OpenBSD domU configuration example ?

[Joel Carnat <joel%carnat.net@localhost>]

Hello,

I'm running NetBSD 5.0_STABLE/amd64 with Xen 3.3.1.

I would like to run OpenBSD 4.6 as a domU.
It boots but freezes in the begining of the boot process.
I just see a blue banner after the kernel has been loaded.
'xm dmesg' doesn't say anything.

My configuration file is:
-----
name = "obsd"

kernel = "/usr/pkg/lib/xen/boot/hvmloader"
builder='hvm'
device_model = '/usr/pkg/libexec/qemu-dm'

memory = 256

vif = [ 'bridge=bridge0, type=ioemu, model=ne2k_pci' ]

disk = [ 'file:/home/xen/obsd/disk,ioemu:hda,w', \
        'file:/home/xen/obsd/install46.iso,ioemu:hdc:cdrom,r' ]
#disk = [ 'file:/home/xen/obsd/disk,ioemu:hda,w' ]

boot='d'

vnc = 1
vncdisplay = 0
vncunused = 0
vncpasswd = ""
vnclisten = '10.0.0.52'
-----

I also tried various options from 
http://blog.dcoy.org/2009/05/03/openbsd-45-released-install-as-xen-domu-4275.html 
but I can't have obsd to boot.

Anyone has a working configuration to show ?

TIA,
        Jo