The system is delivered on a 1.44M floppy image, which contains the
BefOS boot block, kernal, and the handful of sample pages which are
included in the default build.
If v86 doesn't work in your browser, you can
download the disk image
and use it in an emulator such as QEMU or DOSBox
or, wonder of wonders, a real IBM PC compatible — if you can write it onto
a floppy disk somehow...