Casio fx-200P

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
Years of production: 1986  Display type: Numeric display  
New price:   Display color: Black  
    Display technology: Liquid crystal display 
Size: 6"×3"×½" Display size: 10+2 digits
Weight: 5 oz    
    Entry method: Algebraic with precedence 
Batteries: 2×"AA" alkaline Advanced functions: Trig Exp Lreg Cmem BaseN 
External power:   Memory functions: +/-/×/÷ 
I/O:      
    Programming model: Fully-merged keystroke entry 
Precision: 11 digits Program functions: Cond  
Memories: 7 numbers Program display:  
Program memory: 135 program steps Program editing:  
Chipset:   Forensic result:  

Casio fx-200P

fx200p.jpg (30649 bytes)For a long time, I believed that the fx-200P was an early programmable calculator from Casio, using a vacuum fluorescent tube display. Its model number is, after all, just one digit away from that of the legendary fx-201P.

In reality, the fx-200P turns out to be a somewhat more mundane second generation programmable, using an LCD display and a programming model that is common to many later Casio machines.

This programming model is demonstrated below by an implementation of my favorite example, the Gamma function: 

K2=2.5066282835
K3=92.207048452
K4=-83.177637083
K5=14.802831931
K6=-0.22084970795
Kin 1
/
Kout 3
X-Y
+
Kout 2
+
Kout 4
/
1
Kin+ 1
Kout 1
+
Kout 5
/
1
Kin+ 1
Kout 1
+
Kout 6
/
1
Kin+ 1
Kout 1
=
ln
Min
Kout 1
+
.
8
5
M-
ln
*
(
Kout 1
-
3
.
5
M+
MR