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Texas Instruments
TI-30 SLR
1982-83
Texas Instruments
TI-30 Galaxy SLR
1984-87

Texas Instruments TI-30 Galaxy

Brief History
Designers at Texas Instruments imagined the educational purpose calculator of the future similar to the TI-66 which had been produced since 1983. They rearranged the keyboard, gave bigger buttons than its predecessors, production of the machines were started under the coproduction between Texas Instruments and Toshiba in 1984. The TI-30 Galaxy was sold under the name TI-35 Galaxy in the United States. A more stylish version with solar cells were introduced as TI-30 Galaxy SLR (US: TI-35 Galaxy SLR) in the same year. A year later italian factory started production of the battery-operated version using Texas' circuits instead of Toshiba ones.

Interesting function of these calculators is displaying pending operations on the left side of the display. New additional features such as conversion between sexagesimal and decimal degrees, rectangular and polar coordinates, or statistics mode with calculation of mean and standard deviation were used in these machines first in the TI-30 series.

Manufacturer:Texas Instruments (USA/Japan)
OEM:Toshiba Corporation (Japan)
OEM model:n.a.
Mfg. date:1984-87
Size:15,2×8,8×2 cm
Weight (ready for operate):n.a.
Type:scientific
Capacity:8/5+2 digits (input/display)
11+2 digits (internal precision)
Operating logic:AOS
CPU:Toshiba T6975AS
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) 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) 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 n!factorial
Display:8+1 digit LCD
Power:1×LR44 button cell
Test results:trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.000009718
exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.00688042E-70

TI-30 Galaxy

Inside of the TI-30 Galaxy: the main PCB with CPU
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