Newsgroups: comp.arch
Path: utzoo!henry
From: henry@zoo.toronto.edu (Henry Spencer)
Subject: loadable control store, an idea whose time has gone
Message-ID: <1990Nov1.044515.19557@zoo.toronto.edu>
Organization: U of Toronto Zoology
References: <1536@ftc.framentec.fr> <1990Oct19.120218.9450@canterbury.ac.nz> <15497@hydra.gatech.EDU> <2176@lupine.NCD.COM> <42310@mips.mips.COM> <PCG.90Oct28162504@teachh.cs.aber.ac.uk> <42488@mips.mips.COM> <PCG.90Oct30191923@teachk.cs.aber.ac.uk> <2817@crdos1.crd.ge.COM>
Date: Thu, 1 Nov 90 04:45:15 GMT

In article <2817@crdos1.crd.ge.COM> davidsen@crdos1.crd.ge.com (bill davidsen) writes:
>  Loadable control store is a great idea, and can really improve the
>performance of a program...

Well, if you're using a microprogrammed CPU with a control store in the
first place.  Nobody in his right mind designs a high-performance system
that way any more, given a choice.  You improve the performance of the
program even more by going to a RISC CPU which has a cache instead of
a control store and runs user code at one instruction per cycle.
-- 
"I don't *want* to be normal!"         | Henry Spencer at U of Toronto Zoology
"Not to worry."                        |  henry@zoo.toronto.edu   utzoo!henry