Texas Instruments TI-15
Brief History
Several manufacturer increased their profit by assemble different models with the same interior electronics, and achieving some function was restricted only to more expensive types. One of the most interesting example is the colorful TI-15 from Texas Instruments, which machine is really a full scientific TI-30 introduced a year earlier, but it lacked all of transcendental functions. The button assemblies are the same, so behind the keyplate, all buttons may be operated. This model was only manufactured in Italy, and made for european market only.
| Manufacturer: | Texas Instruments (USA/Italy) |
| Mfg. date: | 1977 |
| Size: | 8×14,7×3,4 cm |
| Weight (ready for operate): | n.a. |
| Type: | extended four-function |
| Capacity: | 8 digits (input) 8/5+2 digits (display) 10+2 digits (internal precision) |
| Operating logic: | AOS |
| CPU: | Texas Instruments TMC0981NL |
| Registers: | 3 standard (with saving the pending operation) 1 constant (with saving the pending operation) 15 bracket (with saving the pending operation) 1 memory (with aritmetic) |
| Features: | %calculation with percent +/-change sign (direct entry of negative numbers) Ffloating-point notation Sciscientific (exponential) notation Sqrsquare root x2square pivalue of pi (3.1415..) can be recalled 1/xreciprocal |
| Display: | 9 digit LED |
| Power: | 9V battery |
TI-15
Inside of the TI-15
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