Casio FX-790P

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: Alphanumeric display  
New price:   Display color: Black  
    Display technology: Liquid crystal display 
Size: 6"×6"×½" Display size: 24 characters
Weight: 6 oz    
    Entry method: BASIC expressions 
Batteries: 2×"CR-2032" Lithium + 1×"CR-1220" Lithium Advanced functions: Trig Exp Hyp Lreg Cmem Snd 
External power:   Memory functions:  
I/O: Printer port, expansion port     
    Programming model: BASIC 
Precision: 12 digits Program functions: Jump Cond Subr Lbl Ind  
Memories: 7520(0) bytes Program display: Text display  
Program memory: 7520 bytes Program editing: Text editor  
Chipset:   Forensic result: 9.000007164  

fx790p.jpg (37452 bytes)Another Casio machine, the fx-790P represents a fairly successful blend between a traditional calculator and a BASIC-programmable handheld computer. All scientific calculator functions are available directly from the calculator keyboard, which is separate from the QWERTY keyboard used for entering BASIC instructions in program mode.

An unusual feature of the fx-790P is the built-in simulated assembler.

So here's yet again this somewhat boring example, a Gamma function program:

20 X=X+5
30 S=X* LNX-X+ LN(2*π/X)/2+1/12/X-1/360/X^3+1/1260/X^3/X^2
40 PRINT EXP(S- LN((X-1)*(X-2)*(X-3)*(X-4)*(X-5)))