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70's computer from CEFAS of Lowestoft
70's computer from CEFAS of Lowestoft
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Description: A picture of a very old PC from the early 70's where my Dad used to work (was called 'Ministry of Fisheries' back then). I know so little about this machine or even it's name for that matter! All I know it is took HUGE 16k RAM slices the size of ATX computers.


P.s. Just edited the title, could be a bit latter then 'early 70's' so just put '70's' to be safe.
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Posted by: tokyoracer at December 05, 2009, 09:40:20 PM

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Comments (6)

December 14, 2009, 05:27:05 PM

The two tapes weren't a cache. They worked like a swap file or partition on a modern computer. They were used to dump the memory area of the current program when It switched between aplications.
December 01, 2009, 05:31:37 PM
Wow thanks guys for that info! :D

I really have no idea about these sorts of machines. All I know is they were the "Difference Engines" of the future, just a digital version of (even though it was 100 years after). It did exacly the same sort of job working out huge sums and others like organising codes etc.
December 01, 2009, 11:59:51 AM
Sure is an old PDP-11, made by Digital Equipment Corporation. They can still be found here and there doing actual work, some of it presumably critical work so no one dares to touch them. :o). If I remember correctly those four reels are some kind of tape- based cache memory.
December 01, 2009, 10:53:32 AM
Well, now I'm sure It's a PDP-11.
Take a look to this picture: http://upload.wikimedia.org/wikipedi.../Pdp-11-40.jpg
It has the same modules, mounted on a different arrangement, in a single cabinet.
Just a curiosity, the 68000 design was based on those machines

From wikipedia:

"The 68000 grew out of the MACSS (Motorola Advanced Computer System on Silicon) project [..]"
"The MACSS team drew heavily on the influence of minicomputer processor design, such as the PDP-11 and VAX systems, which were similarly microcoded."

Reference: http://en.wikipedia.org/wiki/68000
November 30, 2009, 02:32:43 PM
You may be right, more likely to be a giant calculator although a calculator is little more then a simplified computer if you ask me.

I belive it's job was to work out big sums of bills and basically keeping order of everything (a job that's now done by terribly unreliable Windoze servers).
November 29, 2009, 01:56:43 PM
Hmmm... I'm pretty sure It wasn't a PC.
It looks to have been a PDP minicomputer, or something like.
Just, take a look at http://en.wikipedia.org/wiki/Programmed_Data_Processor

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