Newsgroups: comp.arch
Path: utzoo!henry
From: henry@zoo.toronto.edu (Henry Spencer)
Subject: Re: Multiprogramming the Microcode: The B1700
Message-ID: <1990Oct19.163026.24784@zoo.toronto.edu>
Organization: U of Toronto Zoology
References: <1990Oct4.001346.4139@Stardent.COM> <8052@scolex.sco.COM> <2926@sequent.cs.qmw.ac.uk> <1990Oct11.164904.12550@zoo.toronto.edu> <27843@bellcore.bellcore.com> <1990Oct14.001905.19442@zoo.toronto.edu> <6120@omepd.UUCP>
Date: Fri, 19 Oct 90 16:30:26 GMT

In article <6120@omepd.UUCP> colwell@mipon2.intel.com (Robert Colwell) writes:
>>the Alto's multiple microcontexts...
>>The Dorado, and perhaps
>>some of the other Xerox D-machines, copied this approach, but nobody else
>>has that I'm aware of.
>
>Alas, the world has already forgotten the Three Rivers Computer Perq...

I assure you I haven't, since I wrote much of a compiler for it for my
MSc thesis...  I don't recall the Perq having multiple microcontexts,
actually, although I may have just forgotten the details.  It's been a
long time, and dealing with that architecture was not fun...
-- 
The type syntax for C is essentially   | Henry Spencer at U of Toronto Zoology
unparsable.             --Rob Pike     |  henry@zoo.toronto.edu   utzoo!henry