Comparison
Híradástechnika TK-835 | EMG HUNOR 81C | |
Manufacturer: | Híradástechnika Szövetkezet (Hungary) | Elektronikus Mérőkészülékek Gyára (Hungary) |
OEM: | Bowmar-Ali Inc. (USA) | |
OEM model: | MX-140 | |
Mfg. date: | 1974 | 1977 |
Size: | 7,8×13,2×3,7 cm | 18,2×20,8×5,9 cm |
Weight (ready for operate): | 262 g | 960 g |
Price: | HUF 24.000 (HT, MIGÉRT, 1974) | |
Type: | scientific | four-function desktop |
Capacity: | 10/10+2 digits (input/display) 10/10+2 digits (internal precision) | 8 digits (input/display) 8 digits (internal precision) |
Operating logic: | algebraic | arithmetic |
CPU: | MOS MCS2525 002 + MCS2526 002 | Texas Instruments TMS0105NC |
Registers: | 2 standard (with saving the pending operation) 2 bracket (with saving the pending operation) 1 memory (with aritmetic) | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) |
Features: | +/-change sign (direct entry of negative numbers) RVexchange registers (X-Y) Ffloating-point notation 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) logexponential and logarithmical functions (10- and e-base) yxraising to power | +/-change sign (direct entry of negative numbers) Ffloating-point notation Fixfixed-point notation: the listed decimals can be chosen (0, 2) |
Display: | 10+2+2 digit LED (Bowmar Optostic) | 8+1 digit VFD (9×NEC LD8035E) |
Power: | 6×AA NiCd rechargeable battery (built-in) chargeable with E-69 adaptor | 220V AC rechargeable battery (optional) |
Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.063296 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.00704092E-70 |