TI-89 General Information
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The TI-89 is an advanced graphing calculator made by Texas Instruments with the intended market of math and engineering college students. It is a variation of the TI-92 and TI-92 Plus models; contained in a traditional TI-8X style case, it uses a 10MHz variation of the Motorolla MC68000 microprocessor. It is fully compatible with the TI-92+ calculator, however the screen (LCD) is smaller (160x100) and the unit is equipped with 512K of memory, a large chunk of that is the flash rom. Since it does not contain a QWERTY keyboard, this calculator is allowed on standardized tests such as the SAT. For about $135 dollars, you cannot go wrong. Three dimensional graphing, symbolic manipulation, pretty print, and upgradable flash ROM make the TI-89 a truly superior calculator. |
TI-89 Bid Specifications
- Electronic upgradability of software including maintenance and feature upgrades.
- Advanced Mathematics Software functionality suitable for college mathematics and engineering coursework.
- Symbolic manipulation for algebra and calculus.
- Pretty Print shows equations and results with radical notation, stacked fractions, and superscript exponents.
- Real and complex results.
- Active home history screen can hold up to 99 previous equations for deep recall.
- About 188K bytes of user-available RAM (memory).
- 384K bytes of user-available Flash memory in the form of user data archive.
- Graphs functions, parametric equations, polar equations, recursively-defined sequences, 3-dimensional surfaces, and differential equations.
- Slope and direction fields for exploring differential equations.
- Shows numeric evaluation of functions in table format.
- Interactive analysis of function values, roots, maximums, minimums, integrals, derivatives, intersections, inflection points, and arc lengths.
- Exact symbolic solutions to many 1st- and 2nd-order ordinary differential equations.
- RK and Euler numeric differential equation solving methods.
- Real time rotation of 3D surfaces.
- View contour levels and implicit plots via the 3D grapher.
- Symbolic systems of equations solving for many linear and non-linear systems.
- Advanced matrix operations including eigenvalues and eigenvectors, LU and QR decompositions.
- Build a custom equation library to store, analyze, or numerically solve for any unknown variable.
- Over 100 symbolic units for use in equations, computations, and unit conversions.
- 20 constants with symbolic units.
- Hexadecimal and binary operations and conversions.
- List-based one- and two-variable statistical analysis, including ten regression models.
- Statistical plots including scatter, xy-line, box, and modified box plots.
- Column-logic expressions in data/matrix editor are retained for automatic recalculation when values change.
- Extensive programming capability with number of programs limited only by available memory. Optional assembly language programming.
- User-definable functions extend built-in functionality.
- Command catalog screen to access and show "help" information for each function.
- Compatible with Calculator-Based Laboratory™ (CBL™) and Calculator-Based Ranger™ (CBR™) Systems to allow analysis of real-world data.
- Accessories allow information to be transferred to computer and printed or stored on disk.
- Link capabilities for data transfer through I/O port.
- Unit-to-unit link cable included.
- Overhead projectable unit available.
- Powered by 4 AAA batteries with lithium battery backup to protect memory during main battery change.
- One-year limited warranty.
- Toll-free hot-line and e-mail.
- Volume Purchase Program.
- Workshop Loan Program.
TI-89 Hardware Specifications
Custom MC68000 10MHz processor.
2048 KB of RAM from $000000 to $1fffff (RAM after $3ffff wraps around to $00000).
2048 KB of flash ROM from $200000 to $3fffff.
Memory mapped I/O from $600000 to $60001f.
160 by 100 dot memory mapped video beginning at $4c00.
8 by 7 keyboard matrix.
Keyboard independent ON key.
Programmable rate generator used to control auto interrupt 5 frequency.
Buffered link port control.
For 68000 specifications, see the contents page of 89 Central.
Assembly programming for the 89 is accomplished using a link, either by the TI-Graph Link and the Graph Link Software or by a homemade serial link and terminal software such as CAL. For compiling assembly level programs, the compiler of choice is A68k. Also, it is recommended that you use the shell features and libraries by downloading either PlusShell or Doors OS; both include a batch utility to convert compiled code to the .89z format.
Visit the Texas Instruments' TI-89 site!
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