Sharp EL-9200C

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
Years of production:   Display type: Graphical display  
New price:   Display color: Black  
    Display technology: Liquid crystal display 
Size: 7"×3½"×1" Display size:  pixels
Weight: 10 oz    
    Entry method: Formula entry 
Batteries: 4×"AAA" alkaline Advanced functions: Trig Exp Hyp Lreg Grph Ab/c Cmem Mtrx 
External power:   Memory functions: +/- 
    Programming model: Formula programming 
Precision: 14 digits Program functions: Jump Cond Subr Lbl Ind  
Memories: 2(0) kilobytes Program display: Formula display  
Program memory: 2 kilobytes Program editing: Formula entry  
Chipset:   Forensic result: 9.000000098906  

el9200c.jpg (29004 bytes)The EL-9200C is a recent graphical calculator from Sharp. Of all the graphical calculators I've seen so far, this one appears to have the best, most readable LCD screen. Unfortunately, its programming model is similar to that of comparable models from Casio and Texas Instruments; in other words, the wonderful functional integration that was achieved by Hewlett-Packard in their HP-48 series machines is not present here. The EL-9200C also appears to be a fairly slow machine; there's a noticeable pause after every keystroke as you enter data. Program execution, however, is comparatively fast.

Of course it was yet another implementation of the Gamma function that I used to familiarize myself with the capabilities of this machine. One oddity: regardless of the amount of memory available, the length of each individual line of program code is limited to 160 characters. Because of this, some lengthy formulae, including the one I am using here, need to be broken up into parts.

Input x
Label 1
If x>0Goto 2
Goto 1
Label 2
e^(ln (g*G√(2π)/x)+(x+.5)*ln (x+5.5)-x-5.5)/y