Record number:       H163817
   Device:              D/T6561
   Model:               M
   Hit count:           UHC00000
   Success count:       USC0000
   Publication code:    PC50
   Tip key:
   Date created:        O98/06/03
   Date last altered:   A98/06/03
   Owning B.U.:         USA

 Abstract:  SLOW CD-ROM PERFORMANCE WITH PRELOADED BUSMASTER DRIVER


 SYMPTOM:
 When using the preloaded Intel Busmaster IDE device driver,
 user's may notice reduced performance when using 32X CD-ROM
 drives.

 PROBLEM ISOLATION AIDS:
 This tip applies to IBM PC300GL Series 6561/6591 systems
 preloaded with Windows95 OSR-2 and configured with a 32X
 CD-ROM drive.

 The slowed CD-ROM performance condition may also be seen in
 other systems preloaded with Windows95 OSR-2 and configured
 a 32X CD-ROM drive.

 FIX:
 Remove the preloaded Intel Busmaster IDE device driver and
 install the native Windows95 IDE device driver.

 To Remove the Intel Busmaster Driver:

 1. Create the Intel Win95 Busmaster driver Z23T11A.EXE on a
    diskette from the RTC, or the IBM PC web site URL:

      www.us.pc.ibm.com/files.html

 2. Insert the Intel Busmaster driver diskette into the A: drive.

 3. Open a DOS window and type "a:setup". Press <Enter>.

 4. After the install Wizard starts, click the NEXT button in the
    Welcome panel.

 5. Click the DE-INSTALL button in the Select Components panel.

 6. The driver will be de-installed. You will then be asked to
    restart Windows. Click "OK", and remove the diskette from
    the A: drive.

 7. When the system reboots, the Update Device Driver Wizard will
    appear. Do NOT reinsert the Intel Busmaster driver diskette.
    Click NEXT, and the Wizard will locate the native Windows95
    OSR2.x driver "Intel 82371AB PCI Bus Master IDE Controller"
    on the hard disk. Click the NEXT button.

 9. When prompted to restart the system, click YES. If there is
    more than one IDE device in the system, you may be prompted
    to restart Windows95 more than once.


 Windows and Windows95 are trademarks of Microsoft Corporation.

 SAS KEYWORDS:
    PSY2               CDT                CDTCDROM           PSY2CDROM
    D/T6561            D/T6591            6561               6591
    CDROM              32XCDROM           UNCLASSIFIED       88615