Texas Instruments TI89 and TI92 Plus Computer 
I have a few TI calculator programs that I've been making available on my web server for a few years but I will soon be canceling all of my Internet services. I expect that my files have been outdone many times since I wrote them but anyone wishing to do so may mirror or otherwise redistribute the site. Frank Westlake 
The programs on this site are offered asis, since the author is no longer around to provide support. 
AMS version 2.03 was released December 09, 1999 and will necessitate some changes to all programs and functions available here. Predominately these changes will consist of modifying the comments to work with the new catalog and mode strings to work with language packages. Programs and functions which have been modified for AMS 2.03 will have this iconnext to them. Caution!: Hardware version 2 for the TI89 and TI92+ has some changes that may make some of these programs and functions unusable. I do not have a calculator with HW v2 so I am not able to ensure compatibility. If you are getting incorrect results with one of my math functions, please write to me at the address listed in the function. 
Programming Notes  
Documentation of Functions and Programs 
How to provide the most help from the VARLINK viewer. 

Using Dialog. 
Programs and Functions for the TI89 and TI92 Plus  
PRGM/FUNC  Ver  AMS  Description 
for the TI89 andTI92 Plus 
v0.2  v1.0
v1.01 v1.05 
Send and receive email with your calculator. This program is still under construction but I have little time to work on it and I didn't want to hold it back. Requires Windows 95/Windows NT 4.0 or later. 

v1.0  v1.05  Inverts a function and swaps the variables. 

v1.1  v2.03  Solve a system of nonlinear equations in a list or matrix (single or multivariable). 

v1.0  v1.05  Reduce a number to its closest metric equivalent (i.e. metric(2000)=2 kilo("k")). 

v2.1  v2.03  Convert a string of numbers of any base to a string of numbers of another base. 

v1.0  v1.05  Convert numbers to a Roman numeral string and vice versa. 
Calculus Functions for the TI89 and TI92 Plus  

v0.1  v1.05  Directional Derivative and Gradient (Multivariable). 

v1.0  v1.05  Implicit Derivative of one or higher order (single or multivariable). 

v1.0  v1.05  Partial Derivative of one or higher order (single or multivariable). 

v1.0  v1.05  Total Derivative (Chain Rule). 

v1.0  v1.05  Euler's Numerical Method. 

v1.0  v2.03  Local Extrema (minimum, maximum, saddle point). 

v1.0  v2.03  Iterated integrals 

v1.1  v2.03  Lagrange optimization (minimum, maximum, with constraint). 

v1.2  v1.05  Limits (single or multivariable). Updated September 23, 1999. 

v1.1  v1.05  Standard Linear Approximation (single or multivariable). November 02, 1999. 

v1.1  v1.05  Approximates an integral using Riemann Sums (left, right, mid, Trapezoid, or Simpson's). 

v0.1  v1.05  Taylor approximations for multivariable functions. 
Programs for the TI92 Plus  
PRGM/FUNC  Ver  AMS  Description 

v2.2  v1.05  Create, load, edit, and save pictures and icons. 
Demonstration

A demonstration of how Image Editor can be used to create complete font sets.  

N/A  If you haven't already done it, create sec(), csc(), cot(), arcsec(), arccsc(), and arccot(). 
Programs for PC support of the TI92 Plus and TI89 (*Calculator versions tested with)  

v1.3  Description:
Operates the TI89 and TI92+ remotely via script (possibly the TI89 too). Changes:


Description:
Several console utilities for creating RTF files from TI files, for copying bitmaps to and from PIC files, for copying text to and from TEXT and STR files, and for displaying information about all TI files. These are all Windows 32 bit console programs and will only work for TI89, 92, and 92 Plus files, except that images can be copied from all TI calculator files (I think, let me know if I missed one). Contents:
Changes:



a  Description:
Future project. Control the calculator and transfer and edit variables. 
This work is dedicated to the
Public Domain.