I am trying to build the most basic Genode build that creates a bootable ISO image that, once booted, brings me to a command prompt and outputs to a screen, not to a serial connection.  I'm fairly familiar with the build process and I have made numerous demo builds work from within qemu but I am trying to make a stand-alone bootable image.  So far I am only getting the boot loader message where the kernel loads (in this round I am simply using the Nova hypervisor but any kernel is fine for my demo boot).  What am I missing to make this happen?