Radio Shack EC-4034

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: 6½"×3½"×½" Display size: 96×64 pixels
Weight: 6 oz    
    Entry method: Formula entry 
Batteries: 3×"CR-2032" Lithium + 1×"CR-2032" Lithium Advanced functions: Trig Exp Hyp Lreg Grph Ab/c Cmem BaseN 
External power:   Memory functions:  
I/O:      
    Programming model: Formula programming 
Precision: 12 digits Program functions: Jump Cond Subr Lbl Ind  
Memories: 4(0) kilobytes Program display: Formula display  
Program memory: 4 kilobytes Program editing: Formula entry  
Chipset: Casio fx-7700G   Forensic result:  

Radio Shack EC-4034

ec4034.jpg (25933 bytes)Another OEM Casio calculator, the EC-4034 is an OEM version of the fx-7700G.

The program below, computing the Gamma function, demonstrates many of the features of this calculator: 

"X=":
? -> X:
1 -> Y:
Lbl 1:
X >= 0 => Goto 2:
X×Y -> Y:
X+1 -> X:
Goto 1:
Lbl 2:
e(ln ((1+(76.18009172+9.5E-9)/(X+1)-86.50532033/(X+2)+
24.01409824/(X+3)-1.231739572/(X+4)+
1.208650973E-3/(X+5)-5.395239384E-6/(X+6))×
√(π×2)/X)+(X+.5)× ln (X+5.5)-X-5.5)/Y