Best name for PDP-11/05-10
jnc at mercury.lcs.mit.edu
Thu Feb 25 07:55:11 CST 2016
> From: Paul Koning
> FWIW, I have always heard 11/05 and 11/40 respectively.
Good to know that others have the same vibe that I do.
> From: Bill Degnan
> putting all of that original 11/10 stuff aside :-)
> There is a version of the processor handbook with all 4, and there is a
> version with just 11/40. I have never seen a processor handbook for
> just the 11/35, 11/05, or 11/10 by itself.
BTW, there's often some confusion; some people think the 11/05-10 was the
second PDP-11. It wasn't, it's the fourth, and those processor handbooks
confirm that. The first 11/45 one is dated 1971, the 11/40 one is 1972,
and the one with the four is 1973.
> I always treated the 11/05 and 11/10 as separate machines, just as much
> as the 11/05 S and 11/05 NC.
Can you please remind me again what the differences with the 11/05NC are? I
remembered we discussed it, but I'm too lazy to dig through the list archives
As far as I know, the original 11/05 and original 11/10 differ only in i)
the number on the front, and ii) what options were standard/offered in each;
the hardware is entirely identical.
> Not sure if there is an 11/10 model S or NC.
There is definitely an 11/10S (again, identical internally, AFAIK, to
the 05S - the DEC manual for the 05S-10S says exactly that).
> From: Paul Anderson
> The 11/05 and 11/10 .. use about 6 different backplanes, most of then
> listed in the Unibus Troubleshooting Guide.
I know of 3, will have to look there to see what else it says.
> A lot of people have gotten into trouble thinking all the backplanes
> were the same.
Yes! I know of two for the 11/05-10: one holds one MM11-L, with four SPC
slots; one holds two MM11-L's, with only a single SPC slot. The 11/05S-10S
have a different backplane which holds a single MM11-U, and has 3 SPC slots.
Needless to say, trying to plug an SPC board into a memory slot, etc will
lead to tears (and probably smoke, too... :-)
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