How to Use rpcCalc
Contents
Basics
If you know how to use an RPN calculator (like Hewlett-Packard models), you know how to use rpcCalc. It stores previous results in four registers (usually labeled X, Y, Z and T), and the numbers are entered before the operators.
The quickest way to enter numbers and the four basic operators is to use the number pad on the keyboard. For the other keys, the name on the key can be typed (not case-sensitive). What has been typed shows up in the box below the keys. The tab key may be used to automatically complete a partially typed command. Of course, the mouse may also be used to hit any key.
A few keys have unusual labels to allow them to be typed: "RCIP" is 1/X, "tn^X" is 10^X, "R<" rolls the stack back (or down), "R>" rolls the stack forward (or up), "x<>y" is exchange, "CLR" clears the registers, "DEG" toggles between degrees and radians, and "<-" is backspace.
A few commands ("STO", "RCL" and "PLCS") prompt for a number from zero through nine. This number will be the memory register number or the number of decimal places for the display.
Options for controlling the numeric display include the previously mentioned "PLCS" for entering the number of decimal places, and "SCI", which toggles between normal and scientific notation. There is also the "SHOW" command, which temporarily displays scientific notation with more than 12 significant figures, then goes back to normal when the next command (or a repeated "SHOW" command) is given.
Information Window
An information window is displayed if the "INFO" command is given. Initially, this shows the contents of the four registers and the ten memory registers. Typing an "H" changes it to a history view, showing equations for recent calculations. Typing an "R" takes it back to the register view. Any other key closes the info window, going back to the calculator.