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发表于 2009-12-18 13:39:54
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转自：DATAMATH.org
Texas Instruments TI-82
Date of introduction: 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: ** (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 after the TI-81 and TI-85 and filles the gap between them neatly. The TI-82 introduced a serial inte**ce 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 with 128k Bytes capacity and a Suwa Seikosha SRM2264 RAM with 8k Byte capacity for both user programs and user data. Don't miss an early TI-82 using a Toshiba TC541001AF OTP ROM (One Time Programmable ROM), instead the Mask ROM. Recebtly we discovered a TI-82 manufactured in July 1993 with ROM-Verison 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:
[MODE] [ALPHA] [S]
Information provided by ticalc.org and Xavier Andréani.
Exam acceptance:
The TI-82 is permitted (as of September 27, 2007) for use on SAT, ACT, PSAT and AP exams.
The TI-82 is featured in the Texas Instruments Incorporated sales catalog CL-1233 dated 1994. |
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发表于 2009-12-18 12:16:28
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