Casio fx-6000G

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: 1986  Display type: Graphical display  
New price:   Display color: Black  
    Display technology: Liquid crystal display 
Size: 6"×3½"×1" Display size:  pixels
Weight: 5 oz    
    Entry method: Formula entry 
Batteries: 3×"CR-2032" Lithium Advanced functions: Trig Exp Hyp Lreg Grph Cmem BaseN 
External power:   Memory functions:  
    Programming model: Formula programming 
Precision: 13 digits Program functions: Jump Cond Subr Lbl Ind  
Memories: 78(26) numbers Program display: Formula display  
Program memory: 422 bytes Program editing: Formula entry  
Chipset:   Forensic result:  

fx6000g.jpg (31648 bytes)Along with the fx-7000G, the Casio fx-6000G has the proud distinction of being a member of the first family of graphing calculators ever produced.

For a reason that at first appeared inexplicable, I liked the fx-6000G at first sight, much more so than other, more advanced graphing calculators from Casio. I felt the same thing a while back, when I first came across the Casio fx-7500G. Why is it that I actually like these calculators while I often use the adjective "uninspiring" to describe many of their significantly more capable cousins?

I think I found the answer. The fx-7000G and later graphing models, the CFX-9800G and other color graphing calculators, or the recent Algebra FX 2.0 all have the appearance of a high-end graphing calculator. Yet their features are less well integrated, they are, to use an unscientific term, less "fun" to use than similar-looking models from HP or TI. The fx-6000G, on the other hand, has the somewhat unassuming size and appearance of a mere scientific calculator, albeit one with a somewhat larger-than-usual display. It is, in fact, a nice shirt-pocket machine but with graphical capabilities.

Whatever my reasons, I really did like this vintage machine. This should be evident from the fact that, in addition to my usual programming example of a simple Gamma function implementation, I also wrote another program, which uses the first to plot the Gamma function on the calculator's graphical display. In the example code below, Prog 0 computes the logarithm of the Gamma function using the last result (Ans variable) as its argument, whereas Prog 1 plots the Gamma function's graph for values between -5 and +5.

Prog 0
ln (2.506628283501+92.20704845211÷X-83.17763708288÷(X+1)+
   (X-.5)ln (X+3.85)-X-3.85→G
S<0⇒ln (-π÷Xsin πX)-G→G
Prog 1
Range -5,5,1,-20,20,5
Lbl 1
Z>0⇒Goto 2
Frac Z≠0⇒Goto 2
Goto 3
Lbl 2
Z<0⇒Frac (Int Z÷2)=0⇒Z+1
Prog 0
Z<0⇒Frac (Int Z÷2)=0⇒G÷Z→G
Abs G<20⇒Goto 5
Goto 3
Lbl 5
Plot Z,G
T=0⇒Goto 4
G×L<=0⇒Goto 4
Lbl 4
Lbl 3
Z<=5⇒Goto 1
Graph Y=0