Re: 6.270 Boards -- be careful before deciding

Article View: comp.robotics

Article #1837

#1837

From: Paul Malenfant
Date: Wed, 20 Jan 1993 22:39

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In article <1jc2p1INN903@life.ai.mit.edu>, anarch@cookie-monster.ai.mit.edu (Anne R Wright) writes:
|> 
|> All revisions of the 6.270 board that we have tested -- version 
|> 2.0, 2.1, and 2.2 -- all fail when using the Motorola 68HC11A1 
|> chips currently available.  6.270 has traditionally used A0 rather
|> than A1 chips and they work fine.  However, the new chips will 
|> frequently enter an illegal state on reset which causes the 
|> 6811 to corrupt its own memory.

The corruption to which you refer is of the internal RAM, not the
external, correct?

When does the failure occur?  Upon pressing reset?

Does the reset function correctly, with the exception of RAM
corruption?

-- 

Paul Malenfant
pmalenfa @ kitkat.webo.dg.com (508-870-6460)

Technical Details

Message-ID: <1993Jan20.223957.4621@webo.dg.com>

Path: arc1-ca.pugleaf.net!sparky!uunet!psinntp!dg-rtp!webo!kitkat!pmalenfa

References: <1993Jan17.075322.10766@magnus.acs.ohio-state.edu> <1jc2p1INN903@life.ai.mit.edu>

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Newsgroups: comp.robotics
Path: arc1-ca.pugleaf.net!sparky!uunet!psinntp!dg-rtp!webo!kitkat!pmalenfa
From: pmalenfa@kitkat.webo.dg.com (Paul Malenfant)
Subject: Re: 6.270 Boards -- be careful before deciding
Sender: usenet@webo.dg.com (Usenet Administration)
Message-ID: <1993Jan20.223957.4621@webo.dg.com>
Date: Wed, 20 Jan 93 22:39:57 GMT
Reply-To: pmalenfa@kitkat.webo.dg.com (Paul Malenfant)
References: <1993Jan17.075322.10766@magnus.acs.ohio-state.edu> <1jc2p1INN903@life.ai.mit.edu>
Organization: Data General Corporation, Westboro, MA
Keywords: control robot miniboard pcb 6.270
Lines: 21

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