Privileg 1081ESR-E
Brief History
Quelle International offered a wide range of scientific calculators based on Rockwell integrated circuits before ones with liquid crystal displays were introduced. Privileg 1081ESR-E is one of the smartest model of these calculators, used Rockwell’s A4800 chip, a very obsolete and weird circuit: it can’t hide leading zeros, so all digits are displaying at least a zero, even in the exponent part of the LED display. So 60 is displayed as 60.0000000 00. In addition to standard functions, it can calculate hyperbolic functions too.
| Manufacturer: | Quelle International (West-Germany) |
| Mfg. date: | 1975 |
| Size: | 7,2×14,7×1,9 cm |
| Weight (ready for operate): | 170 g |
| Type: | scientific |
| Capacity: | 10+2 digits (input/display) 10+2 digits (internal precision) |
| Operating logic: | algebraic |
| CPU: | Rockwell LA4800PC |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 1 memory (with aritmetic) |
| Features: | +/-change sign (direct entry of negative numbers) RVexchange registers (X-Y) Fixfixed-point notation: the listed decimals can be chosen (9) Sciscientific (exponential) notation Sqrsquare root pivalue of pi (3.1415..) can be recalled 1/xreciprocal trigtrigonometrical functions (sin, cos, tan and inverses: arcsin, arccos, arctan) hyphyperbolic functions (sinh, cosh, tanh and inverses: ar sinh, ar cosh, ar tanh) logexponential and logarithmical functions (10- and e-base) yxraising to power |
| Display: | 14 digit LED (NSC NSA5140) |
| Power: | 2×AA-type battery 3V adaptor |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 59.999823 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.007737986E-70 |
1081ESR-E
Inside of the 1081ESR-E
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