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<DIV><SPAN class=161173600-27032003><FONT face=Verdana color=#800000
size=2>Actually.... I was wondering about that. Right now I am using a Tek 465
with my 9010A. Is it worth finding a probe? Most of what I am looking at, I can
observe with my scope just fine. (Sometimes it's hard for me to see a very quick
pulse, like a R/!W line)</FONT></SPAN></DIV>
<DIV><SPAN class=161173600-27032003><FONT face=Verdana color=#800000
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=161173600-27032003><FONT face=Verdana color=#800000 size=2>Just
wondering. </FONT></SPAN></DIV>
<DIV><SPAN class=161173600-27032003><FONT face=Verdana color=#800000
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=161173600-27032003><FONT face=Verdana color=#800000
size=2>JB</FONT></SPAN></DIV>
<DIV><SPAN class=161173600-27032003><FONT face=Verdana color=#800000
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=161173600-27032003><!-- Converted from text/plain format -->
<P><FONT size=2>--James Bright<BR>www.QuarterArcade.com<BR>Restored Arcade Games
for your Home<BR></FONT></P></SPAN></DIV>
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<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B>
owner-techtoolslist@www.flippers.com
[mailto:owner-techtoolslist@www.flippers.com] <B>On Behalf Of </B>John
Robertson<BR><B>Sent:</B> Wednesday, March 26, 2003 6:05 PM<BR><B>To:</B>
techtoolslist@flippers.com<BR><B>Subject:</B> Re: Issues with the
9010A<BR><BR></FONT></DIV>Oh, the perils of working when overtired....I looked
at this fresh this morning and found the problem was a short between A7 and
(inverse)A9! This would not show up as a BUSS fault...<BR><BR>So when you get
a floating Address line, look for shorts between it and something else. My
logic probe did not identify this as a short as well....only when I had the
probe Synched to Address or Data could I identify the problem - so another
argument for finding a probe for your 9010A!<BR><BR>John :-#)#<BR><BR><BR>
<BLOCKQUOTE class=cite cite="" type="cite">Updated slightly as per some
questions raised in email...<BR><BR>I was tinkering around with a sick Bally
MPU board today (a rewired -17 monster for Grand Products 301), and was
trying to figure out why the 6810 was not being selected...So I set the
probe to <I><U>SYNC to</U></I> DATA <I><U>(or ADDRESS)</U>,</I> and set a
WRITE @ 0000 = 55 <I><U>(LOOPING)</U></I>, and then tried checking with the
<I><U>9010A's</U></I> probe for results. Curiously enough, the
<I><U>Synched</U></I> probe showed nothing at all for A7 - Tri-State as far
as it was concerned. I though maybe the 6800 pod was defective and pulled
out another one, same result. A regular logic probe shows everything active.
<I>Need to dig out the scope next I guess...<BR><BR></I>The 6810 RAM should
have been available from 0000h to 007Fh, but it was invisible. The 6810 is
good, as is the socket and wiring...curious... shall dig around more
tomorrow when had more sleep and let you folks know the results.<BR><BR>A
FAQ on the 9010A might be in order at some
point...<BR><BR>Suggestions?<BR><BR>John :-#)#<BR><BR>How to subscribe or
unsubscribe from TTL<BR><BR>To do either you send email to
"MajorDomo@flippers.com" and in the body you state either "Subscribe
techtoolslist" or "Unsubscribe techtoolslist", note that the Subject is ""
(Blank)...<BR><BR>FTP site is: <A href="ftp://ftp.flippers.com/TTL/"
eudora="autourl">ftp://ftp.flippers.com/TTL/</A>
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Received on Wed Mar 26 17:02:17 2003
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