Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!agate!bionet!csd4.milw.wisc.edu!trantow
From: trantow@csd4.milw.wisc.edu (Jerry J Trantow)
Newsgroups: comp.sys.amiga.tech
Subject: Bus Termination
Summary: What's the Scoop
Message-ID: <2487@csd4.milw.wisc.edu>
Date: 11 May 89 13:45:41 GMT
Sender: news@csd4.milw.wisc.edu
Reply-To: trantow@csd4.milw.wisc.edu (Jerry J Trantow)
Organization: University of Wisconsin-Milwaukee
Lines: 19

Line Eater fodder

Well, my wife has finished her paper and it is finally safe for me to 
reinstall the LUCAS board.  I had my board working for a few months when
it decided to get flakey after warming up.  Now I am ready to try again.
I decided to add the legendary bus termination fix and I have come up 
with a few questions.  The fix that has been suggested uses a 1K,4.7K, and
0.001 uF.  Someone also suggested using a 3.3K instead of the 4.7K, and 
a variable pot was also mentioned.  To clear up the confusion, I dug up
my A1000 schematics.  The expansion board that is shown in the schematics
shows a 220 and 330 ohm bus termination with no capacitor on the data/address
lines and a capacitor on the Clock lines.  

So what is the scoop.  Is the capacitor really needed?  Should I put Rs on
the address, data, and control lines?

By the way, when I first looked at this I thought it would really be a pain.
I had not realized that they make 10 pin SIPs that have the termination 
network (Rs) all set up.