OSINTOID - TOSHIBA CD-ROM MODELS NOT RECOGNIZED BY OS/2
08/29/96
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        Toshiba CD-ROM Models Not Recognized by OS/2
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Please Read Entire Document for Full Explanation of Procedures
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DESCRIPTION

Some models and revisions of the Toshiba CD-ROM drive fail to be 
recognized under OS/2 Warp Full Pak or OS/2 Warp Connect on the primary 
or secondary IDE connector. There are several variations of Toshiba 
CD-ROM drive which give different results:
                                                       
CD-ROM Drive    Version   ROM Version  Status
                            
  XM5302B          101        KA50419  Works                             
  XM5302B          004        KA50419  Works                             
  XM5302B          201        KD50728  Fails                             
  XM5402B          000        QA51226  Fails                             
  XM5402B          000        QA51031  Fails

An example of a failing CD-ROM scenario is as follows:

A Toshiba XM5302B CD-ROM is added to  a P5-90 system running OS/2 
version 2.11, Warp FullPack, or Warp Connect. The system locks up on 
startup, before the BIOS message appears on screen.
If the CD-ROM is disconnected and the system restarted, but then 
powered off after the power-on beep,
the system starts and runs without problem. However, if the system is 
turned off again and restarted (with the CD-ROM still attached), it 
will lock up as before.

The failure is more prevalent on Pentium 90 MHz motherboards which use 
the Intel TRITON chipset.

The failure occurs with either AWARD or AMI BIOS versions.

RESOLUTION

The problem was corrected with the addition of a 33 Ohm resistor in   
the reset line of the IDE cable.  

Note: This is not an OS/2 issue; please contact your hardware vendor 
      for assistance.                                





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