IBM ThinkPad 390, i Series 1720/1721                  February 03, 1999
System Program Service Diskette

Version 5.20
========================================================================


What This Diskette Does
-----------------------

This System Program Service Diskette updates the system BIOS program
stored in the ThinkPad system to fix problems, add new functions, or
expand functions as noted below.  The supported models are as follows.

   - ThinkPad 390
   - ThinkPad i Series 1720/1721

To determine if you should update the system program, please refer to
the "Summary of Changes" section.

To update the system program, please refer to the "Updating System
Program" section.


Released Version
----------------

Version 5.20     Fixes for some problems
Version 5.17     Fixes for some problems
Version 5.16     Fixes for some problems
Version 5.15     Initial release


Summary of Changes
------------------

 Key: <n.nn>  Diskette Version (for example, 1.00 means Version 1.00)
      (New)   New Function or Enhancement
      (Fix)   Correction to existing function

<5.20>
 - (Fix) Windows 98: The battery can't show 100% when fully charged.
 - (Fix) The French keyboard can't accept the 'M' key when it is pressed
         for password entering.
 - (Fix) After entering BIOS Setup Utility, the century year will be
         changed to 20th intermittently.

<5.17>
 - (Fix) OS/2: When the system resumes from suspend or hibernation,
         sometimes audio function is not available.
 - (Fix) OS/2: When the system resumes from suspend or hibernation,
         sometimes short strange noise can be generated.
 - (Fix) Windows NT/95/98: The system cannot enter hibernation mode from
         suspend by hibernation timer.
 - (Fix) If the processor speed is not set to "Fixed Max" in BIOS setup,
         the system hangs up after resuming from hibernation mode.

<5.16>
 - (Fix) System hang after resume from Suspend via Standby timer of 
         Windows 98 while Power On Password is enabled.
 - (Fix) System Crash Page: Using IntelliSync 97 to transfer file will
         hang.

<5.15>
 - (New) Support for ThinkPad 390


Updating System Program
-----------------------

To determine if you should update the system program, please refer to
the "Summary of Changes" section.

Notes: - You need an AC adapter and a charged battery pack to update
           the system program.

1.  Print these instructions or display them on another computer.
2.  Firmly connect the AC adapter to the computer.
3.  Insert the System Program Service Diskette into the diskette drive
    and turn on the computer.
4.  When prompted press the '1' key to update the system program.

    Warning: Do not turn off the computer until the update
             has been completed. IF YOU TURN OFF THE
             COMPUTER WHILE THE UPDATE IS STILL IN PROGRESS, THE SYSTEM
             BOARD MAY HAVE TO BE REPLACED.


System Program Information
--------------------------

Each version of the System Program Service Diskette contains the
following system BIOS program.

  Diskette    BIOS        BIOS
  Version     Date        Version
  --------    --------    ------------
  5.20        12/24/98    V1.0 R01-C3
  5.17        12/12/98    V1.0 R01-C0
  5.16        10/22/98    V1.0 R01-A7
  5.15        10/15/98    V1.0 R01-A6

The BIOS Date can be viewed by invoking "IBM BIOS Setup Utility".
The BIOS Version can be viewed by selecting "Config" in the 
"IBM BIOS Setup Utility" menu.


Trademarks
----------

  * IBM, OS/2 and ThinkPad are registered trademarks of IBM Corporation.
  * Windows is a registered trademark of Microsoft Corporation.

  Other company, product, and service names may be registered trademarks,
  trademarks or service marks of others.