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/logarithmic functions
Fin: Financial functions
Grph: Graphing capability
Hyp: Hyperbolic functions
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
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: 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:

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```