| 词条 | TI-73 series |
| 释义 |
|name = TI-73 |image = Ti_73_Graphing_Calculator.jpg |caption = Ti-73 |type = Graphing calculator |entry = D.A.L. |manufacturer = Texas Instruments |introduced = 1998 |discontinued = |predecessor = TI-80 |successor = TI-73 Explorer |processor = Zilog Z80 |frequency = 6 MHz |memory_user = 25 KB RAM 64 KB flash ROM |memory_rom = 512 KB |display = 96×64 pixels, 16×8 characters |precision = |link = |prog_lang = TI-BASIC |supply = 4 AAA's, 1 CR1616 or CR1620 | weight = {{convert|182|g|oz}} | dimensions = {{convert|7.2|x|3.2|x|0.80|in|mm|abbr=on|disp=flip}} }}{{Infobox Calculator |name = TI-73 Explorer |image = TI-73-Explorer.jpg |caption = |type = Graphing calculator |entry = D.A.L. |manufacturer = Texas Instruments |introduced = 2003 |discontinued = |predecessor = TI-73 |successor = |processor = Zilog Z80 |frequency = 6 MHz |memory_user = 25 KB RAM 128 KB flash ROM |memory_rom = 512 KB |display = 96×64 pixels, 16×8 characters |precision = 14 |link = |prog_lang = TI-BASIC |supply = 4 AAA's, 1 CR1620 | weight = {{convert|182|g|oz}} | dimensions = {{convert|7.2|x|3.2|x|0.80|in|mm|abbr=on|disp=flip}} }} The TI 73 series is a series of graphing calculators made by Texas Instruments, all of which have identical hardware. The original TI-73 graphing calculator was originally designed in 1998 as a replacement for the TI-80 for use at a middle school level (grades 6-9). Its primary advantage over the TI-80 is its 512 KB of flash memory, which holds the calculator's operating system and thereby allows the calculator to be upgraded. Other advantages over the TI-80 are the TI-73's standard sized screen (as opposed to the TI-80's smaller screen), the addition of a link port, 25 KB of RAM (as compared to the TI-80's 7 KB of RAM), and a faster 6 MHz Zilog Z80 processor (as compared with the TI-80's 980 kHz proprietary processor). The TI-73 also uses the standard 4 AAA batteries with a lithium backup battery (instead of the TI-80's 2 CR2032 lithium batteries). In 2003, the TI-73 was redesigned with a sleek new body shape and redesignated the TI-73 Explorer to indicate its currently intended use as a bridge between the TI-15 Explorer and similar calculators and the TI-83 Plus, TI-84 Plus, and similar calculators. Later, the TI-73 Explorer was remodeled to resemble the TI-84 Plus graphing calculator more closely. Due to lack of demand in middle schools, the TI-73 and TI-73 Explorer have not been huge sellers for TI and are not carried by most retail stores. Most American upper-level middle school algebra courses generally tend to use the TI-83 or TI-84 families instead of the TI-73 or TI-73 Explorer, while most basic middle school math courses generally do not use graphing calculators, instead opting for scientific calculators such as the TI-30 or TI-34 families. Originally the TI-73 could only run programs written in TI-BASIC, although that has changed in recent years. In 2005 an assembly shell called Mallard was released for the TI-73. Mallard allows the user to run programs written in assembly language. As with the TI-82 and the TI-85 before, a hacked backup file is downloaded containing the assembly shell. Released in late 2008, the Windows utility Chameleon allows a user to load the TI-73 Explorer with a slightly modified TI-83+ firmware, giving it nearly equivalent functionality. In 2009, Texas Instruments updated the skin of the TI-73 Explorer to match the shape of the larger TI-84 Plus's case. This resulted in a slight increase in mass from 182 grams to 208 grams. The hardware and software remained unchanged and is identical to an older unit wearing the TI-83 plus style casing. [1]Technical specifications
Sources1. ^{{cite web | last = Wilson | first = Brandon | title = Chameleon - ticalc.org | date = Feb 24, 2009 | url = http://www.ticalc.org/archives/files/fileinfo/416/41660.html | accessdate = May 12, 2009}} See also
External links
4 : Graphing calculators|Texas Instruments programmable calculators|Products introduced in 1998|Z80 |
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