<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns:MadCap="http://www.madcapsoftware.com/Schemas/MadCap.xsd" MadCap:lastBlockDepth="6" MadCap:lastHeight="94" MadCap:lastWidth="853" MadCap:disableMasterStylesheet="true" MadCap:tocPath="Connection Troubleshooting" MadCap:InPreviewMode="false" MadCap:PreloadImages="false" MadCap:RuntimeFileType="Topic" MadCap:TargetType="WebHelp" lang="en-us" xml:lang="en-us" MadCap:PathToHelpSystem="../../" MadCap:HelpSystemFileName="Default.xml" MadCap:SearchType="Stem">
<head><title>FIFO Buffer Settings</title>
<link href="../SkinSupport/MadCap.css" rel="stylesheet" />
<link href="../Resources/Stylesheets/BSE_Help.css" rel="stylesheet" />
<script src="../SkinSupport/MadCapAll.js">
</script>
</head>
<body>
<div class="MCBreadcrumbsBox_0"><span class="MCBreadcrumbsPrefix">You are here: </span><a class="MCBreadcrumbsLink" href="TFAQ.htm">Connection Troubleshooting</a><span class="MCBreadcrumbsDivider"> > </span><span class="MCBreadcrumbs">FIFO Buffer Settings</span>
</div>
<h1>FIFO Buffer Settings</h1>
<p class="PlainText">If you are using a standard serial port connection (not a USB port with a USB to serial adapter) and the <a href="RunIdTest.htm" target="" title="" alt="" class="MCXref_0">Run/Identify Test</a> <![CDATA[ ]]>shows no Device Type, but a "Yes" in the Echo column, or a "Yes" in both the Loopback and Echo columns, like this:</p>
<p>
<img src="../Resources/Images/IDnoDevice.png" />
</p>
<p> </p>
<p>...you may need to adjust the port's FIFO buffer setting.</p>
<p> </p>
<ul style="list-style-type: circle;">
<li class="Checklist" value="1">Make note of the COM port number in the row where it displays a "Yes" for Echo. (In this example it is COM5).</li>
<li class="Checklist" value="2">Find that COM port in Device Manager.</li>
</ul>
<div class="ListIndent">
<div class="MCDropDown">
<div class="MCDropDownHead_0"><a class="MCDropDownHotSpot_0" href="javascript:void(0);" id="MCDropDownHotSpot_2512036703_0" onclick="FMCDropDown( this ); return false;"><img style="border: none;margin-right: 2px;" src="../SkinSupport/DropDownClosed.gif" MadCap:altsrc="../SkinSupport/DropDownOpen.gif" onload="if ( typeof( FMCPreloadImage ) == 'function' ) { FMCPreloadImage( '../SkinSupport/DropDownOpen.gif' ); }" class="MCDropDownIcon" />Finding your Ports List in your computer's Device Manager</a>
</div>
<div class="MCDropDownBody" id="MCDropDownBody_2512036703_0" style="display: none;">
<ul style="list-style-type: circle;">
<li value="1"><span class="MCExpanding"><a href="javascript:void(0);" class="MCExpandingHead_0" onclick="FMCExpand( this ); return false;">Windows 2K<img style="border: none;margin-left: 5px;" src="../SkinSupport/ExpandingClosed.gif" MadCap:altsrc="../SkinSupport/ExpandingOpen.gif" onload="if ( typeof( FMCPreloadImage ) == 'function' ) { FMCPreloadImage( '../SkinSupport/ExpandingOpen.gif' ); }" class="MCExpandingIcon" /></a><span class="MCExpandingBody" style="display: none;">: Start Menu > Settings > Control Panel > System > click Hardware Tab > Device Manager... > expand Ports (COM & LPT)</span></span>
</li>
<li value="2"><span class="MCExpanding"><a href="javascript:void(0);" class="MCExpandingHead_0" onclick="FMCExpand( this ); return false;">Windows XP<img style="border: none;margin-left: 5px;" src="../SkinSupport/ExpandingClosed.gif" MadCap:altsrc="../SkinSupport/ExpandingOpen.gif" onload="if ( typeof( FMCPreloadImage ) == 'function' ) { FMCPreloadImage( '../SkinSupport/ExpandingOpen.gif' ); }" class="MCExpandingIcon" /></a><span class="MCExpandingBody" style="display: none;">: Start Menu > right-click My Computer > Properties > click Hardware Tab > Device Manager > expand Ports (COM & LPT)</span></span>
</li>
<li value="3"><span class="MCExpanding"><a href="javascript:void(0);" class="MCExpandingHead_0" onclick="FMCExpand( this ); return false;">Windows Vista or Windows 7<img style="border: none;margin-left: 5px;" src="../SkinSupport/ExpandingClosed.gif" MadCap:altsrc="../SkinSupport/ExpandingOpen.gif" onload="if ( typeof( FMCPreloadImage ) == 'function' ) { FMCPreloadImage( '../SkinSupport/ExpandingOpen.gif' ); }" class="MCExpandingIcon" /></a><span class="MCExpandingBody" style="display: none;">: Start Menu (Windows icon) > right-click Computer > Properties > Device Manager (left pane) > expand Ports (COM & LPT)</span></span>
</li>
</ul>
</div>
</div>
</div>
<ul>
<li class="Checklist" value="1">Right-click on the COM port, and select Properties</li>
</ul>
<p class="PlainTextIndent">
<img src="../Resources/Images/SerComPortProps.png">
</img>
</p>
<ul>
<li class="Checklist" value="1">On the Port Settings tab, click the Advanced button. </li>
<li class="Checklist" value="2">In the Advanced Settings window, un-check the "Use FIFO buffers" box, then click OK.</li>
</ul>
<p>
<img src="../Resources/Images/FifoUncheck.png">
</img>
</p>
<ul>
<li class="Checklist" value="1">Now try the <a href="RunIdTest.htm" target="" title="" alt="" class="MCXref_0">Run/Identify Test</a> again, or try downloading a program to your BASIC Stamp.</li>
<li class="Checklist" value="2">If this didn't help, <a href="../HomeTopics/Resources.htm#Contact_Parallax" target="" title="" alt="" class="MCXref_0">Contact Parallax</a> Tech Support for assistance.</li>
</ul>
<p> </p>
<div class="Col2">
<div class="MasterFoot">
<p MadCap:conditions="BSEconditions.BSEWebHelp (Primary)-INCLUDE"><a href="../HomeTopics/HomePage.htm">Go to Welcome page</a>
</p>
</div>
</div>
<div class="Col2">
<div class="MasterFoot">
<p style="text-align: right;"><span class="ContactInfoProjectName">BASIC Stamp Help</span> <![CDATA[ ]]><span class="ContactInfoVersion#">Version 2.5.4</span> <![CDATA[ ]]></p>
<p style="text-align: right;">Copyright © <span class="ContactInfoCompanyName">Parallax Inc.</span></p>
<p style="text-align: right;"><span class="SystemShortDate">8/8/2012</span>
</p>
</div>
</div>
<script type="text/javascript">/* <![CDATA[ */
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-285614-1']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
/* ]]> */</script>
<script type="text/javascript" src="../SkinSupport/MadCapBodyEnd.js">
</script>
</body>
</html>