Re: Update: Help needed with a 6809 Pod Problem, 9010A

From: David Fish <dfish_1_at_comcast.net>
Date: Tue Feb 22 2005 - 05:20:15 EST

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<DIV><FONT face=Arial size=2>Mark,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>&nbsp;My schematic shows s1-3 and s1-2 with one
side of each connected together and to the input pin 4 of AND gate U16. The
other side of S1-3 goes to the output side of the tri-state buffer U10 pin 8.
The other pin of S1-2 goes to the input side of the same buffer U10 pin
9.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>I'll bring the manual to work and scan the
schematic sheets. I'll try to get them off to you tonight. What's your email
address?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>Dave</FONT></DIV></FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV
  style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
  <A title=markhooks@earthlink.net href="mailto:markhooks@earthlink.net">Mark
  Hooks</A> </DIV>
  <DIV style="FONT: 10pt arial"><B>To:</B> <A title=Techtoolslist@flippers.com
  href="mailto:Techtoolslist@flippers.com">Techtoolslist</A> </DIV>
  <DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, February 21, 2005 9:09
  PM</DIV>
  <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Techtoolslist] Update: Help
  needed with a 6809 Pod Problem, 9010A</DIV>
  <DIV><BR></DIV>
  <DIV><FONT face=Arial size=2>Upon further examination it appears that dip
  switches 2 and 3 (the ones that switch&nbsp;over&nbsp;from&nbsp;the 6809
  versus the 6809E) are not connected to anything.&nbsp; I wonder if there was a
  re-design of the pod during production?&nbsp; My boards have a 1982 date on
  them, revision B-1.</FONT></DIV>
  <DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
  <DIV><FONT face=Arial size=2>Mark Hooks</FONT></DIV>
  <BLOCKQUOTE
  style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
    <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
    <DIV
    style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
    <A title=markhooks@earthlink.net href="mailto:markhooks@earthlink.net">Mark
    Hooks</A> </DIV>
    <DIV style="FONT: 10pt arial"><B>To:</B> <A title=Techtoolslist@flippers.com
    href="mailto:Techtoolslist@flippers.com">Techtoolslist</A> </DIV>
    <DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, February 21, 2005 8:33
    PM</DIV>
    <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Techtoolslist] Update:
    Help needed with a 6809 Pod Problem, 9010A</DIV>
    <DIV><BR></DIV>
    <DIV><FONT face=Arial size=2>I've made some progress on this problem.&nbsp;
    I've manage to track down a bad diode at CR1.&nbsp; I now get the input on
    EXTAL through U22 as it should.&nbsp; I'm still getting the pod timeout
    -attempting reset error though. It seems I'm not getting the E clock signal
    at pin 34.</FONT></DIV>
    <DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
    <DIV><FONT face=Arial size=2>I've been comparing the schematics to my unit
    and they don't match. Is there more than one schematic available?&nbsp; The
    one I have is the October 1982 version. I hate working blind without
    schematics.</FONT></DIV>
    <DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
    <DIV><FONT face=Arial size=2>Mark Hooks</FONT></DIV>
    <BLOCKQUOTE
    style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
      <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
      <DIV
      style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
      <A title=markhooks@earthlink.net
      href="mailto:markhooks@earthlink.net">Mark Hooks</A> </DIV>
      <DIV style="FONT: 10pt arial"><B>To:</B> <A
      title=Techtoolslist@flippers.com
      href="mailto:Techtoolslist@flippers.com">Techtoolslist</A> </DIV>
      <DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, February 13, 2005 8:04
      PM</DIV>
      <DIV style="FONT: 10pt arial"><B>Subject:</B> [Techtoolslist] Help needed
      with a 6809 Pod Problem, 9010A</DIV>
      <DIV><BR></DIV>
      <DIV><FONT face=Arial size=2>I'm at an impasse trying to fix
      my&nbsp;broken 6809 pod. I've scoured the techtoolslist archive and have
      not found a solution. I'm getting the pod timeout -attempting reset error
      message&nbsp;when using a 6809E processor.&nbsp; Here's what I know:&nbsp;
      the pod works fine with a regular 6809, the dip switches are set right for
      the 6809E, the 6809E processor I'm using works fine in a working star wars
      board, the&nbsp;clock source at the input to U22 looks good on the scope,
      the U22 enable line is high,but the u22 output is stuck low. Therefore,
      there is no input on the processor EXTAL.&nbsp; </FONT></DIV>
      <DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
      <DIV><FONT face=Arial size=2>I think this is the problem.&nbsp; Where do I
      go from here, replace U22?&nbsp; Before I go hacking around on a rare pod,
      I want to make sure I'm on the right track.</FONT></DIV>
      <DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
      <DIV><FONT face=Arial size=2>Mark Hooks<BR>A.K.A.
      Pinmania<BR>850-894-8103</FONT></DIV>
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Received on Tue Feb 22 02:26:01 2005

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