anyone able to bhyve openbsd 7.0 ?

Hi,

I seem unable to bhyve install OpenBSD 7.0. I'm running recent
stable/13: stable/13-n247974-1da2deab7c2

The command I'm running is

% sudo bhyve -AHP -s 0:0,hostbridge -s 31:0,lpc \
-s 2:0,virtio-net,tap0 -s 3:0,virtio-blk,./obsd70.img \
-s 4:0,ahci-cd,/usr/home/REDACTED/isos/OpenBSD/amd64/cd70.iso -c 4 -m 4096M \
-s 29,fbuf,tcp=0.0.0.0:5900,w=800,h=600,wait \
-s 30,xhci,tablet -l bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI_CSM.fd \
openbsd70

in vncviewer it shows:

Boot Failed. CDROM 0
Boot Failed. Harddisk 1
Boot Failed. EFI DVD/CDROM
Boot Failed. EFI Misc Device

At the console, I see:                                                                        
fbuf frame buffer base: 0x943800000 [sz 16777216]
pci_fbuf: mmap_memseg failed
pci_fbuf: munmap_memseg failed
pci_fbuf: mmap_memseg failed
pci_fbuf: munmap_memseg failed

in order for the prompt to return, I have to first close vncviewer and
then 'sudo bhyvectl --vm=openbsd70 --destroy'

the console then shows 'vm_run error -1, errno 6' and my prompt returns.

Similar results with BHYVE_UEFI.fd

if I change ahci-cd to point to install70.iso, it first tries to load
from the image then fails then tries to pxe boot, fails, then http boot,
then drops to the uefi prompt.

What's the right way to do this? I've been following
https://docs.freebsd.org/en/books/handbook/virtualization/#virtualization-host-bhyve
section 22.7.5. Graphical UEFI Framebuffer for bhyve Guests. If I follow
the instructions for legacy non-graphical boot the prompt never returns.

thanks,
-- 
J.