Re: Parity hardware for uninitialized variable checking?

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Article #2096

#2096

From: Barry Traylor
Date: Sun, 03 Sep 1989 04:37

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On Unisys A Series systems (formerly Burroughs B5/6/7000 series), all words
have tags.  These tags are not part of the data portion of the word;
different tags have different uses.  One of the tag enumerations is 6.  
With this tag, all non-privleged load operations fault and all non-privileged 
store operations complete OK.  Some, but certainly not all of the A Series 
languages take advantage of this feature.

Barry Traylor (standard disclaimer: opinions, policies, etc.)
Unisys A Series Engineering, Tredyffrin, Pa.

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Message-ID: <11347@burdvax.PRC.Unisys.COM>

Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!rochester!udel!burdvax!barry

References: <12.filbo@gorn.santa-cruz.ca.us> <4322@druhi.ATT.COM> <14166@polyslo.CalPoly.EDU>

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!rochester!udel!burdvax!barry
From: barry@PRC.Unisys.COM (Barry Traylor)
Newsgroups: comp.arch
Subject: Re: Parity hardware for uninitialized variable checking?
Message-ID: <11347@burdvax.PRC.Unisys.COM>
Date: 3 Sep 89 04:37:39 GMT
References: <12.filbo@gorn.santa-cruz.ca.us> <4322@druhi.ATT.COM> <14166@polyslo.CalPoly.EDU>
Followup-To: comp.arch
Distribution: usa
Organization: Unisys Corporation, Paoli Research Center; Paoli, PA
Lines: 9
Keywords: tags, A Series
Summary: Parity not needed on A Series

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