TI-82
Encyclopedia
The TI-82 is a graphing calculator made by Texas Instruments
. The TI-82 was designed in 1993 as a stripped down, more user friendly version of the TI-85
, and as a replacement for the TI-81
. It was the direct predecessor of the TI-83
. It shares with the TI-85
a 6 MHz Zilog Z80
microprocessor
. Like the TI-81
, the TI-82 features a 96x64 pixel display, and the core feature set of the TI-81
with many new features.
The TI-82 is powered by the same processor that powered its cousin, the TI-85
, a 6 MHz Zilog Z80
microprocessor
. This was an improvement over the TI-81
's 2 MHz Z80 processor. In addition, the available RAM was increased more than tenfold — from 2.4 KB
to 28 KB
(the same amount as the TI-85
).
Some of the more notable improvements of the TI-82 over the TI-81 include the following: the addition of a link port to enable programs and other data to be transferred between two calculators or between a calculator and a computer; the addition of two new graphing types—polar and sequence, the addition of a new type of data — the list, the expansion of the size limit of matrices to 50x50, and the (unintentional) addition of the ability to program the calculator in assembly language
. The last of these provided a significant boost in interest in the programmability of the calculator, as the use of assembly language (as opposed to Texas Instruments' own TI-BASIC
) enabled significantly more performance and flexibility with the programs able to be used on the calculator.
Carried over from the TI-81 is the TI-82's power source — four AAA batteries
and one CR1616 or CR1620 lithium
backup battery
(to ensure programs are kept when the AAA batteries are being changed).
RAM
Display
I/O
Power
Integrated programming language
s
Texas Instruments
Texas Instruments Inc. , widely known as TI, is an American company based in Dallas, Texas, United States, which develops and commercializes semiconductor and computer technology...
. The TI-82 was designed in 1993 as a stripped down, more user friendly version of the TI-85
TI-85
The TI-85 was a graphing calculator made by Texas Instruments based around the Zilog Z80 microprocessor. Designed in 1992 as TI's second graphing calculator , it has since been replaced by the TI-86, which has also been discontinued....
, and as a replacement for the TI-81
TI-81
The TI-81 is the first graphing calculator made by Texas Instruments. It was designed in 1990 for use in algebra and precalculus courses. Since its original release, it has been superseded several times by newer calculators - the TI-82, the TI-83, the TI-83 Plus, TI-83 Plus Silver Edition, the...
. It was the direct predecessor of the TI-83
TI-83 series
The TI-83 series of graphing calculators is manufactured by Texas Instruments.The original TI-83 is itself an upgraded version of the TI-82. Released in 1996, it is one of the most used graphing calculators for students...
. It shares with the TI-85
TI-85
The TI-85 was a graphing calculator made by Texas Instruments based around the Zilog Z80 microprocessor. Designed in 1992 as TI's second graphing calculator , it has since been replaced by the TI-86, which has also been discontinued....
a 6 MHz Zilog Z80
Zilog Z80
The Zilog Z80 is an 8-bit microprocessor designed by Zilog and sold from July 1976 onwards. It was widely used both in desktop and embedded computer designs as well as for military purposes...
microprocessor
Microprocessor
A microprocessor incorporates the functions of a computer's central processing unit on a single integrated circuit, or at most a few integrated circuits. It is a multipurpose, programmable device that accepts digital data as input, processes it according to instructions stored in its memory, and...
. Like the TI-81
TI-81
The TI-81 is the first graphing calculator made by Texas Instruments. It was designed in 1990 for use in algebra and precalculus courses. Since its original release, it has been superseded several times by newer calculators - the TI-82, the TI-83, the TI-83 Plus, TI-83 Plus Silver Edition, the...
, the TI-82 features a 96x64 pixel display, and the core feature set of the TI-81
TI-81
The TI-81 is the first graphing calculator made by Texas Instruments. It was designed in 1990 for use in algebra and precalculus courses. Since its original release, it has been superseded several times by newer calculators - the TI-82, the TI-83, the TI-83 Plus, TI-83 Plus Silver Edition, the...
with many new features.
Features of the TI-82
The TI-82 is powered by the same processor that powered its cousin, the TI-85
TI-85
The TI-85 was a graphing calculator made by Texas Instruments based around the Zilog Z80 microprocessor. Designed in 1992 as TI's second graphing calculator , it has since been replaced by the TI-86, which has also been discontinued....
, a 6 MHz Zilog Z80
Zilog Z80
The Zilog Z80 is an 8-bit microprocessor designed by Zilog and sold from July 1976 onwards. It was widely used both in desktop and embedded computer designs as well as for military purposes...
microprocessor
Microprocessor
A microprocessor incorporates the functions of a computer's central processing unit on a single integrated circuit, or at most a few integrated circuits. It is a multipurpose, programmable device that accepts digital data as input, processes it according to instructions stored in its memory, and...
. This was an improvement over the TI-81
TI-81
The TI-81 is the first graphing calculator made by Texas Instruments. It was designed in 1990 for use in algebra and precalculus courses. Since its original release, it has been superseded several times by newer calculators - the TI-82, the TI-83, the TI-83 Plus, TI-83 Plus Silver Edition, the...
's 2 MHz Z80 processor. In addition, the available RAM was increased more than tenfold — from 2.4 KB
Kilobyte
The kilobyte is a multiple of the unit byte for digital information. Although the prefix kilo- means 1000, the term kilobyte and symbol KB have historically been used to refer to either 1024 bytes or 1000 bytes, dependent upon context, in the fields of computer science and information...
to 28 KB
Kilobyte
The kilobyte is a multiple of the unit byte for digital information. Although the prefix kilo- means 1000, the term kilobyte and symbol KB have historically been used to refer to either 1024 bytes or 1000 bytes, dependent upon context, in the fields of computer science and information...
(the same amount as the TI-85
TI-85
The TI-85 was a graphing calculator made by Texas Instruments based around the Zilog Z80 microprocessor. Designed in 1992 as TI's second graphing calculator , it has since been replaced by the TI-86, which has also been discontinued....
).
Some of the more notable improvements of the TI-82 over the TI-81 include the following: the addition of a link port to enable programs and other data to be transferred between two calculators or between a calculator and a computer; the addition of two new graphing types—polar and sequence, the addition of a new type of data — the list, the expansion of the size limit of matrices to 50x50, and the (unintentional) addition of the ability to program the calculator in assembly language
Assembly language
An assembly language is a low-level programming language for computers, microprocessors, microcontrollers, and other programmable devices. It implements a symbolic representation of the machine codes and other constants needed to program a given CPU architecture...
. The last of these provided a significant boost in interest in the programmability of the calculator, as the use of assembly language (as opposed to Texas Instruments' own TI-BASIC
TI-BASIC
TI-BASIC is the unofficial name of a BASIC-like language built into Texas Instruments 's graphing calculators, including the TI-83 series, TI-84 Plus series, TI-89 series, TI-92 series , TI-73, and TI-Nspire...
) enabled significantly more performance and flexibility with the programs able to be used on the calculator.
Carried over from the TI-81 is the TI-82's power source — four AAA batteries
AAA battery
A triple A or AAA battery is a standard size of dry cell battery commonly used in portable electronic devices. A carbon-zinc battery in this size is designated by IEC as "R03", by ANSI C18.1 as "24", by old JIS standard as "UM 4", and by other manufacturer and national standard designations that...
and one CR1616 or CR1620 lithium
Lithium battery
Lithium batteries are disposable batteries that have lithium metal or lithium compounds as an anode. Depending on the design and chemical compounds used, lithium cells can produce voltages from 1.5 V to about 3.7 V, over twice the voltage of an ordinary zinc–carbon battery or alkaline battery...
backup battery
Battery (electricity)
An electrical battery is one or more electrochemical cells that convert stored chemical energy into electrical energy. Since the invention of the first battery in 1800 by Alessandro Volta and especially since the technically improved Daniell cell in 1836, batteries have become a common power...
(to ensure programs are kept when the AAA batteries are being changed).
Design changes
The TI-82 was redesigned twice, first in 1999 and again in 2001. The 1999 redesign introduced a design very similar to the TI-73 and TI-83 Plus, introducing a more contoured body, and eliminating the sloped screen that has been common on TI graphing calculators since the TI-81. The 2001 redesign (nicknamed the TI-82 "Parcus") introduced a slightly different shape to the calculator, eliminated the glossy screen border, and reduced cost by streamlining the printed circuit board to four units.Technical specifications
CPUCentral processing unit
The central processing unit is the portion of a computer system that carries out the instructions of a computer program, to perform the basic arithmetical, logical, and input/output operations of the system. The CPU plays a role somewhat analogous to the brain in the computer. The term has been in...
- Zilog Z80Zilog Z80The Zilog Z80 is an 8-bit microprocessor designed by Zilog and sold from July 1976 onwards. It was widely used both in desktop and embedded computer designs as well as for military purposes...
CPU, 6 MHz
RAM
Random-access memory
Random access memory is a form of computer data storage. Today, it takes the form of integrated circuits that allow stored data to be accessed in any order with a worst case performance of constant time. Strictly speaking, modern types of DRAM are therefore not random access, as data is read in...
- 28 KBKilobyteThe kilobyte is a multiple of the unit byte for digital information. Although the prefix kilo- means 1000, the term kilobyte and symbol KB have historically been used to refer to either 1024 bytes or 1000 bytes, dependent upon context, in the fields of computer science and information...
Display
Electronic visual display
An electronic visual display is display technology which incorporates flat panel displays, performs as a video display, output device for presentation of images transmitted electronically, for visual reception, without producing a permanent record....
- Text: 8 Rows × 16 characters
- Graphics: 96×64 pixels, monochrome
I/O
I/O
I/O may refer to:* Input/output, a system of communication for information processing systems* Input-output model, an economic model of flow prediction between sectors...
- Link port
Power
Electric power
Electric power is the rate at which electric energy is transferred by an electric circuit. The SI unit of power is the watt.-Circuits:Electric power, like mechanical power, is represented by the letter P in electrical equations...
- 4 AAA batteriesAAA batteryA triple A or AAA battery is a standard size of dry cell battery commonly used in portable electronic devices. A carbon-zinc battery in this size is designated by IEC as "R03", by ANSI C18.1 as "24", by old JIS standard as "UM 4", and by other manufacturer and national standard designations that...
plus 1 CR1616/CR1620 lithium battery for backupBackupIn information technology, a backup or the process of backing up is making copies of data which may be used to restore the original after a data loss event. The verb form is back up in two words, whereas the noun is backup....
Integrated programming language
Programming language
A programming language is an artificial language designed to communicate instructions to a machine, particularly a computer. Programming languages can be used to create programs that control the behavior of a machine and/or to express algorithms precisely....
s
- TI-BASICTI-BASICTI-BASIC is the unofficial name of a BASIC-like language built into Texas Instruments 's graphing calculators, including the TI-83 series, TI-84 Plus series, TI-89 series, TI-92 series , TI-73, and TI-Nspire...
, AssemblyAssembly (programming)An assembly is a runtime unit consisting of types and other resources. All types in an assembly have the same version number.Often, one assembly has only one namespace and is used by one program. But it can span over several namespaces. Also, one namespace can spread over several assemblies...
(hacked memory backups)
External links
- Texas Instruments press release March 30, 1993
- ticalc.org – The largest archive of TI programs available.