[ Please don't reply to the list--if you have more questions, send 'em
  to me.  This can't be of interest to most people on the list. ]

> The first half, I gathered from this old book on the 020 and 030.  The 
> 040's is different, huh.  What a drag.  How drastic are the differences?  
> Does NetBSD use the PMMU/030 MMU to signal page faults, etc. for the 
> swap/virtual memory, or is it all handled with a table lookup scheme?

Take a look at locore.s and trap.c in src/sys/arch/mac68k/mac68k...
Address errors, bus errors, and other traps are handled in these files.

-allen

-- 
Allen Briggs - end killing - allen.briggs@bev.net ** MacBSD == NetBSD/mac68k **
   Where does all my time go?  <a href="http://www.netbsd.org/">Guess.</a>