                                                             Last Revised
    AST RESEARCH, INC.        TECHNICAL BULLETIN # 1541          10/21/97

    TITLE:  Ascentia P, Slow CD-ROM, MPEG

    ISSUE

       When a user installs the Xing MPEG player on an   Ascentia P and
       runs the software under Windows 95, the CD-ROM will play very
       slowly.

    BACKGROUND

       The IOS.VXD file in Windows 95 causes excessive seeks on data
       requests from the CD-ROM drive when playing a video CD.  This
       results in degradation in the rate of data transfer from the
       drive.  The computer may seem to stop responding (hang) due to
       the very slow rate at which the system is reading data from the
       CD.

    ACTION

       To resolve the problem, follow the instructions below:

       1. Download the file IOSUPD.EXE from Microsoft's web site
          (located at www.microsoft.com) into a temporary
          directory.

       2. In My Computer or Windows Explorer, double-click the
          IOSUPD.EXE file downloaded in step 1.

       3. Follow the instructions on the screen.

    NOTES

       Microsoft updated file IOS.VXD, contained in the IOSUPD.EXE file,
       to correct the problem stated above.

    TAN 004033AH

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