>This I guessed :-) I was thinking about the CPU box "door" doesn't
have any 
	>additional DSSI connectors on it so I was wondering if there was a
special 
	>front door for system with this option installed (I took out the
CPU card 
	>and noted that it was indeed an option so presumably I could remove
it 
	>without harming anything) There is also a connector and stand-offs
for 
	>another option card closer to the "front" or "top" (farthest away
from the 
	>backplane connector) that is not populated. What can go there?

	I don't know exactly how it was done but the IPB seems
	to be of no use (at least the one I have, there are several others
	that I don't have ... the BA440 one is probably what is needed
here).

	The maintenance guide indicates that the DSSI #2 pops out of
	a special bulkhead which optionally lives in slot 11 and 
	DSSI #3 comes out of an optional bulkhead in slot 12.

	However, there appears to be a config with an M9404
	(load board or SCSI i/face??) in slot 12 and the DSSI bulkheads
	pushed back to 10 & 11. Either way you lose some
	Qbus slots.

	I don't know exactly how the internal cabling works.

	>The SID is the same as the KA680 so I'm guessing that just means
"I'm an NVAX"

	Yes. The family differences are all in the SIE.
	In fact, this will be true of all chip-based machines
	(i.e. all NVAX ones will be similar, all CVAX ones will be
	similar etc.) although anything other than the top
	byte is subject to change as chip ucode and
	hw revs change (or rather chang*ed* since there
	won't be any more ...)

	Antonio