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From: msf@rotary.Central.Sun.COM (Mike Fischbein)
Newsgroups: comp.arch
Subject: Re: Is handling off-alignment impor
Message-ID: <2410@east.East.Sun.COM>
Date: 15 Aug 90 19:26:54 GMT
References: <40711@mips.mips.COM> <3300155@m.cs.uiuc.edu> <2458@dino.cs.iastate.edu>
Sender: news@east.East.Sun.COM
Organization: Sun Microsystems, Mt. View, Ca.
Lines: 22

In article <2458@dino.cs.iastate.edu> hascall@cs.iastate.edu (John Hascall) writes:
>In article <3300155@m.cs.uiuc.edu> marick@m.cs.uiuc.edu writes:
>
>}The Gould Powernode machines had 32 bit words, 24 bit addresses.  The
>}top 8 bits were ignored.  In our Lisp, we put the tag bits there.
>}Again, there was no need to mask before dereferences.  The tag bits...
>
>    As someone who went through a conversion from MVS to MVS/XA I find
>this perfectly horrible.

You don't need to wait; the Gould NP line had a lot of compatability
with the Powernodes; but they did use all 32 bits of address.

Has anyone mentioned GNU Emacs using high order address bits yet?

		mike

--
Michael Fischbein,  Technical Consultant, Sun Professional Services
Sun Albany, NY  518-783-9613  sunbow!msf or mfischbein@east.sun.com
These are my opinions and not necessarily those of any other person
or organization.                                    Save the skeet!