Rev 7 again!

[William LeFebvre]

I know this has been hashed over before and please excuse the double
posting, but I need some help.

We just had one of our 750's upgraded to rev 7.  Its configuration is
as follows:

	2 Megabytes of DEC memory, 1 Megabyte foreign memory
	Massbus 0
	Unibus 0:
	    UDA-50 disk controller attached to an RA-60
	    DZ-11 terminal controller
	    DEUNA ethernet controller

After the upgrade, diagnostics ran ok and both VMS 3.6 and VMS 4.0
booted and ran fine.  But when we tried to boot 4.2BSD, this is what
happened:

	>>>B
	%%
	loading ra(0,0)boot
	0007092D  08

	FFFFFFFE  15
	>>>

The console error code "08" means that an exception came thru a vector
address ending in 2 and there was no UCS.  To be more specific:  a
vector type 2 means "service this interrupt in user control store."
The error code means that one of these types of interrupts happened
when there was no user control store (or it wasn't loaded).

Now we did this with the new microcode already loaded in (by booting
the diagnostic supervisor first).  I haven't tried it yet with the old
microcode.  Has anyone seen this problem before and know what to do
about it?  Naturally, the FS guy wants to blame Unix since the
diagnostics and VMS all work fine.

The microcode is another matter.  Where can I get patches for /boot so
that it will load the microcode in at boot time?  I have heard that
such a patch exists, and I was pointed at mod.sources as a place to get
this patch but the moderator says he has never heard of such a thing.

Our Field Rep wants to upgrade ALL our 750's, and (except for the one
that just got upgraded) they ALL run 4.2 BSD.  So this has suddenly
become a VERY important issue for us.

			William LeFebvre
			Department of Computer Science
			Rice University
			<phil at Rice.arpa>
                        or, for the daring: <phil at Rice.edu>