Path: utzoo!mnetor!uunet!husc6!bbn!rochester!ur-tut!sunybcs!bingvaxu!leah!itsgw!imagine!pawl15.pawl.rpi.edu!jesup
From: jesup@pawl15.pawl.rpi.edu (Randell E. Jesup)
Newsgroups: comp.arch
Subject: Re: negative addresses
Message-ID: <880@imagine.PAWL.RPI.EDU>
Date: 11 May 88 05:58:41 GMT
References: <2393@uvacs.CS.VIRGINIA.EDU> <10769@steinmetz.ge.com>
Sender: news@imagine.PAWL.RPI.EDU
Reply-To: jesup@pawl15.pawl.rpi.edu (Randell E. Jesup)
Organization: RPI Public Access Workstation Lab - Troy, NY
Lines: 15

>In article <2393@uvacs.CS.VIRGINIA.EDU> wulf@uvacs.CS.VIRGINIA.EDU (Bill Wulf) writes:
>| Has anyone ever seen a machine with "negative addresses", that is, one
>| where the address space is -2**31..2**31-1 rather than 0..2*32-1??
>| Any thoughts on what the problems with such a scheme might be (or are)?

>| Bill Wulf

	The rpm-40 has negative addressing.  (-2**N..2**N-1, where 2**(N+1) is
the process instruction or data space size.

     //	Randell Jesup			      Lunge Software Development
    //	Dedicated Amiga Programmer            13 Frear Ave, Troy, NY 12180
 \\//	beowulf!lunge!jesup@steinmetz.UUCP    (518) 272-2942
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(-: The Few, The Proud, The Architects of the RPM40 40MIPS CMOS Micro :-)