv7.img of=/dev/sdd bs=1M status=progress oflag=nocache

What's wrong?