Xref: utzoo comp.sys.dec:939 comp.arch:7888
Path: utzoo!attcan!uunet!lll-winken!ames!mailrus!sharkey!atanasoff!hascall
From: hascall@atanasoff.cs.iastate.edu (John Hascall)
Newsgroups: comp.sys.dec,comp.arch
Subject: Re: DECstation 3100 info.
Message-ID: <672@atanasoff.cs.iastate.edu>
Date: 17 Jan 89 15:08:09 GMT
References: <979@isieng.UUCP> <85330@sun.uucp> <13508@jumbo.dec.com> <1989Jan17.042349.5379@utzoo.uucp>
Reply-To: hascall@atanasoff.cs.iastate.edu (John Hascall)
Organization: Iowa State U. Computer Science Department, Ames, IA
Lines: 16

In article <1989Jan17.042349.5379@utzoo.uucp> henry@utzoo.uucp (Henry Spencer) writes:
>In article <13508@jumbo.dec.com> jg@jumbo.UUCP (Jim Gettys) writes:
>>Digital has produced 6 additional implementations of the same VAX
>>architecture, fully binary compatible with each other, to go along with
>>the three which precedes Sun's existance...

>Well, "fully" if you discount the mishmash of four or five different
>floating-point formats,	not all of which exist on all VAXen last I heard...

   While they may not all exist in hardware on all VAXen, those that don't have
   the hardware emulate them in software--so they are there (although maybe
   slower).  This is also true for some of the more esoteric/less used
   instructions.

   John Hascall
   ISU Comp Center