Qemu again

Hi!

I'm trying to set up testbench for software on different archs and I
ran into few issues when trying to get openbsd to work.

Has anyone done full install and taken notes how to get OpenBSD to run
on Qemu-system-ppc ?

My current wishlist is short:
1) OpenBSD running
2) network for it

Point 1) successed from install66.iso  but the installed system doesn't boot
Trying hd,\\:tbxi...
No valid state has been set by load or init-program

I've tried few boot hd,:ofwboot /bsd variations but I'm stuck.

I try to start Qemu 4.2.0 on AMD64 linux with:
qemu-system-ppc -M mac99 -cpu g4 \
-usb -device usb-kbd \
 -hda obsd-ppc32.qcow
If I add anything on command line considering network, OpenBSD hangs,
panics or exits to firmware.

What am I missing?

Best regards,
Hannu Vuolasaho