i'm not sure what the problem here is, but if i boot my shark with
com.c 1.156, it hangs after loading the kernel.  i had to add the
missing (new?  can someone tell me what happened here, and when?
i'm mostly curious) BUS_SPACE_BARRIER_{READ,WRITE} and move the old
s/SPACE_// versions to conditional code to make it build, also.