Difference between revisions of "LSI-11/2"

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(add kd11-na)
(same QBUS as LSI-11)
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[[Image:KD11-HA CPU.jpg|thumb|right|350px|LSI-11/2 card]]
 
[[Image:KD11-HA CPU.jpg|thumb|right|350px|LSI-11/2 card]]
  
The '''LSI-11/2''' (also known as the '''KD11-HA''') is the later version of the [[LSI-11]]. It contains only the [[Central Processing Unit|CPU]], and nothing else; it is otherwise identical in functionality to the LSI-11, including the use of ODT, rather than the up-to-then conventional [[front panel]]
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The '''LSI-11/2''' (also known as the '''KD11-HA''') is the later version of the [[LSI-11]]. It contains only the [[Central Processing Unit|CPU]], and nothing else; it is otherwise identical in functionality to the LSI-11, including the use of ODT, rather than the up-to-then conventional [[front panel]], and it has the same [[QBUS]] limitations as the LSI-11.
  
It is a [[DEC card form factor|dual]] board (M7270), using the [[LSI-11 chip set‎]], and supports all the same options as the LSI-11.
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It is a [[DEC card form factor|dual]] board (M7270), using the same [[LSI-11 chip set‎]]; it supports all the same options as the LSI-11. .
  
 
These include the [[KEV11-A floating point|KEV11-A]], for the [[PDP-11 Extended Instruction Set|EIS]]/[[FIS floating point|FIS]] instructions; the [[KEV11-B Extended Instruction Set|KEV11-B]], which provides EIS without FIS; and the [[KEV11-C Commercial Instruction Set‎|KEV11-C]], which provides a subset of the PDP-11 [[PDP-11 Commercial Instruction Set|CIS]] (it also apparently includes the EIS, but not the FIS).
 
These include the [[KEV11-A floating point|KEV11-A]], for the [[PDP-11 Extended Instruction Set|EIS]]/[[FIS floating point|FIS]] instructions; the [[KEV11-B Extended Instruction Set|KEV11-B]], which provides EIS without FIS; and the [[KEV11-C Commercial Instruction Set‎|KEV11-C]], which provides a subset of the PDP-11 [[PDP-11 Commercial Instruction Set|CIS]] (it also apparently includes the EIS, but not the FIS).

Revision as of 13:48, 22 May 2019

LSI-11/2 card

The LSI-11/2 (also known as the KD11-HA) is the later version of the LSI-11. It contains only the CPU, and nothing else; it is otherwise identical in functionality to the LSI-11, including the use of ODT, rather than the up-to-then conventional front panel, and it has the same QBUS limitations as the LSI-11.

It is a dual board (M7270), using the same LSI-11 chip set‎; it supports all the same options as the LSI-11. .

These include the KEV11-A, for the EIS/FIS instructions; the KEV11-B, which provides EIS without FIS; and the KEV11-C, which provides a subset of the PDP-11 CIS (it also apparently includes the EIS, but not the FIS).

The KD11-NA is an LSI-11/2 with the KEV11-A pre-installed.

The LSI-11/2 likely also supported the optional KUV11 Writeable Control Store.

Note: The image in the "Microcomputer Products Handbook" (pg. C-18) is erroneous; the order of the chips (from the handle end) is, in fact, KEV11, Control, uROM 1, uROM 0, Data Path (per the KD11-HA print set); the order given in the Handbook is that for the LSI-11 (no doubt an image was re-used without checking).

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