The subject question is apropos of finding boot methods that multiple 
OF versions support.  It has been speculated on this list that OF 1 
(and others) may support FAT-16 disk partitions if the disk uses the 
MBR to partition the disk.

What the question really translates to is:  Can you format sector 0-? 
so that OF will think a disk is MBR-partitioned, and NetBSD (and 
MacOS) will think the disk is Apple-partitioned?  Alternately, so 
that OF will think a disk is MBR-partitioned, and NetBSD will think 
it's *BSD partitioned?  Fundamentally, do APM and MBR have 
conflicting requirements on the contents of sector 0 or 1?

I have this kinky thought that it would be fun to use a Microsoft 
format to get (vendor independent) Open Firmware to boot NetBSD on 
Apple computers.  Call me twisted, but it did work for floppy 
booting.  If it did work it probably wouldn't work with MacOS though.
-- 
The opinions expressed in this message are mine,
not those of Caltech, JPL, NASA, or the US Government.
Henry.B.Hotz@jpl.nasa.gov, or hbhotz@oxy.edu