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From: dave@sdeggo.UUCP (David L. Smith)
Newsgroups: comp.arch,comp.unix.wizards,comp.os.minix
Subject: Re: pdp-11/55
Message-ID: <111@sdeggo.UUCP>
Date: Thu, 8-Oct-87 10:54:38 EDT
Article-I.D.: sdeggo.111
Posted: Thu Oct  8 10:54:38 1987
Date-Received: Sun, 11-Oct-87 08:42:33 EDT
References: <1755@ncr-sd.SanDiego.NCR.COM> <275@usl> <29933@sun.uucp> <72@bacchus.DEC.COM>
Organization: Lazy Programmer's Society of San Diego
Lines: 19
Xref: mnetor comp.arch:2561 comp.unix.wizards:4772 comp.os.minix:1838

In article <72@bacchus.DEC.COM>, kent@decwrl.dec.com (Christopher A. Kent) writes:
 > A very large difference between the 11/60 and 11/70 was that the 11/70
 > had split instruction and data spaces. So operating systems that knew how
 > to make use of this feature (that is, Unix) could run much larger programs.
 > 
 > The 11/45 was the only other 11 to have this feature. DEC never produced an
 > operating system that took advantage of it, because EVERYTHING was supposed
 > to be able to run on the least common denominator hardware. 

Well, as of 1982 or thereabouts you could build a split I&D kernel and I
believe that you could specify it when you linked (TKB'd) a program.  Ah,
nostalgia...


-- 
David L. Smith
{sdcsvax!amos,ihnp4!jack!man, hp-sdd!crash, pyramid}!sdeggo!dave
sdeggo!dave@amos.ucsd.edu 
"How can you tell when our network president is lying?  His lips move."