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 
   <A HREF="ftp://ftp.ast.com/D-OTHER/DRV_INFO.EXE">DRV_INFO.EXE</A> from the DOS prompt.

   File <A HREF="ftp://ftp.ast.com/D-OTHER/DRV_INFO.EXE">DRV_INFO.EXE</A> 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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