Article ID: 819109 - Last Review: October 25, 2005 - Revision: 3.4

FIX: Isochronous packets incorrectly end up in asynchronous packets

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SYMPTOMS

Certain NEC 1394 host controllers have a hardware limitation that causes asychronous direct memory access (DMA) corruption when isochronous streaming occurs.
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CAUSE

When isochronous streaming occurs on a NEC 1394 controller, an isochronous packet can occasionally end up in an asynchronous DMA request/response packet.
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RESOLUTION

Service pack information

To resolve this problem, obtain the latest service pack for Microsoft Windows XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
322389  (http://support.microsoft.com/kb/322389/EN-US/ ) How to obtain the latest Windows XP service pack
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Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

No prerequisites are required.

Restart requirement

You do not have to restart your computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

Windows 2000


   Date         Time   Version        Size    File name
   -------------------------------------------------------
   21-May-2003  00:38  5.0.2195.6747  37,872  Ohci1394.sys
   15-Jan-2003  19:46  5.0.2195.6655  22,064  Sonydcam.sys

Windows XP Service Pack 1 (SP1)


   Date         Time   Version       Size    File name
   ------------------------------------------------------
   12-Jun-2003  17:55  5.1.2600.115  55,680  Ohci1394.sys

Windows XP SP2


   Date         Time   Version        Size    File name
   -------------------------------------------------------
   12-Jun-2003  17:38  5.1.2600.1234  55,808  Ohci1394.sys
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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.

This problem was first corrected in Microsoft Windows XP Service Pack 2.
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MORE INFORMATION

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.
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APPLIES TO
  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Professional Edition
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows XP Professional
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Keywords: 
kbautohotfix kbhotfixserver kbqfe kbtshoot kbwinxpsp2fix kbbug kbfix kbqfe kbwin2000presp5fix kbwinserv2003presp1fix kbwinxppresp2fix KB819109
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