Intertronic SC-88P
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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Intertronic SC-88P
Haven't I seen this calculator calculator somewhere? Why, of course I have. The Intertronic SC-88P is physically identical to the Knight K-31A; both OEM calculators must have come from the same Taiwanese manufacturer.
They also use the same calculator chip: the Sharp LI3301A is perhaps the most popular integrated circuit used in OEM programmable calculators. It is a good calculator chip, to be sure, except for its limited programmability: its 40-step program space shares storage with memory registers, it has no branching or conditional capability, and it has that dreaded "feature" of zeroing out the display register when you begin program entry, making it impossible to enter an algorithm that produces an error on a zero argument.
The limited programming model of this machine makes it impossible to implement complex algorithms. A sophisticated Gamma function implementation is therefore beyond the machine's capabilities, but Stirling's formula fits easily into the calculator's memory:
x-M 1 M+ ÷ RM ÷ 1 2 + 1 = × RM yx RM ÷ RM ex × ( 2 × π ÷ RM ) √ =