Building a PDP-11 for the first time

From: Patrick Finnegan <pat_at_computer-refuge.org>
Date: Fri Dec 12 10:37:17 2003

On Friday 12 December 2003 11:27, John Allain wrote:
> >> Jerome Fine replies:
> >>
> >> First, the M8190-AB is a PDP-11/73 CPU board and
> >> usually runs in an ALL Qbus system. Don't forget that
> >
> > Patrick Finnegan answers:
> > So can someone fix this in the "FIELD GUIDE TO Q-BUS
> > AND UNIBUS MODULES"
> > doc? It's got an M8190 listed as an 11/84 CPU.
>
> Possible Classiccmp parity error detected.
> Inconsistent information.
>
> In another source
> KDJ11-A_UsersManual.pdf. page.73/2-18,
> the M8192 is the J11, which is the 11/73 CPU.
>
> I tend to trust the Field Guide, and the list too, for that
> matter. But trust then verify.

>From what I understand, the 11/73 and 11/83 are both J-11 cpus, the only
difference being that the /73 runs at 15MHz and the /83 runs at 18MHz.
The issue is that there's NO SUCH THING as an 11/84 cpu card, since
11/84 systems use an 11/83 (ie qbus) cpu with a Qniverter to convert to
UNIBUS.

Pat
-- 
Purdue University ITAP/RCS
Information Technology at Purdue
Research Computing and Storage
http://www.itap.purdue.edu/rcs/
Received on Fri Dec 12 2003 - 10:37:17 GMT

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