BIOS Update (Diskette) - ThinkPad 600E (2645: 55x, 56x, 57x, 58x, A5x, A6x, Bxx [except for BAU], JJ1, JJ2, RRA)
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README for BIOS - System Program Service Diskette
12.48 KB
1.15 (IHET47WW) 12 Oct 2001
BIOS - System Program Service Diskette
612.95 KB
1.15 (IHET47WW) 12 Oct 2001
The BIOS Update enhances certain ThinkPad systems to address operational issues, add new functions, or expand functions as noted below.

This BIOS Update can only be installed on the following model and type numbers. It can not be installed on any other models.
- ThinkPad 600E:
2645 - 55x, 56x, 57x, 58x, A5x, A6x, Bxx (except for BAU), JJ1, JJ2, RRA

- Your machine type is located on the bottom of your system, just above the bar code symbol.
- This program is language independent and can be used with any language system.

See the bottom of this page for links to previous BIOS releases.
Additional information

Click here for instructions and limitations on downloading and creating the diskette.

This Additional Information field contains the following sections.
I. Summary of changes
II. Installation instructions
III. BIOS information with links to previous BIOS releases
IV. Memory information
V. Simple Boot Flag function
VI. Windows 2000 drive letter assignments

I. Summary of changes
version 1.15 - IHET47WW

  • (New) Microsoft Windows XP Support
  • (Fix) Operating system installation failure with CD-ROM boot

Click here for a complete list of changes fixed by this BIOS update.

II. Installation instructions

  • You need an AC adapter and a charged battery pack to update the system program.
  • If your computer is attached to any kind of docking station or port replicator, turn off the computer and detach it before proceeding.
  • After creating the BIOS diskette, make sure it is write protected.
  1. Print these instructions or display 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. Select Read this first from the menu and carefully read the information that appears.
  5. Press the Esc key to return to the menu.
  6. Select Update system program and follow the instruction on the screen.
    Attention: Do not turn off or suspend the computer until the update has been completed. If you turn off or suspend the computer while the update is still in progress, the system board may have to be replaced.

    After the update has been completed, do the following to make the changes effective.

  7. Make sure the System Program Service Diskette is removed from the diskette drive, then turn off the computer.
  8. Press and hold the F1 key, then turn on the computer. Hold the F1 key until the Easy-Setup menu appears.
  9. If a password prompt appears, type the correct password.
  10. Select Config, then select Initialize.
  11. Select OK to initialize the system.

    Run the diagnostics to make sure that the computer runs with no errors:

  12. Turn off the computer, press and hold the F1 key, then turn on the computer. Hold the F1 key until the Easy-Setup menu appears.
  13. Select Test, then select Start to run all the basic tests.
    Various test patterns will appear on the screen.
    An OK will appear for each device that passes the test.
  14. Verify that OK appears for all of the devices tested.
  15. Press the Esc key to exit Test and turn off the computer.

III. BIOS information
Each version of the BIOS update diskette contains the following system program information

Diskette version BIOS version BIOS date File name
1.00 ihet33WW 17 Dec 1998 sytpv100
1.01 ihet33WW 17 Dec 1998 sytpv101
1.02 ihet35WW 26 Mar 1999 sytpv102
1.03 ihet36WW 12 Apr 1999 spsdih36
1.04 ihet37ww 28 Jun 1999 Replaced by next line
1.05 ihet37ww 28 Jun 1999 spsdih37
1.06 ihet38ww 10 Sep 1999 spsdih38
1.08 ihet40ww 11 Sep 1999 spsdih40
1.09 ihet41ww 11 Sep 1999 spsdih41
1.10 ihet42ww 11 Sep 1999 spsdih42
1.11 ihet43ww 11 Sep 1999 Never released to the Web
1.12 ihet44ww 11 Sep 1999 Never released to the Web
1.13 ihet45ww 11 Sep 1999 spsdih45
1.14 ihet46ww 11 Sep 1999 spsdih46
1.15 ihet47ww 11 Sep 1999 Current Release

The BIOS information can be viewed by selecting System Information in the BIOS Utility menu:
  1. Power on the system.
  2. When the message Press F1 for IBM BIOS setup Utility appears at the bottom right hand corner, press the F1 key. Wait for the BIOS Utility screen to appears.
  3. Select System Information. BIOS version is displayed at System BIOS Version line.

Slave controller version number can be viewed by running ThinkPad Configurator from your operating system and select System Information from the Help menu or the System Information button. Slave controller information can also be found by invoking Easy-Setup and selecting Config followed by System Board.

Diskette version
Slave controller version
Slave controller date
1.08 IHHT08WW
16 Jul 1999
1.08 IHHT08WW
16 Jul 1999
1.08 IHHT08WW
16 Jul 1999
1.08 IHHT08WW
16 Jul 1999
1.08 IHHT08WW
16 Jul 1999
1.08 IHHT08WW
16 Jul 1999
1.08 IHHT08WW
16 Jul 1999
1.08 IHHT08WW
16 Jul 1999
1.08 IHHT08WW
16 Jul 1999
1.08 IHHT08WW
16 Jul 1999

IV. Memory information
The following information shows memory areas that are unavailable or that can be included on a memory manager such as EMM386.

Reserved BIOS area*
C0000-CBFFF (reserved for Video BIOS)
F0000-FFFFF (reserved for BIOS)

Usable BIOS ROM area*
E0000-EFFFF (can be used as UMB (Upper Memory Block))

V. Simple boot flag function
This function automatically optimizes the behavior and boot performance of the BIOS and operating system, based on the installed operating system and previous boot.

If this function is Enabled and once a Plug and Play-capable operating system, such as Windows 98, is installed, the system BIOS does not configure such hardware resources as system interrupts, memory ranges, and I/O port ranges for all the devices in the system.

If you are going to use a non-Plug and Play-capable operating system, disable this function so that the BIOS will configure hardware resources.


If you are using multiple operating systems in addition to Windows 95/98, you must DISABLE the Simple Boot Flag in Easy-Setup.

To modify the Simple Boot Flag:

  1. Hold down the F1 key on the ThinkPad and power on the system.
  2. Open the Config icon.
  3. Open the Quick Boot icon.
  4. Set Simple Boot Flag to Enable or Disable depending on configuration.

VI. Windows 2000 drive letter assignments
From BIOS version IHET38WW, diskette drive/drive letter handling under Windows 2000 environment has been changed to fixed drive letter assignment.

  • External diskette drive letter: A drive (A:)
  • Ultraslim Bay diskette drive letter : B drive (B:)

If you are unable to find what you are looking for, please do try the following options:
1. Lenovo Assisted Search
2. Product usage and general troubleshooting tips
3. Lenovo Support Forum
4. Technical Support Call Centre

Document ID : DS001340
Legacy Document ID : DSHY-43DNQ5
Last Updated :
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