Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!spool.mu.edu!cs.umn.edu!uc!shamash!timbuk!marc
From: marc@sequoia.cray.com (Marc Bouron)
Newsgroups: comp.sys.atari.st.tech
Subject: Re: Host Adapters, Hard Drives
Message-ID: <035547.6739@timbuk.cray.com>
Date: 10 Apr 91 15:02:52 GMT
References: <1991Apr4.214458.26393@unicorn.cc.wwu.edu> <18420011@hpsad.HP.COM>
Reply-To: marc@sequoia.cray.com (Marc Bouron)
Organization: Cray Research, Inc.
Lines: 29


In article <18420011@hpsad.HP.COM>, bobw@hpsad.HP.COM (Bob Waltenspiel) writes:
|> In comp.sys.atari.st.tech, marc@sequoia.cray.com (Marc Bouron) writes:
|> >  Finally, make sure you don't
|> >get bitten by the `famous' (apparently) ICD DMA noise problem - I did :-) 
|> 
|> Can you (or someone) please post a description of this problem?

I posted a query a few weeks back which described a problem with my new HD.
The video display appeared to lose sync (i.e. go haywire) intermittently.  I was
told by fellow netters that this was due to `noise' generated by the ICD host
adaptor, which was interfering with the video circuitry.  

This is a known problem at ICD.  Apparently they either ship you a different
DMA cable, or suggest connecting a 22pF capacitor across pins 12 and 13 of the
DMA IN connector.

Seasoned netters: please flame if I've misunderstood any of this :-)

[M][a][r][c]


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