Difference between revisions of "J-11 chip set"

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(External links: spec in DEC Semiconductor Databook)
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Most uses on DEC PDP-11 [[Central Processing Unit|CPU]] boards (all for the [[QBUS]]) contain an external [[cache]].
 
Most uses on DEC PDP-11 [[Central Processing Unit|CPU]] boards (all for the [[QBUS]]) contain an external [[cache]].
  
==External link==
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==External links==
  
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* [http://www.bitsavers.org/pdf/dec/internal/Semiconductor_Handbook_V1_1987.pdf DEC Semiconductor Databook, Volume 1], pp. 261-334
 
* [http://simh.trailing-edge.com/semi/j11.html J-11 (1983)]
 
* [http://simh.trailing-edge.com/semi/j11.html J-11 (1983)]
  

Revision as of 01:51, 29 March 2021

J-11

The J-11 (formally, the DCJ11, although DEC documentation uses both names) is a high-performance CMOS implementation of the PDP-11 architecture, used in both the KDJ11 CPUs, and a variety of peripherals. It was implemented in two chips ('Control' and 'Data') carried on a single 60-pin DIP carrier.

It implements the full PDP-11 Memory Management architecture (with split Instruction and Data address space support, as well as Supervisor mode). Although it contains built-in FP11 floating point support (using microcode), it can operate with an optional FPJ11 floating point accelerator chip for higher performance.

Most uses on DEC PDP-11 CPU boards (all for the QBUS) contain an external cache.

External links