Help! Can't boot A/UX

[David S. McCormick]

This morning I tried booting A/UX from Mac IIfx with sys 6.0.7 and it froze.
This has happened before, so I made sure to do the standard recovery
by first minimizing the number of INIT's loading and by putting the
heap back to the minimal amount (default plus 80k). Then I invoked
	
		fsck -p /dev/dsk/c0d0s0

and another time

		autorecovery

after cancelling the A/UX Startup.

Both fsck and autorecovery told me that the file system was dirty and modified.
But when I tried to boot subsequently, the startup died about 1/8 to 1/5 of
the way done with a "Unexpectedly quit. System Error 3", the dreaded
"Illegal instruction" Dire Straits error. I allowed TMON to load after
resetting, and when the same error was encountered, the illegal instruction
was at 40800000 in an assembly routine called 'MYROM'. Subsequently TMON
froze up with a "Nasty Exception" message; in the Finder the machine would 
freeze when I put the cursor over the Apple Menu.

I have been able to recover from these errors in the past via fsck and 
autorecovery.  Can anyone help?  Thanks, in advance, Gurus and neo-Gurus.

David S. McCormick

MIT-EAPS Geology
Cambridge, MA  02139
dmac at athena.mit.edu
617-253-9852