PDP-11/84, PMI and Q-bus

[Johnny Billquist]

"Rod Smallwood" <RodSmallwood at mail.ediconsulting.co.uk> skrev:

 > Hi
 >
 > Well that's seems to define the 11/84.
 > How does this all apply to the 11/94
 > (which is the real problem)

Well, the UBA is the same, so the same PMI Unibus signals are originated 
at that end.
No memory can exist in an 11/94 though, since all the memory are on 
board. However, the communication between the CPU and UBA is using the 
PMI protocol, still.

However, the dealings with interrupts and so on must still be done in 
the same way as for the 11/84 as well.

So I would say that the 11/94 behaves exactly like the 11/84.

(Do anyone know if an 11/94 with 2 megs on board could use an external 2 
megs?)

	Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol