Texas Instruments Presenter 

Date of introduction:  1999 Display technology:   
New price:  $300.00 (SRP 2008) Display size:   
Size:  7.9" x 10.9" x 1.6"
 200 x 278 x 40 mm3
Weight:  40.9 ounces, 1,160 grams Serial No:  14500000718
Batteries:   Date of manufacture:  mth 07 year 2003 (B)
AC-Adapter:  AC9920 Origin of manufacture:  Taiwan (I)
Precision:   Integrated circuits:  CPU: Toshiba TMP91CW12F
 RAM: 2 x Sanyo LC35256FM
 FIFO: IDT 7205
 Flash: Fujitsu MBM29F800TA
 Display Contr.: Epson S1D13506
 Display EDO DRAM: Alliance AS4C1M16E5
Program steps:   Courtesy of:  Joerg Woerner

In the early days of Graphing calculators Texas Instruments developed for teachers "ViewScreen Packages" including the ViewScreen calculator, the ViewScreen panel and a cable. Placing the panel on the overhead projector enlarges the image of the handheld screen so that each student can follow along.

With the phase out of the overhead projectors from the daily life, Texas Instruments developed with the TI-Presenter a perfect replacement based on modern video technology. The ViewScreen calculators, or "teacher units" have all the functionality of the student calculators plus an additional connector for either the ViewScreen panel or the TI-Presenter.

Two different cables were available in 2008:

• Cable I: TI-73 VSC, TI-73 Explorer VSC, TI-80 VSC, TI-82 VSC, TI-83 VSC,
   TI-83 Plus VSC, TI-83 Plus Silver Edition VSC, TI-84 Plus VSC, TI-84 Plus Silver Edition VSC,
   TI-85 VSC (2nd design), TI-86 VSC
• Cable II: TI-89 VSC, TI-89 Titanium VSC, TI-92, TI-92 Plus, Voyage 200

Student versions of the TI-84 Plus family and the TI-89 Titanium connect to both the ViewScreen panel and the TI-Presenter with the Presentation Link Adapter. In 2008 two different Presentation Link Adapters were available:

• TI-84 Plus Adapter: Connects to the TI-84 Plus and TI-84 Plus Silver Edition with Cable 1
• TI-89 Titanium Adapter: Connects to the TI-89 Titanium with Cable 2

The TI-Presenter itself connects with the video interface to any projection device with a video input port, e.g. a TV, VCR or video camera or video projector. Two different TV formats are supported, NTSC and PAL, using either Composite Video or a RF modulator.

Dismantling this TI-Presenter with Date code I-0703B manufactured in July 2003 by Inventec Corporation in Taiwan reveals an unexpected complex design not related to any technology used with other products from Texas Instruments' calculator division like the 16/32-bit Flash ROM Architecture known from the TI-92 and its derivatives. Learn more about the Hardware Architecture of TI’s Graphing Calculators.

Processor: The Hardware and Software of the TI-Presenter is centered around a Toshiba TMP91CW12F 16-bit Microcontroller supported by external RAM and Flash ROM and multiple Peripherals. The TMP91CW12F integrates Toshiba's TLCS-900/L1 core - an extension of the earlier TLCS-90 (very similar to Z80 with enhancements of the architecture and instruction set) with some 32-bit registers and a 24-bit address bus - with a huge variety of peripherals, 4k Bytes internal RAM and 128k Bytes ROM in a tiny 100-pin QFP package.

Memory: The programm and data memory of the TI-Presenter is realized with a Fujitsu MBM29F800TA Flash ROM sporting a capacity of 512k x 16 bits and two Static RAM chips Sanyo LC35256FM with a capacity of 32k Bytes, each for a combined 32k x 16 bits capacity.

Color Display Controller: The TI-Presenter manufactured in July 2003 uses an EPSON S1D13506 LCD/CRT/TV graphics controller supporting up to 2M Bytes display buffer and 4 to 16 bit-per-pixel color depths.

Display Memory: The Display Controller uses an external Alliance AS4C1M16E5 Extended data out Dynamic random-access memory (EDO DRAM) with a capacity of 1M x 16 bits.

USB Controller: The Toshiba TMP91CW12F 16-bit Microcontroller is connected to a Philips PDIUSBD12D USB Rev 2.0 Interface Device with Parallel Bus.

CPLD 1 - House Keeping: We located on the printed circuit board (PCB) of the TI-Presenter two Xilinx XC9536 In-System Programmable CPLDs. They are based on Flash technology and feature 36 macro-cells or the equivalent of about 800 usable gates, each. One of the CPLDs seems to be responsible for some housekeeping activities of the TMP91CW12F Microcontroller.

CPLD 2 - Calculator Interface: The large latching connector on the front of the TI-Presenter accommodates either Cable I or Cable II to connect with a Texas Instruments Graphing calculator. Due to the different pin-out and signals of the various compatible calculators sports the TI-Presenter a "Switch Matrix" composed of six Philips 74LV4066 Quad Bilateral Switches for the individual pins of the connector controlled by the second Xilinx XC9536 CPLD.

FIFO: The Calculator Interface of the TI-Presenter is connected with an IDT 7205 dual-port First-In, First-Out (FIFO) memory with a capacity of 8K x 9bits to the Toshiba TMP91CW12F 16-bit Microcontroller.


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© Joerg Woerner, June 29, 2007. No reprints without written permission.