Casio fx-3650P

Infobox calculator
name = Casio fx-3650P


width = 200px
caption =
type = Scientific calculator
manufacturer = Casio
introduced = 2002
discontinued =
processor =
memory =
display = 2 line display

1st line-Dot Matrix

2nd line-LCD
precision = ±1 at the 10th d.p.
link =
prog_lang =
power = Solar cell and G13 Type (LR44) button battery two way power ["fx-3650P Users' Guide", Page E-52]

Casio fx-3650P is a programmable scientific calculator manufactured by Casio Computer Co., Ltd. It can store 12 digits for the mantissa and 2 digits for the exponent together with the expression each time when the "EXE" button is pressed. Also, the calculator can use the previous result to do calculations by pressing "Ans". ["fx-3650P Users' Guide", Page E-16]

Modes

The calculator is available in 6 modes: ["fx-3650P Users' Guide", Page E-8]

* Basic arithmetic calculations
* Complex number calculations
* Standard deviation calculations
* Regression calculations
* Base-"n" calculations
* Programs

Basic arithmetic calculations

* Arithmetic calculations ["fx-3650P Users' Guide", Page E-11]
* Fraction operations"fx-3650P Users' Guide", Page E-12]
** Fraction calculations
** Decimal↔fraction conversions
** Mixed fraction↔improper fraction conversions"fx-3650P Users' Guide", Page E-13]
* Percentage calculations
* Degrees, minutes, seconds calculations"fx-3650P Users' Guide", Page E-14]
* Rounding (Must be used with "Fix" decimal display mode)
* Trigonometric functions ["fx-3650P Users' Guide", Page E-21]
* Hyperbolic function"fx-3650P Users' Guide", Page E-22]
* Logarithm
* Natural logarithm
* Antilogarithm
* Differential calculus"fx-3650P Users' Guide", Page E-34]
* Integral calculus

Complex number calculations

In this mode, if the result have both real and imaginary part, an "R↔I" symbol will appear at the top-right corner. ["fx-3650P Users' Guide", Page E-17]

* Absolute value and argument calculations"fx-3650P Users' Guide", Page E-18]
* Rectangular↔polar form display
* Conjugate calculations ["fx-3650P Users' Guide", Page E-19]

Standard deviation calculations

This mode is for statistical calculation. For some input data, sum of squares of values (Σx²), sum of values (Σx), number of data (n), sample standard deviation (xσn-1) and population standard deviation (xσn) can be calculated. ["fx-3650P Users' Guide", Page E-25]

Regression calculations

This mode is for statistical calculation and can be divided further into ["fx-3650P Users' Guide", Page E-28]

* Linear regression: y=A+Bx"fx-3650P Users' Guide", Page E-32]
* Logarithmic regression: y=A+B*ln x
* Exponential regression: ln y=ln A+Bx
* Power regression: y=A+x^B
* Inverse regression: y=A+B/x"fx-3650P Users' Guide", Page E-33]
* Quadratic regression: y=A+Bx+Cx²

For some input ordered pairs, one of the below can be calculated"fx-3650P Users' Guide", Page E-28 & E-29] . (The availability differs from modes.)

Σx², Σx, n, Σy², Σy, Σxy, , xσn, xσn-1, , yσn, yσn-1, Regression coefficient A, Regression coefficient B, Correlation coefficient r, $hat\{x\}$, $hat\{y\}$, Σx³, Σx²y, Σx⁴, Regression coefficient C, $hat\{x\}$₁and $hat\{x\}$₂

Program

The calculator can hold up to 4 programs with total capacity of 360 btProgram commands ["fx-3650P Users' Guide", Page E-41] :

* ? - Operator input command, used when user's input is required. Usually used with →("variable")
* → - Assign to variable command, to assign the value before it to the variable after it. Always used as ("value")→("variable").
* : - Multi-statement separator, separate program statements.
* ◢ - Output command, output the value.
* $Rightarrow$ - Conditional jump, jump when conditions are met.
* = - Relational operator
* ≠ - Relational operator
* > - Relational operator
* $geqq$ - Relational operator.
* Goto - Unconditional jump, jump to label.
* Lbl - Label, jump destination.

Conditional jumps ["fx-3650P Users' Guide", Page E-42]

Conditional jumps should be used in the syntax:
"condition"$Rightarrow$"statement 1":"statement 2"
When "condition" is true, statement 1 is executed, then statement 2 is executed. If "condition" is false, statement 1 is skipped and statement 2 is executed.

E.g.:...A=0$Rightarrow$A+1→B:C+5→D:...If A=0, both A+1→B and C+5→D is executed. If A≠0, only C+5→D is executed.

Unconditional jumps ["fx-3650P Users' Guide", Page E-41]

Unconditional jumps uses Goto and Lbl to operate.

When Goto "n" (where n is an integer in 0-9) is executed, the program will jump to Lbl "n". Loops can be created with unconditional jumps.

System check

The calculator will perform system check when shift, 7 and ON is pressed together. The system check have 3 parts.

Part 1: light check - All lights will be on when the system check is initiated, press shift then all lights will be off. Press shift to proceed. The next 2 screens have similar functions.

Part 2: display check - The dot matrix screen will display "24 PRG13" and the LCD screen will display "0000000000 ⁰⁰". Press shift to proceed. Then the display become "BBBBBBBBBB" and "1111111111 ¹¹". Then "CCCCCCCCCC" and "222222222 ²²" and so on up till "JJJJJJJJJJ""9999999999 ⁹⁹". Press shift to proceed to part 3.

Part 3: key check - Press shift, the LCD will display 1. Press alpha, up, down, left, right in order. The display will increase by 1 each time you press a button. Next, press MODE, prog, $extstyle\; int$dx, x^-1, x³, and so on up till Ans. When EXE is pressed, the display become "24 OK""13"(The display differs from version, the above is for version 4 of the calculator which is the latest version). Press ON to end the system check.

Glitch

There is a glitch in the calculator.

Enter 1M+:1$div$0 as a program.

Refer to the following table in this section.

Note that (col) means the column header. For example Fix (col) at column 0 is Fix 0.

The table is the code table for the glitch. For example, the code 85 refers to A and 76 refers to Fix 7.

# Run the program
# It will display "Math ERROR". press AC.
# Enter a number and press EXE
# Press up and some characters will display.

To translate the entered number to the characters:

# Put the left-most digit after 0 and refer to the table. That's the first character
# For the next 9 digits, group the numbers in two. Refer to the table and that shows the next 5 characters.(Note: If the number of digits is odd, a 0 is added next to the last digit)
# Then add some zeros. The number of zeros = 6-(number of characters generated by the above step).
# Lastly, Refer to the table for (number of total digits)-1, if it is a single-digit number, put a 0 BEFORE it. That's the last digit.

color|red|Warning: If the code you enter begins with 2, the calculator will reset. Even if it is not the case, the calculator will also reset in some rare occasions if you use this glitch.

To restore the calculator back to a normal state without risking reset, do NOT switch off the calculator or press ON after using any glitches, but call Mode Clear (SHIFT->MODE->2). Programs and memory of variables will be preserved, the calculator will be reset back to COMP mode + Degree mode, however.

References