Maybe you're right. The PDP-11 FAQ mentions an 11/34c, but the paragraph is
a little difficult to parse. I was under the impression that the cache
turned an 11/34a into an 11/34c.
"11/34a, 11/34c. The /34a with the "right cache" presented a higher level of
performance than the then "hot machine" of the time - I believe it was the
/60 - in the eyes of -11 engineering / central engineering. The "c" upgrade
was the re-establishment of the original cache. Thus, the /34c was an
internal mythical model to allow FS to keep track of what systems had the
upgrade - much like the /35 vs /40 clock mod that made the /35 faster."
http://www.village.org/pdp11/faq.pages/11model.html
I installed the FP11 and KK11 last night, following info from the "11/34A
rebuild project" thread from this list in 1999. With the cache in I get a
bus error. With just the FP11 in, it runs RT-11 again, but evidently this
build of RT11 doesn't look at the FP11, because a "sho all" says nothing
about the FP. I'll have to download a different version tonight.
Thanks for the pointers, all. There are so many search hits for "pdp-11/34",
it would have taken me a long time to filter out the good ones. I have some
more reading to do.
--
Jonathan Engdahl Rockwell Automation
Principal Research Engineer 1 Allen-Bradley Drive
Advanced Technology Mayfield Heights, OH 44124 USA
Mayfield Heights Labs jrengdahl_at_safeaccess.com 440-646-7326
----- Original Message -----
From: "Zane H. Healy" <healyzh_at_aracnet.com>
To: <classiccmp_at_classiccmp.org>
Sent: Thursday, April 11, 2002 10:57 PM
Subject: Re: PDP-11/34c website?
> > Is there a website somewhere that will tell me exactly how to
> > put the boards in an 11/34c? Someone gave me a working 11/34a.
> > It boots RT-11. I want to add the cache and floating point
> > boards. I've never had my hands on a UNIBUS machine before.
>
> Potentially stupid question, but isn't this still a PDP-11/34a? Is there
> such a thing as a PDP-11/34c?
>
> One place you might want to start is the PDP-11/34 User Manual at:
> http://www.spies.com/~aek/pdf/dec/pdp11/
>
> Zane
>
Received on Fri Apr 12 2002 - 08:40:26 BST