GO-29 Help

Pocket Calculator

GO-29 SciRPN closely simulates the venerable HP-29C Programmable Pocket Scientific Calculator. The HP-29C was released in 1977 and sold for a MSRP of $195. Virtually indistinguishable from the real item in operation, GO-29 is a powerful yet simple retro calculator.

( Not yet on the App Store, available later this year. )


Capabilities At A Glance
  • RPN (Reverse Polish Notation)
  • Four stack registers
  • Thirty storage registers
    • 10 primary registers
    •  6 statistical registers
    • 14 indirect registers
  • Math, trigonometric, polar/rectangular, logarithmic, statistical, power functions
  • Copy and paste
  • Programmable, with subroutines, indirect addressing, annotated program listing, and memory for 99 program steps
  • Fast, slow or single step program execution
  • Three separate windows for stack/storage registers, keystroke log, and program source code
  • Program import via pasteboard or from other Apps
  • Program export via printer, email, pasteboard or to others Apps



This document is not an exhaustive reference manual; rather, it's a terse outline of the calculator's function and programming keys.

In this document normal calculator keys are shown in bold, such as +, or CHS, or 4, or Σ+. Most keys can perform two other functions, however, one labeled in blue and and one labeled in gold. To execute one of these functions you first touch the corresponding colored prefix key, either g or f, followed by the desired function key.

So to compute the sine of a number you'd touch two keys, the f prefix key followed by the 4 key. However, this document will simply show the key as sin: the font color implies which prefix character is used. Similarly, touching the two keys g and 4 executes the arcsine function sin-1. The only exception to this convention is when discussing programming and keycodes.

The PRGM-RUN switch controls the two basic calculator modes. In RUN mode, key presses are executed immediately and results shown in the calculator display area. In PRGM mode, key presses are stored in program memory for later execution. It's important to realize which mode the calculator is in, as it has ramifications that affect other operational characteristics of the device.

(As you'll learn later there are two variants of RUN mode, for three actual calculator modes.)





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