    AST RESEARCH, INC.          TECHNICAL BULLETIN # 1810          4/14/98

    TITLE  CD-ROM Drive Change in Bravo MS 5XXX

    ISSUE

       The CD-ROM drive was changed on later Bravo MS systems resulting
       in a possible real mode (DOS) driver compatibility issue.  This
       issue would only affect software running in DOS mode which
       requires access to the CD-ROM drive.  Windows 95 operation is
       unaffected as all CD-ROM drivers are native to the operating
       system.

       This issue may only arise if it is necessary to reload the
       system's software from the included restore CD.  The system will
       have the correct real mode drivers loaded at the factory.

       This issue could affect all Bravo MS and Bravo MST (51XX and 52XX)
       systems that bear a serial number starting with 058.

    BACKGROUND

       The restore CD was produced containing real mode drivers for the
       originally qualified CD-ROM drive.  Due to availability issues
       with the original CD-ROM drive it was necessary to qualify another
       drive which, unfortunately, required the use of a different driver.

    ACTION

       If your system is identified in the ISSUE section above as having
       the alternate CD-ROM drive, and it is necessary to perform a CD
       restore, you must reload the proper real mode drivers onto the
       system once the restore is completed.  To accomplish this, follow
       the procedure outlined in the notice included with the restore
       diskette shipped with your system.

       If the restore diskette has been misplaced then it will be
       necessary for you to download the file 14934031.EXE from any of
       AST's on-line services.  After downloading this self-extracting
       zip file expand it onto a floppy diskette and follow the
       additional instructions included in the 24XFIX.TXT file after
       performing your standard restore.

    NOTES

       You can download this file from the following services:

          AST WWW Site:  http://www.ast.com
          AST On-Line! BBS*:  See IB0001.TXT
          CompuServe:  GO: ASTFORUM
          Prodigy:   JUMP: ASTSUPPORT
          * Refer to IB0001.TXT for a list of AST's
            international BBS numbers.

    SYSTEMS AFFECTED

       This issue could affect all Bravo MS and Bravo MST (51XX and 52XX)
       systems that bear a serial number starting with 058.

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    notice.  AST Research, Inc. shall not be liable for technical or
    editorial errors or omissions contained herein; nor for incidental or
    consequential damages resulting from the furnishing, performance,
    or use of this material. This material contains information protected
    by copyright. No part of this material may be reproduced in any form
    without prior written consent from AST Research, Inc.
    All rights reserved.
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