Difference between revisions of "PDP-11/40E"

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The '''PDP-11/40E''' was a modified version of the basic [[PDP-11/40]], produced in small numbers at [[CMU] for use in the [[C.mmp]] [[multi-processor]] system, which ran the [[HYDRA]] [[operating system]]. It added a writeable [[microcode]] extension (adding 1K micro-words to the original 256), [[hardware]] for general field shift and extraction, and extension of the microcode width from 56 bits to 80. The extra hardware uses the [[Central Processing Unit|CPU]] [[backplane]] slots normally used for the [[KE11-E Extended Instruction Set|KE11-E]] and [[KE11-F Floating Instruction Set|KE11-F]] options.
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The '''PDP-11/40E''' was a modified version of the basic [[PDP-11/40]], produced in small numbers at [[CMU]] for use in the [[C.mmp]] [[multi-processor]] system, which ran the [[HYDRA]] [[operating system]]. It added a writeable [[microcode]] extension (adding 1K micro-words to the original 256), [[hardware]] for general field shift and extraction, and extension of the microcode width from 56 bits to 80. The extra hardware uses the [[Central Processing Unit|CPU]] [[backplane]] slots normally used for the [[KE11-E Extended Instruction Set|KE11-E]] and [[KE11-F Floating Instruction Set|KE11-F]] options.
  
 
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** [http://www.bitsavers.org/pdf/dec/pdp11/1140/1140E/Oakley_A_Comparison_of_Two_Microprogrammable_Processors_May75.pdf A Comparison of Two Microprogrammable Processors]
 
** [http://www.bitsavers.org/pdf/dec/pdp11/1140/1140E/Oakley_A_Comparison_of_Two_Microprogrammable_Processors_May75.pdf A Comparison of Two Microprogrammable Processors]
 
** [http://www.bitsavers.org/pdf/dec/pdp11/1140/1140E/A_PDP1140E_Microprogramming_Primer_Jul78.pdf A PDP-11/40E Micro-programming Primer]
 
** [http://www.bitsavers.org/pdf/dec/pdp11/1140/1140E/A_PDP1140E_Microprogramming_Primer_Jul78.pdf A PDP-11/40E Micro-programming Primer]
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* [https://kilthub.cmu.edu/articles/journal_contribution/PDP-11_40E_microprogramming_reference_manual/6608333/1 PDP-11/40E Microprogramming Reference Manual]
  
 
{{PDP-11}}
 
{{PDP-11}}
  
 
[[Category: UNIBUS PDP-11s]]
 
[[Category: UNIBUS PDP-11s]]

Revision as of 03:45, 16 March 2022

The PDP-11/40E was a modified version of the basic PDP-11/40, produced in small numbers at CMU for use in the C.mmp multi-processor system, which ran the HYDRA operating system. It added a writeable microcode extension (adding 1K micro-words to the original 256), hardware for general field shift and extraction, and extension of the microcode width from 56 bits to 80. The extra hardware uses the CPU backplane slots normally used for the KE11-E and KE11-F options.

External links