<x-html><!x-stuff-for-pete base="" src="" id="0" charset=""><html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<style>
<!--
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:Arial;
color:windowtext;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><font size=2 face="Times New Roman"><span style='font-size:
10.0pt'>I have a Pac with a low 6M* line, when I piggyback a 74LS86 (IIRC,
whatever <br>
chip generates that signal) on it, it's fine, but taking it off, the game <br>
'bogs down', sometimes, but plays with no glitches but somtimes the music <br>
slows down speeds up, etc. Looks like low TTL levels measured at Pin 1 on <br>
the z80 sync buss card. When I say piggyback, I put my logic comparator on <br>
it and it raises the levels by about .4V<br>
<br>
Do folks just slap some HC chips in the circuit or is there a better classic <br>
way to fix this? Course I could just solder a duplicate chip on top I guess. <br>
I suppose something else tied to that line may be pulling it down but I <br>
haven't gotten that far yet. Replacing the crappy sync buss single wipe <br>
socket may help of course.</span></font><font face=Arial><span
style='font-family:Arial'><o:p></o:p></span></font></p>
</div>
</body>
</html>
</x-html>
_______________________________________________
Techtoolslist mailing list
Techtoolslist@flippers.com
http://seven.pairlist.net/mailman/listinfo/techtoolslist
Received on Sat Apr 02 09:05:08 2005
This archive was generated by hypermail 2.1.8 : Mon Sep 12 2005 - 19:58:50 EDT