Path: utzoo!attcan!uunet!portal!cup.portal.com!Bruce_Eric_Bowers
From: Bruce_Eric_Bowers@cup.portal.com
Newsgroups: comp.sys.amiga
Subject: A1000 Bus Noise / Power Consumption
Message-ID: <14999@cup.portal.com>
Date: 24 Feb 89 04:06:48 GMT
Organization: The Portal System (TM)
Lines: 29


I recently purchased a used CLtd SCSI controller and hard drive for my
Amiga 1000. I also have a StarBoard 2 with 2M. 

Whenever I have both the StarBoard and the controller installed, my
system crashes frequently (every few minutes). The controller without the
StarBoard, or the StarBoard without the controller, seems to work OK.
When I got my Starboard a year or two ago, I had to ground the chips
on my daughterboard to reduce bus noise and keep the system from crashing.
I think that with the additional device on the expansion bus, I need to
do something more. I have three questions:

  1) There is some other modification I have heard of somewhere, which
     (I think) involves putting filter capacitors on the power lines 
     of the expansion bus to further reduce bus noise. Does anyone know
     the specifics? What size capacitors, connected how? I am not very
     comfortable making hardware changes without very specific
     instructions.

  2) Is it possible that instead of bus noise, power consumption is my
     problem? The controller pull 450 ma. I don't know how much the
     StarBoard pulls.

  3) Does anyone out there in net-land have both a StarBoard 2 and a 
     CLtd controller working on an A1000?

Thanks for any help and advice you can give me.

Bruce Bowers