* [pups] Unix and PDP11/20 (was PDP-9?)
@ 2002-09-02 2:19 John Holden
2002-09-02 3:49 ` Warren Toomey
0 siblings, 1 reply; 2+ messages in thread
From: John Holden @ 2002-09-02 2:19 UTC (permalink / raw)
Early editions of Unix did run on a PDP11/20, written in assembly language.
There was a memory mapping option KS-11 that sat between the processor and
Unibus that mapped chunks of memory. It was a DEC special, and only about a
dozen were built. See http://cm.bell-labs.com/cm/cs/who/dmr/odd.html
A hardware story'
^ permalink raw reply [flat|nested] 2+ messages in thread
* [pups] Unix and PDP11/20 (was PDP-9?)
2002-09-02 2:19 [pups] Unix and PDP11/20 (was PDP-9?) John Holden
@ 2002-09-02 3:49 ` Warren Toomey
0 siblings, 0 replies; 2+ messages in thread
From: Warren Toomey @ 2002-09-02 3:49 UTC (permalink / raw)
In article by John Holden:
> Early editions of Unix did run on a PDP11/20, written in assembly language.
Also see http://cm.bell-labs.com/cm/cs/who/dmr/picture.html
for a picture of Ken & Dennis sitting in front of their 11/20.
Warren
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