NAME

rpn − reverse polish notation visual desk calculator

SYNOPSIS

rpn
 

DESCRIPTION

Rpn is a stack-based desk calculator with a screen-oriented front end.  This calculator is very similar, in many respects, to old Hewlett-Packard scientific calculators.  The available commands are listed in a menu at the top of the screen.  the first few elements of its computation stack are listed next.  At the bottom of the screen is a data entry area.  Rpn uses “reverse polish notation”, or stack-oriented commands.  Thus the basic syntax is arg arg op For example: 47 358 +

This command pushes two values on the stack (47 and 358), then applies the operation (+) to those two values.  Operands are popped from the stack and replaced by the result of the operation.  Items can be pushed onto the stack one at a time, or more complicated expressions can be entered all on one line: For example: 47 179 2 ∗ + or: 47 179 ∗ 2 +

Note that the previous two examples are different and produce different answers. 

ARITHMETIC OPERATIONS

+Addition

-Subtraction

∗Multiplication

/Division

modModulo

∗∗Exponentiation

+-Negation

1/xInverse

minMinimum of two arguments

maxMaximum of two arguments

absAbsolute value

maxuintGenerates the maximum unsigned integer

maxintGenerates the maximum signed integer

LOGICAL OPERATIONS

and (&)

or (|)

xor (^)

not (~)

shr (>>)Shift right

shl (<<)Shift left

STACK OPERATIONS

xySwap top two stack elements

copyPushes a copy of the top of stack

clrxClear x, the top of the stack

yClear y, the next to top of the stack

clrsClear the whole stack

clrm NClear register number N

sto NStore to register number N

sto+ NAdd to register number N

sto- NSubtract from register number N

rcl NRecall register number N to top of stack

disp DDisplay D places before decimal point.  Rpn uses exponential notation if a number can’t be display in this field width. 

octDisplay stack in octal

nooctRemove octal stack display

hexDisplay stack in hexadecimal

nohexRemove hexadecimal stack display

signed(unknown function)

unsigned(unknown function)

degDegree mode

radRadian mode

TRIG FUNCTIONS

sinSine

cosCosine

tanTangent

sinhHyperbolic sine

coshHyperbolic cosine

tanhHyperbolic tangent

asinArcsine

acosArccosine

atanArctangent

asnhArc-hyperbolic sine

acnhArc-hyperbolic cosine

atnhArc-hyperbolic tangent

piGenerate the constant pi

LOGARITHMIC FUNCTIONS

lnNatural log

logBase-10 log

lg2Base-2 log

expExponential

alogBase-10 exponential

alg2Base-2 exponential

STATISTICAL FUNCTIONS

s+Statistical accumulation.  This accumulates statistical data on two variables, X and Y, into numbered registers.  The functions var, sd and rms use this data.  Given a series of n correlated X and Y pairs, enter each pair in the x and y registers, and execute s+.  The data is accumulated as follows: sto 10 n sto 9 sum XY sto 8 sum Y∗∗2 sto 7 sum Y sto 6 sum X∗∗2 sto 5 sum X

s-This is the inverse of s+ and is used to remove incorrectly entered X-Y pairs. 

varThe variance of X and Y is computed in registers x and y, and also in registers 3 and 4. 

sdStandard deviation of X and Y is computed in registers x and y, and also in registers 3 and 4. 

rmsRoot-mean squared of X and Y is computed in registers x and y, and also in registers 3 and 4. 

MISCELLANEOUS FUNCTIONS

sqrtSquare root

gcdvGreatest common divisor

combCombinatorial ?? 

factFactorial

lrgnLagrange ?? 

trunTruncate

rounRound

randGenerate a random number

CONVERSION FUNCTIONS

d-rDegrees to radians

r-dRadians to degrees

r-pRectangular to polar (two dimensions)

p-rPolar to rectangular

r-sRectangular to spherical (three dimensions)

s-rSpherical to rectangular

KEYWORDS

calculator, stack, reverse polish notation

Sprite version 1.0  —  June 06, 1989