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Article #3860Re: Info on 11/83 versus 11/84 memory boards wanted.
From: Terry Kennedy, Operations Mgr.
Date: Mon, 23 Nov 1992 06:54
Date: Mon, 23 Nov 1992 06:54
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In article <1992Nov22.205247.14453@decus.com.au>, geremin@decus.com.au writes: > Q. What is different between 11/84 memory and 11/83 memory. The -JB and -JC's had a design problem in one of the gate arrays. This made them croak (that's a technical term 8-) if some sort of memory cycle happened. I believe it was block mode transfers. I further recall that -JB's and -JC's could be used in the 11/x4 CPU's, since the bus perverter didn't generate such cycles, but if you used them in an 11/x3 system, you would wedge the machine/corrupt memory contents. Of course, all of this is being recalled from some brain cells which were placed into service be- fore ECC logic was available, so check the manuals 8-) > Regards, John G. (e-mail replies preferred) Posted as well as mailed. Terry Kennedy Operations Manager, Academic Computing terry@spcvxa.bitnet St. Peter's College, Jersey City, NJ USA terry@spcvxa.spc.edu +1 201 915 9381
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Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!sgigate!rutgers!spcvxb!terry From: terry@spcvxb.spc.edu (Terry Kennedy, Operations Mgr.) Newsgroups: comp.sys.dec,vmsnet.pdp-11,decus.pdp11 Subject: Re: Info on 11/83 versus 11/84 memory boards wanted. Message-ID: <1992Nov23.015413.4498@spcvxb.spc.edu> Date: 23 Nov 92 06:54:13 GMT References: <1992Nov22.205247.14453@decus.com.au> Organization: St. Peter's College, US Lines: 19