Article View: comp.arch
Article #2142Re: Parity in Internal Data Paths of Processors
From: Barry Traylor
Date: Fri, 08 Sep 1989 04:53
Date: Fri, 08 Sep 1989 04:53
15 lines
1163 bytes
1163 bytes
In article <124311@sun.Eng.Sun.COM> kum@sccmts.Sun.COM (Kumar Venkatasubramaniam) writes: > ... >Are there large systems (mainframes, supercomputers) that >perform additional parity checks internally and under what >conditions? ... The Unisys large A Series (A12/15/17) uses either parity or mod 3 residue on not only data paths, but the results of alu operations. Very few data paths are not protected. Residue is used wherever possible and practical. In addition to the processor error checking, the processor will report a "proc internal" error to software, which will attempt a single retry of the instruction that discovered the error. Barry Traylor Unisys A Series Engineering
Technical Details
Message-ID:
<11398@burdvax.PRC.Unisys.COM>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!haven!udel!burdvax!barryReferences:
<124311@sun.Eng.Sun.COM>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!haven!udel!burdvax!barry From: barry@PRC.Unisys.COM (Barry Traylor) Newsgroups: comp.arch Subject: Re: Parity in Internal Data Paths of Processors Keywords: parity, error detection Message-ID: <11398@burdvax.PRC.Unisys.COM> Date: 8 Sep 89 04:53:44 GMT References: <124311@sun.Eng.Sun.COM> Followup-To: comp.arch Organization: Unisys Corporation, Paoli Research Center; Paoli, PA Lines: 15