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From: tim@amdcad.AMD.COM (Tim Olson)
Newsgroups: comp.arch
Subject: Re: Was the 360 badly-designed?  (was Re: Compatibility with EBCDIC)
Message-ID: <18102@amdcad.AMD.COM>
Date: Thu, 27-Aug-87 12:08:27 EDT
Article-I.D.: amdcad.18102
Posted: Thu Aug 27 12:08:27 1987
Date-Received: Sat, 29-Aug-87 09:56:43 EDT
References: <1486@cullvax.UUCP> <114@spook.UUCP>
Reply-To: tim@amdcad.UUCP (Tim Olson)
Organization: Advanced Micro Devices
Lines: 21

In article <114@spook.UUCP> hank@masscomp.UUCP (Hank Cohen) writes:
+-----
| 	 Another provision of the system architecture that is  overlooked 
| in all micro systems that I have seen is error logging and diagnosis.
| In this age of super fast micro processors and very large scale
| integration none of the new RISC chips have thought it prudent to
| provide architectural support for fault detection and diagnosis.  At
| least if such support has been provided it has not been made evident
| from the discussion in this group.  I think that there are mistaken
| priorities at work when speed of computation is persued to the
| detriment of correctness.
+-----

The Am29000 has Master/Slave mode operation, where two processors
operate in lock-step.  The Slave processor checks all of the master's
outputs against the slave's internal values cycle by cycle, and signals
an error (MSERR) if there is a discrepency in any value.

	-- Tim Olson
	Advanced Micro Devices
	(tim@amdcad.amd.com)