🚀 go-pugleaf

In article <670@brl-sem.ARPA> ron@brl-sem.ARPA (Ron Natalie <ron>) writes:
>In article <542@houxv.UUCP>, rdt@houxv.UUCP (R.TRAUBEN) writes:
> >  	Could anyone share with us how the CPU hardware and operating
> > 	system coordinate their response to a faulted copyback midway
> > 	thru an exchange jump?
> > 
>Easy, first, the machines don't page.
>Second, use better error correction, parity is for farmers.

The CDC 6000's (e.g. 6600), 7600, Cyber 70's, and 170's don't page.

The CDC Cyber 205 pages.

The 205 has virtual memory (with 2 page sizes: small pages with 512, 2048,
or 8192 words (small page size selectable) and large pages with 64K words),
(words are 64 bits), and is generally, except for the memory-to-memory vector
instructions which are microprogrammed, a somewhat RISCy machine.
The Cyber 205 is a completely different architecture from the
older Cybers.


  Hugh LaMaster, m/s 233-9,  UUCP {seismo,topaz,lll-crg,ucbvax}!
  NASA Ames Research Center                ames!pioneer!lamaster
  Moffett Field, CA 94035    ARPA lamaster@ames-pioneer.arpa
  Phone:  (415)694-6117      ARPA lamaster@pioneer.arc.nasa.gov

"In order to promise genuine progress, the acronym RISC should stand 
for REGULAR (not reduced) instruction set computer." - Wirth

("Any opinions expressed herein are solely the responsibility of the
author and do not represent the opinions of NASA or the U.S. Government")