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 \/ (uunet!steinmetz!beowulf!lunge!jesup) BIX: rjesup (-: The Few, The Proud, The Architects of the RPM40 40MIPS CMOS Micro :-)