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| Type | Graphing calculator |
|---|---|
| Manufacturer | Texas Instruments |
| Introduced | 1992 |
| Discontinued | 1997 |
| Successor | TI-86 |
| Calculator | |
| Entry mode | D.A.L. |
| Display size | 128×64 pixels, 21×8 characters |
| CPU | |
| Processor | Zilog Z80 |
| Frequency | 6 MHz |
| Programming | |
| User memory | 28 kB of RAM |
| Other | |
| Power supply | 4 AAA, 1 CR1616 or CR1620 |
The TI-85 is a graphing calculator made by Texas Instruments based on the Zilog Z80 microprocessor. Designed in 1992 as TI's second graphing calculator (the first was the TI-81), it was replaced by the TI-86, which has also been discontinued.
The TI-85 was significantly more powerful than the TI-81, as it was designed as a calculator primarily for use in engineering and calculus courses. Texas Instruments had included a version of BASIC on the device to allow programming. Each calculator came with a cable to connect calculators (simply a three-conductor cable with 2.5 mm phone connectors on each end). Another cable known as the TI-Graph Link was also sold, along with appropriate software, to connect the calculator to a personal computer. These cables made it possible to save programs and make backups.