No, there's no difference (other than labeling) between 11/05 and 11/10. The
difference between the 11/35 and 11/40 are also just labeling. The issue that
I think most people run into is that the 11/35 is most often found in a BA11-K
chassis and the 11/40 is most often found in a BA11-F chassis. The chassis
choice determines the console board physical layout but that does not determine
if it's an 11/40 or an 11/35.
TTFN - Guy
On Jun 25, 2013, at 9:39 AM, "Henk Gooijen" <henk.gooijen at hotmail.com>
wrote:
Sorry for top-posting, but that is how this thread
goes ...
I cannot check at this moment the difference between the 11/05 and 11/10
because they are both in storage. However, I seem to remember that there
are differences between the 11/35 and 11/40 (where the 35 was for OEM).
The 2 ribbon cables from the console (at the rear side) are at opposite
sides for the 35 and the 40 (IIRC).
- Henk
--------------------------------------------------
From: "Paul Anderson" <useddec at gmail.com>
Sent: Tuesday, June 25, 2013 5:32 AM
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>
Subject: Re: PDP-11/34 verses a PDP-11/39
> Sounds like the same marketing idea as the 11/15-11/20, 11/05-11/10,
> 11/35-11/40 and the 11/45-11/50. I think they changed product lines and oem
> ideas about that time.
>
> Thanks, Paul
>
>
> On Mon, Jun 24, 2013 at 8:59 PM, Lyle Bickley <lbickley at
bickleywest.com>wrote:
>
>> When I saw Jack Rubin selling a PDP-11/34/39 manual on eBay, I had to
>> buy it. I thought perhaps the "11/39" was just a misprint - but...
>>
>> The preliminary manual is titled "PDP-11/34/39 USER'S GUIDE" and is
(c)
>> 1975. Below the copyright is: "Written by PDP-11 Engineering".
>>
>> In perusing the manual, I quickly went to the section describing the
>> two systems. Here's the opening paragraph in section 3.1:
>>
>> "PDP-11/34 AND PDP-11/39 SYSTEM DESCRIPTION"
>>
>> "The PDP-11/34 and PDP-11/39 Computer Systems consist of a set of
>> modular building blocks combined to suit a customers needs. The
>> PDP-11/34 System is designed for original equipment manufacturers
>> [OEM's] while the PDP-11/39 system is designed for end users..."
>>
>> The manual then defines the "basic components" of each system.
>>
>> Both contain a KD11-E central processor, KY11-LA Operators Console,
>> Unibus, M9302 Unibus Terminator and Core or MOS memory.
>>
>> The differences are:
>>
>> The 11/34 contains:
>>
>> M9301-YA Terminator/ROM
>>
>> The 11/39 contains:
>>
>> M9301-YB Terminator/Boot/Diagnostic
>> DL11-W Serial Line Interface
>> M7850 Parity Controller
>>
>> My guess is that DEC Marketing decided that only one system model made
>> sense - and the original "11/34" configuration was scrapped and the
>> "11/39" configuration became the 11/34 we know it...
>>
>> The manual also contains a number of hand written notes and
>> corrections - and on first view looks to be substantially different
>> than the "PDP-11/34 User's Guide" we 11/34 fans have come to
appreciate.
>>
>> Cheers,
>> Lyle
>> --
>> Bickley Consulting West Inc.
>>
http://bickleywest.com
>>
>> "Black holes are where God is dividing by zero"
>>