Casio fx-3800P
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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With its 135 fully merged program step capacity, the fx-3800P could be a respectable high-end programmable calculator. Unfortunately, its generous program capacity is not accompanied by a sophisticated programming model; all that's in there is a simple branch capability, that allows jumping to the beginning of program space only. Worse yet, you cannot edit or view programs; all 135 steps must be entered "in the blind", and if you made a mistake, you can start from the beginning.
I first encountered this calculator in its OEM guise as the Radio Shack/Tandy EC-4019. It is on the EC-4019 that I developed the following programming example, which computes the Gamma function for positive arguments:
K1=76.18009173 K2=86.50532033 K3=24.01409824 K4=1.231739572 K5=1.208650974E-3 K6=5.395239385E-6 Min Kout 1 ÷ ( MR + 1 ) - Kout 2 ÷ ( MR + 2 ) + Kout 3 ÷ ( MR + 3 ) - Kout 4 ÷ ( MR + 4 ) + Kout 5 ÷ ( MR + 5 ) - Kout 6 ÷ ( MR + 6 ) + 1 = × ( 2 × π ) √ ÷ MR × ( MR + 5 . 5 ) xy ( MR + . 5 ) × ( MR + 5 . 5 ) +/- ex =