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

pbirkel at gmail.com pbirkel at gmail.com
Wed Dec 1 16:27:35 AEST 2021


Said Jon:

" In a microcoded machine, the same hardware is used for every
microinstruction.  In random logic, custom designed circuitry is used for
each special case."

Best way to get a handle on the distinction is to read up on the originator
of the concept, Maurice Wilkes:

https://en.wikipedia.org/wiki/Maurice_Wilkes
https://amturing.acm.org/info/wilkes_1001395.cfm

The original paper:

http://www.cs.princeton.edu/courses/archive/fall09/cos375/BestWay.pdf

"The Best Way to Design an Automatic Calculating Machine" (1951)

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