    AST RESEARCH, INC.        TECHNICAL BULLETIN # 1525         7-12-96

    TITLE: Torisan 4X IDE CD-ROM, Appl. Errors

    SUMMARY

       Computer systems may experience unexpected errors when running
       CD-ROM-based applications.

       This issue applies to any computer system using a Torisan CDR-S1G
       CD-ROM drive.  This issue was duplicated on the 501766 system.

    ISSUE

       When installing software from various CD-ROM-based applications
       using a Torisan CD-ROM drive, model CDR-S1G, the software may
       install correctly, however, when running the application, the
       program may return an unexpected application error and then stop.

    BACKGROUND

       Torisan firmware revision below 2.15, with serial numbers beginning
       with 0 or 1, may exhibit the problem.

    ACTION

       Replace Torisan model CDR-S1G CD-ROM drive, AST part number
       234167-410, to reflect firmware version 2.15 or later.

       The AST part number will follow the revision, which should be D or
       later, for example: D234167-410.

    NOTES

       To determine which firmware your system is using (in Windows 95),
       perform the following steps:

       1. From the Control Panel, click on System.
       2. Click on Device Manager, and then double-click on CD-ROM.
       3. Click on the CD-ROM device, then click on Settings.
          The settings screen will show the firmware version the system
          is currently using.

       To determine which firmware version the CD-ROM drive uses in
       operating systems other than Windows 95, boot to DOS and run file
       DRV_INFO.EXE from the DOS prompt.

       File DRV_INFO.EXE is available from any of AST's On-Line! Services
       including:

          AST WWW Site:  http://www.ast.com
          AST On-Line! BBS*:  See IB0001.TXT
          CompuServe:  GO: ASTFORUM
          Prodigy: Jump: astsupport

    TAN 000621PV

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