Casio fx-180P
| Datasheet legend
Ab/c:
Fractions calculation
AC: Alternating current BaseN: Number base calculations Card: Magnetic card storage Cmem: Continuous memory Cond: Conditional execution Const: Scientific constants Cplx: Complex number arithmetic DC: Direct current Eqlib: Equation library Exp: Exponential/logarithmic functions Fin: Financial functions Grph: Graphing capability Hyp: Hyperbolic functions Ind: Indirect addressing Intg: Numerical integration Jump: Unconditional jump (GOTO) Lbl: Program labels LCD: Liquid Crystal Display LED: Light-Emitting Diode Li-ion: Lithium-ion rechargeable battery Lreg: Linear regression (2-variable statistics) mA: Milliamperes of current Mtrx: Matrix support NiCd: Nickel-Cadmium rechargeable battery NiMH: Nickel-metal-hydrite rechargeable battery Prnt: Printer RTC: Real-time clock Sdev: Standard deviation (1-variable statistics) Solv: Equation solver Subr: Subroutine call capability Symb: Symbolic computing Tape: Magnetic tape storage Trig: Trigonometric functions Units: Unit conversions VAC: Volts AC VDC: Volts DC |
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Casio fx-180P
An archetypical programmable calculator from Casio, the fx-180P has many of the distinguishing features found in the vast majority of non-graphing programmable Casio calculators. 38 merged program steps, 6 registers plus one "independent" memory, a simple programming model that nevertheless provides for conditional execution, and an uncluttered keyboard offering a comprehensive set of scientific and statistical functions characterize this model and many of its successors.
38 program steps is not a heck of a lot, but thanks to the merged programming model, it is sufficiently large for a quality implementation of my favorite programming example, the Gamma function. The program below uses the Lanczos-approximation to compute the logarithm of the Gamma function to (typically) 10 digits of precision for all positive arguments.
K2=2.5066284644 K3=41.41740453 K4=-27.063892494 K5=2.2393179633 K6=1.15Kin 1 / Kout 3 X-Y + Kout 2 + Kout 4 / 1 Kin+ 1 Kout 1 + Kout 5 / 1 Kin+ 1 Kout 1 = ln Min Kout 1 + Kout 6 M- ln * ( Kout 1 - 2 . 5 M+ MR
