4x9 SIMMS in a 4D/25

[Curt Freeland]

I have been asked to add some 4x9 SIMMS to a 4D/25 that currently has
12 1x9 SIMMS in it.  The owner of the system purchased some SIMMS, 
and when I installed them in the last 4 SIMM sockets, the system
would run, but still only knew it had 12 Meg of memory.  I removed the 12
1x9 SIMMS, and moved the 4x9 SIMMS to the "first" slot of each bank.
Now the system could not find any memory.

For the Sun systems we maintain, I have a Field Engineers manual that 
tells the magic incantations to make such things work.  Is there such a
manual for the SGI boxes?  I could not find any hardware help in the 
manuals on-site.  Is there anything that gives this type of information?
I cannot find any jumpers on the CPU card to set SIMM size.   Did I miss
them?  Does the system require new boot Proms?  We currently have Proms 
labelled:
070-8000-007
070-8001-007
070-8002-007
070-8003-007 (boot 3)

Have any of you made 4x9 SIMMS work in the 4D/25?  Can you mix 1x9 and 
4x9 SIMMS in the same system?

The label on the back of the box claims:
Model CMNB001
4D/25

Any help/pointers would be appreciated.

--curt


--
Curt Freeland
Manager, Systems Engineering
Purdue University Engineering Computer Network
(curt at mischief.ecn.purdue.edu) (317) 494-3715