Ok, Talking out of my hat completely but can you extract enough of X11 to initialise the server and exit? maybe a main.c that wraps around the initialisation code of an apropriate X11 VGA driver.
If you can do this then your fb drawterm could just map the relevant bit of memory and draw in it, much like the plan9 vga driver. If you got clever enough (wasn't somone working on pass-through drivers for xen?) you could run a real plan9 terminal in another xen VM and it could map the physical framebuffer offered by Linux in dom0. See? I told you I didn't know what I was talking about. -Steve
