[pups] Advice on which PDP-11 processor handbook to buy

Johnny Billquist bqt at softjar.se
Wed Jan 24 22:07:44 AEST 2007

Bill Gunshannon wrote:
>>The major groupings you can do with the PDP-11 systems are otherwise if
>>they have split I/D space, supervisor mode, unibus map and 22-bit
>>addressing, floating point (none/FIS/FPP) and EIS.
>>Rougly, you can say:
>>11/34: EIS. Optional FPP.
>>11/40: None of that. Optional EIS and FIS.
>>11/44: All of it. Optional FPP.
>>11/45: split I/D, supervisor, EIS. Optional FPP.
>>11/60: EIS. Optional FPP.
>>11/70: All of it. Optional FPP
> And let's not forget the CIS Option.  :-)

Right. And I forgot to mention the 11/24 as well. (I'm ignoring the 
Q-bus machines, and really old/small unibus machines as well.)

So we also have CIS. And to adjust the list above:
11/24: EIS, unibus map and 22-bit addressing. Optional FPP and CIS.
11/44: Optional CIS.


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