[TUHS] Encoding an ISA: Random Logic vs. Control Stores

[Ron Natalie]

Indeed, the early PDPs (10/15/20) had no microprogramming at all.   Even 
the early microprogrammed ones used "random logic" to implement that.    
It would take ten years before large scale integration took over.    The 
PDP-11/44 in 1979 was the last of the discrete logic CPUs.


------ Original Message ------
From: pbirkel at gmail.com
To: "'TUHS main list'" <tuhs at minnie.tuhs.org>
Cc: "'Eugene Miya'" <eugene at soe.ucsc.edu>
Sent: 11/30/2021 3:07:15 AM
Subject: [TUHS] Encoding an ISA: Random Logic vs. Control Stores

>I believe that the PDP-11 ISA was defined at a time when DEC was still using
>random logic rather than a control stor