Casio fx-6500G
Brief History
Based on the world’s first graphic calculator, CASIO created a whole family of such machines. An interesting member of this family was the fx-6500G with its vertically half-sized display. The calculator itself was identical with the fx-7000G. Caused by the smaller display the calculator was smaller and thinner than its famous predecessor. The small display draws the functions with half vertical resolution by default. But activating a special mode (MODE 0) the calculator sets the horizontal and vertical resolution to equal, therefore only a half of vertical (y) range is displayed.
The early CASIO graphics calculators were able to display statistical graphs as a new innovation. These calculators can display the values on bar graph and draw the normal distribution function in one-variable statistic mode (SHIFT MODE X (SD2)), or the regression line in two-variable mode (SHIFT MODE ÷ (LR2)).
| Manufacturer: | CASIO Computer Co., Ltd. (Japan) |
| Mfg. date: | 1986-87 |
| Size: | 8×14,8×1 cm |
| Weight (ready for operate): | n.a. |
| Type: | programmable scientific |
| Capacity: | 10/10+2 digits (input/display) 13+2 digits (internal precision) |
| Operating logic: | formula-interpreting |
| CPU: | NEC D1007G 003 |
| Registers: | 8 standard (with saving the pending operation) 20 bracket (with saving the pending operation) maximum of 86 memory (with aritmetic) |
| Features: | +/-change sign (direct entry of negative numbers) Ffloating-point notation Fixfixed-point notation: the listed decimals can be chosen (0-9) Sciscientific (exponential) notation Engengineering notation BSbackspace (right-shift) function Sqrsquare root x2square 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) 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 LRtwo-variable statistics: linear regression P-Rconverting coordinates between rectangular and polar systems n!factorial |
| Display: | 96×32 digit dot-matrix LCD |
| Power: | 3×CR2032 cells |
| Programming method: | merged keystroke-programmable |
| Program capacity: | maximum of 486 steps |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.00000029128 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.00680420639E-70 |
Mode display of the fx-6500G
Inside of the fx-6500G with the main CPU and the memory chip
Inside of the fx-6500G: the keyboard and display control circuits
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