Híradástechnika PTK-1050
Brief History
In 1977, Texas Instruments issued a line of programmable scientific calculators: the entry-level model (TI-55 and this italian equivalent, SR-51-II)
was taken over as PTK-1030, the most powerful TI-59 as PTK-1096 in 1978-79, and the third, middle-level model (TI-57) had been assembled
from 1980 as PTK-1050. This model was a very popular calculator which was produced until 1984. This type of calculator became the first official, country-wide
educational-purpose calculator for teaching computer technology and programming in the secondary schools, where computers were not available.
| Manufacturer: | Híradástechnika Szövetkezet (Hungary) |
| OEM: | Texas Instruments https://www.topbreitling2uk.com/ (USA) |
| OEM model: | TI Programmable 57 |
| Mfg. date: | 1980-84 |
| Size: | 8×14,7×3,4 cm |
| Weight (ready for operate): | 185 g |
| Price: | HUF 4.590 (HT, 1980) |
| Type: | programmable scientific |
| Capacity: | 8/8+2 digits (input/display) 11/11+2 digits (internal precision) |
| Operating logic: | AOS |
| CPU: | Texas Instruments TMC1501NL |
| Registers: | 3 standard (with saving the pending operation) 9 bracket 8 memory (with aritmetic) |
| Features: | +/-change sign (direct entry of negative numbers) Ffloating-point notation Fixfixed-point notation: the listed decimals can be chosen (0-7) Sciscientific (exponential) notation Sqrsquare root x2square pivalue of pi (3.1415..) can be recalled 1/xreciprocal trigtrigonometrical functions (sin, cos, tan and inverses: arcsin, arccos, arctan) DMS-DDconversion of decimal and sexagesimal numbers logexponential and logarithmical functions (10- and e-base) yxraising to power SDone variable statistics: calculating mean and standard deviation P-Rconverting coordinates between rectangular and polar systems |
| Display: | 8+2+2 digit LED (Texas Instruments) |
| Power: | Texas Instruments BP-7 battery pack (replaceable) with E-05A charger |
| Programming method: | merged keystroke-programmable |
| Program capacity: | 50 steps |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.006046807 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.0069446892E-70 |
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