Datamath Commemorative Calculator

DALLAS (September 21, 1972) „A line of three new calculators introduced today marks the formal entry of Texas Instruments into the electronic calculator market. The three new calculators are the TI-2500 Datamath™ portable calculator and the TI-3000 and TI-3500 desk models.“
© Texas Instruments, More in the History of Innovation.

To celebrate the 30th anniversary of the wonderful TI-2500 Datamath™ calculator the Datamath Calculator Museum gives you one as a present! 

Compared to the old-fashioned original calculator this Windows™ compatible Datamath Commemorative replaces the 4-bit single-chip calculator circuit with Pentium™ power, lacks the acid NiCd rechargable batteries and features even an Online-Manual. 


Legal Information

Before downloading the Datamath Commemorative Software read this chapter carefully.


These terms and conditions of use may be changed in the future without further notice.

We make no warranty as to the currency, operability, or fitness for any particular purpose of any freeware software posted to this site, and will assume no liability for any losses or damages alleged to arise from use of or reliance on such software. We undertake no duty to determine the currency, operability, or fitness for any particular purpose of any freeware software posted to this site.

There are inherent dangers in the use of any software available for downloading on the Internet, and the Datamath Calculator Museum cautions you to make sure that you completely understand the potential risks before downloading any of the software. You are solely responsible for adequate protection and backup of the data and equipment used in connection with any of the Software, and the Datamath Calculator Museum will not be liable for any damages that you may suffer in connection with downloading, using, modifying or distributing any of the Software.


Download Datamath Commemorative 



(936 kByte)   Version 2.0   November 3, 2003

(536 kByte)   Version 2.0   November 3, 2003

Version History

bulletVersion 1.2   Pre-release to 10 Beta-Testers 
bulletVersion 1.5   Official release September 21, 2002
bulletVersion 1.6   Contex-Menue (Help, About,Exit) added and problems with some video-drivers solved
bulletVersion 1.7   Minor Bugfix found on Windows XP installations
bulletVersion 1.8   Enhanced to replace Windows calculator 
bulletVersion 2.0   Contex-Menue (Minimize) enhanced

Installation Requirements

Windows 98, ME, XP, NT 4.0 and 2000 are ready for immediate usage.

System Requirements

bulletPentium 100
bulletMinimum of 800 x 600 screen resolution
bulletAt least 24-bit color mode settings, prefer 32-bit (true) color setting.
bullet32Mb of memory
bullet20 Mb free disk space
bulletInternet access for Online-Manual

Using the Datamath Commemorative

Simply Download the Datamath Commemorative and add the Program Icon to your desktop. Launching the Datamath Commemorative will give you the look and feel of the original TI-2500 Datamath™ portable calculator introduced 30 years ago. Please notice:

bulletThe CONST switch is fully working.
bulletCalculator precision differs very slightly from the original implementation.
bulletClicking the small TI logo and Datamath™ logo will open additional windows.
bulletUse the <F1> key for help. The button Online Help... will open an Online-Manual if the PC is connected to the Internet.
bulletThe <ESC> key terminates the Datamath Commemorative.
bulletRight-click on the mouse will open Contex-Menue.
bulletVersion 1.8: Just use the numerical keyboard and the <C>, <D>, and <E> keys of your computer to speed up your entries.

Uninstalling Datamath Commemorative

To "uninstall" DATAMATH.EXE, just delete the program from your harddisc drive. It has no side-effects at all that would require "uninstalling" in the normal sense.


During evaluation of the Datamath Commemorative Software we noticed some incompatibilities with elder Windows NT 4.0 installations. Some Windows 2000 installations showed a red rectangular surrounding the Datamath calculator.



Kirk B. Muri Spending dozens of hours with the design, software implementation and verification of the Datamath Commemorative
Göran Larsson Generating the 7-segment display images used in the User-guide.
Barbara G. Woerner Creating the design and layout of the online User-guide.
Herb Foster Providing the continual support for the Datamath Calculator Museum and the Datamath Commemorative project.


Datamath Calculator emulation software
User-guide HTML documents
Display images in the User-guide
Original Datamath calculator concept and design
© 2002 Kirk B. Muri
© 2002 Joerg Woerner
© 2002 Göran Larsson
1972 Texas Instruments


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If you have additions to the above article please email:

© Joerg Woerner, September 13, 2002. No reprints without written permission.