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From: jans@tekecs.UUCP (Jan Steinman)
Newsgroups: net.arch
Subject: Re: Addressing modes
Message-ID: <5960@tekecs.UUCP>
Date: Wed, 19-Feb-86 13:15:40 EST
Article-I.D.: tekecs.5960
Posted: Wed Feb 19 13:15:40 1986
Date-Received: Fri, 21-Feb-86 05:36:23 EST
References: <946@garfield.UUCP> <3421@nsc.UUCP> <1404@gitpyr.UUCP> <175@oasys.UUCP> <177@gvax.cs.cornell.edu>
Reply-To: jans@tekecs.UUCP (Jan Steinman)
Organization: Tektronix, Wilsonville OR
Lines: 15

In article <175@oasys.UUCP> maa@oasys.UUCP writes:
>
>This computer supported infinate inderection with indexing at every level.  
>I think it's a shame that all these wondedful old computers with strange
>architectures are being retired.

Look at Tandem computers.  These are still being made (indeed, Tandem holds
over 80% of the fault-tolerant transaction processing market) and they feature
an "indirect bit" which, if set, says "I'm an address, not data.  Tandem does
not support an assembler, so it is unlikely that infinite indirection will
occur, unless memory gets clobbered somehow.

:::::: Artificial   Intelligence   Machines   ---   Smalltalk   Project ::::::
:::::: Jan Steinman		Box 1000, MS 60-405	(w)503/685-2956 ::::::
:::::: tektronix!tekecs!jans	Wilsonville, OR 97070	(h)503/657-7703 ::::::