DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-82
| Date of introduction: | August 1993 | Display technology: | LCD dot matrix |
| New price: | Display size: | 8 * 16 characters | |
| Size: | 6.8" x 3.1" x 0.85" | ||
| Weight: | 5.6 ounces | Serial No: | 13031722 |
| Batteries: | 4*AAA + CR1620 (35mA) | Date of manufacture: | mth 01 year 1994 (K) |
| AC-Adapter: | Origin of manufacture: | Taiwan (I) | |
| Precision: | 14 | Integrated circuits: | CPU: Toshiba T84C00 ASIC: Toshiba TC14L010 ROM: LH531©1993 RAM: SRM2A256 Display: Toshiba T6A04 |
| Memories: | |||
| Program steps: | 28k Bytes | Courtesy of: | Joerg Woerner |
The
TI-82 was released in August 1993 after the TI-81 and TI-85
and filled the gap between them neatly. The TI-82 introduced a serial interface
to connect either two calculators or one calculator and a personal computer.
Later Graphing calculators like the TI-83 got a smoother housing, view the
restyled TI-82, too.
Dismantling
this TI-82 manufactured in January 1994
reveals no surprises. There are a lot of rumors that the TI-82 was based
on the TI-85 but we have our doubts: This TI-82 and a TI-81
manufactured in February 1994 use an identical printed circuit board (PCB) with
just different RAM and ROM chips populated.
The
hardware consists of a Z80 compatible Toshiba T84C00 CPU, a Toshiba TC14L010 ASIC
(1.0 micron C-MOS gate array with 1,000 usable gates) for the glue logic, a
Sharp LH531©1993 Mask ROM with 128k Bytes capacity and a Suwa Seikosha SRM2264
Static RAM (SRAM) with 8k Bytes capacity for both user programs and user data. Learn more about the
Hardware Architecture of TI’s Graphing Calculators. Don't miss an
early TI-82 using a Toshiba TC541001AF OTP ROM (One
Time Programmable ROM), instead the Mask ROM. Recently we discovered a TI-82
manufactured in July 1993 with ROM-Version 10.0 burned into a
Sharp LH531©1993 ROM!
The driver circuit of the LC-Display was
reduced from three Quad-Flat-Pack chips of the original TI-81 to just one bare
Toshiba T6A04 chip mounted on a flexible piece of circuit board attached between the display
and the main PCB.
A special "teacher version" called TI-82
VSC combines the standard TI-82 features with a port to connect to a
ViewScreen panel via a cable. Placing the panel on the overhead projector
enlarges the image of the handheld screen so that each student can follow along.
The TI-82 got in 1995 a slightly modified appearance, please focus on the color of the TI-82 designator.
The TI-82 was mentioned in TI's press
release dated August 15, 2002 to celebrate the 35th anniversary of its
invention of the electronic calculator.
ROM-Versions:
15.0
16.0
17.0
18.0
You can check the ROM version of your TI-82
using the following key sequence and reading the number on your screen:
