Difference between revisions of "KB11-C CPU"

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The '''KB11-C''' [[Central Processing Unit|CPU]] is the later CPU for the [[PDP-11/70]]; it is basically the same as the earlier [[KB11-B CPU]], except that it uses the [[FP11-C Floating-Point Processor]] instead of the [[FP11-B Floating-Point Processor]]  
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The '''KB11-C''' [[Central Processing Unit|CPU]] is the later CPU for the [[PDP-11/70]]; it is basically the same as the earlier [[KB11-B CPU]], except that it takes the later [[synchronous]] [[FP11-C Floating-Point Processor]], instead of the [[asynchronous]] earlier [[FP11-B Floating-Point Processor]]  
  
 
==Boards==
 
==Boards==

Revision as of 03:15, 13 May 2018

The KB11-C CPU is the later CPU for the PDP-11/70; it is basically the same as the earlier KB11-B CPU, except that it takes the later synchronous FP11-C Floating-Point Processor, instead of the asynchronous earlier FP11-B Floating-Point Processor

Boards

The basic KB11-C consisted of fifteen hex boards, basically the same board set as the earlier KB11-B, except that two boards:

  • M8133 ROM and ROM Control
  • M8138 System Status Registers

were replaced with the:

  • M8123 ROM and ROM Control
  • M8138-YA System Status Registers

respectively.

Note: The "PDP-11/70 Maintenance and Installation Manual", EK-11070-MM-002, refers to the M8133 in board lists for the KB11-C where M8123 is meant.