Which PDP?

[Curt at Atari Museum]

Eric,

   Thanks for the clarification, my mistake, I thought my old 11/84 was  
Uni and Qbus CPU/Bridge in the same system, so I thought it meant it was 
a dual bus system outside of the Qbus cards in it.


Curt


Eric Smith wrote:

>Curt wrote:
>  
>
>>You should also consider if you want a Unibus system (even numbered) or
>>a Qbus system (odd numbered) or a hybrid like an 11/83.. though thats an
>>80's system, hmmmmm....
>>    
>>
>
>The 11/83 is a Qbus system.  There aren't any "hybrid" systems.
>
>You were perhaps thinking of the 11/84 and 11/94 Unibus systems, which use
>the same CPU modules as the 11/83 and 11/93 Qbus systems.  But when those
>modules are used in the 11/84 and 11/94 backplane, there is *NOT* a Qbus
>present.  There is a somewhat-Qbus-like bus, but it is not compatible with
>Qbus either electrically or in terms of bus protocol.
>
>Anyhow, none of those meet the "70's design" criteria Ian specified.
>
>Eric
>
>
>
>  
>


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