Radio Shack EC-4000
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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Radio Shack EC-4000
Radio Shack's first programmable calculator (as far as I know) is a well-known model: none other than the venerable TI-57, Texas Instrument's first full-featured "budget" programmable machine. The only difference is the OEM labelling: otherwise, the EC-4000 is a TI-57 inside and out.
Rather than repeating my Gamma function programming example on this page, here is a simpler one: an implementation of the factorial. This program also demonstrates many of the features, including the merged programming model, if this vintage calculator.
00 86 0 LBL 0 01 32 0 STO 0 02 01 1 03 86 1 LBL 1 04 55 × 05 33 0 RCL 0 06 56 DSZ 07 51 1 GTO 1 08 85 = 09 -61 INV SBR