Sharp EL-5500II
| 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/log 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: Li-ion rechargeable battery Lreg: Linear regression (2-var. stats) mA: Milliamperes of current Mtrx: Matrix support NiCd: Nickel-Cadmium recharg. batt. NiMH: Nickel-metal-hydrite rech. batt. Prnt: Printer RTC: Real-time clock Sdev: Standard deviation (1-var. stats) 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 |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Sharp EL-5500II
The Sharp EL-5500II is a vintage BASIC calculator. Like other Sharp models in the EL-5500 series, this calculator also has two distinct operating modes. In calculator mode, the numeric keypad functions as a powerful, but non-programmable scientific calculator. In BASIC mode, the calculator can store and execute one BASIC program (or several BASIC programs, but they must coexist in the same line number space.) Personally, I find the lack of integration between the BASIC computer and calculator personalities a serious drawback in these types of machines.
As usual, I wrote a Gamma function program to test the capabilities of this machine. This variant uses the modified version of Stirling's formula to compute the logarithm of the Gamma function:
10:INPUT X 20:G=1 30:IF X>5 THEN 70 40:G=G*X 50:X=X+1 60:GOTO 30 70:G=X*LN X-X-LN G+LN √(2*π/X) 80:G=G+((((1/1188/X/X-1/1680)/X/X+1/1260)/X/X-1/360)/X/X+1/12)/X 90:PRINT G
