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- Abacus 2.03
- Copyright(c) 1997-2000, Dovcom
- All Rights Reserved
-
- Thank you for trying Abacus. Abacus is an RPN Financial calculator
- based on the HP-12C. It is also shareware. The evaluation period is
- 30 days. If you continue to use it after 30 days, you are required to
- register.
-
- ----------------------------
- How to Use an RPN calculator
- ----------------------------
- RPN(Reverse Polish Notation) is a convention by which values to be
- calculated are placed on a stack before being calculated. With an
- RPN calculator, you enter the values you wish to calculate before
- the operator.
-
- For instance, the simple calculation 5+10 on a standard(algebraic)
- calculator would be entered as: 5 + 5 =
- While on an RPN calculator, you would enter: 5 Enter 5 +
-
- Some more examples:
- 6 * (3 + 2): 3 Enter 2 + 6 *
- (6*2)+(9*5)+(23*2): 6 Enter 2 * 9 Enter 5 * + 23 Enter 2 * +
-
- It may seem awkward at first, but once you get the hang of it, RPN
- feels a lot more natural than algebraic.
-
- Example financial calculation:
-
- To find the payment for a $100,000 loan over 30 years at 8.25%
- interest, enter:
-
- 100000 PV - stores $100,000 as the 'present value'
- 0 FV - stores 0 as 'future value', how much you will owe
- after the term of the loan
- 30 Enter 12 X n - multiplies number of years(30) by the number of
- months in a year(12) and stores the result in
- n(term of loan)
- 8.25 Enter 12 / i - divide annual interest rate by the number of months
- in a year
- PMT - calculate payment
-
- Stuff you might miss:
-
- Tap on 'End' to toggle to Annuity due, tap on "Begin" to toggle back to
- ordinarity annuity.
- Tap anywhere else on the display to toggle between the segmented font
- and the normal Pilot calculator font.
-
- For the latest version of this and other Pilot apps, visit the our web
- page at: http://www.dovcom.com/
-
- ------------
- Registration
- ------------
- The registration fee for Abacus is $14(US). Registration entitles you
- to unlimited future upgrades of the registered version of the Abacus
- shareware product. There are a few ways to register:
-
- Credit Card:
- ------------
- Credit card orders are processed for us by PalmGearHQ. They offer several
- payment options, listed below.
-
- Web: http://www2.viaweb.com/pilotgearsw/abacus.html
- Email: software-orders@palmgear.com
- Phone: (800)741-9070 or (817)461-3480
- Fax: (817)640-6614
-
- Mail:
- -----
- To register by mail, send a check or money order for $14(US funds only)
- to:
-
- Dovcom
- P.O. Box 580
- Provo, UT 84603-0580
-
- NOTE: If you register via mail, you MUST include an email address or
- an additional $2 to cover the cost of the diskette and postage.
-
- ----------------
- Revision History
- ----------------
- 2.03 - Bugfix
- * Fixed a couple "special case" bugs in the 'n' and 'PV' functions
-
- 2.0 - Enhancement
- * Fixed a bug that could cause the IRR function to fail
- * Added a second keyboard to support several new functions
- * Split shift key to access original shifted keyboard as well as the
- new one
- * Added factorial button
- * Added amortization button
- * Added depreciation buttons (straight line, sum of years digits,
- declining balance)
- * Added stats buttons (mean, weighted mean, standard deviation)
- * Added backspace support - graffiti backspace character will delete
- last entered digit
- * Better support for values and operations entered via graffiti
-
- 1.11 - Bugfix - limited distribution
- * Fixed a bug that would return incorrect values when solving for i
- in certain circumstances.
-
- 1.10 - Bugfix/Enhancement
- * Fixed a bug that didn't allow entry of very large values (greater
- than about 4.2 billion)
- * Added cashflow buttons (CFo, CFj, Nj, NPV, IRR)
-
- 1.02 - Bugfix
- * Fixed a bug in the e^x that could return incorrect results when
- used with values less than 1. Functions affected: e^x, y^x, SQRT,
- financial functions.
- * Improved the speed of the exponential functions. Some calculations
- that took a couple seconds are now nearly instantaneous.
-
- 1.01 - Bugfix
- * Fixed a bug that could cause incorrect values to display for small
- numbers (<.1)
-
- 1.00 - First non-beta release
- * Converted source to "official" MetroWorks compiler, requiring
- substancial recoding of math functions.
- * Substancial performance improvements. The 'i' function, which used
- to take >6 seconds on a typical calculation, now returns a value
- in less than one second.
- * Substancial improvements in precision. Most calculations now result
- in a precision that is higher than the number of displayable
- characters.(15+ significant digits)
- * Added a "Places" menu which allows you to specify the number of
- decimal places to round the display to.
- * Added buttons to keypad: %Total, %Difference
- * Moved existing buttons around somewhat to accomodate the new buttons
- * Added a "shift" button and secondary keypad for additional functions
- * New buttons on secondary keypad: 12x, 12/, SQRT, e^x, LN
- * Fixed stack roll button - rolls down instead of up now
- * Clear All now clears X register as well as other registers
- * 'n' calculations now round up to nearest whole number to follow the
- 12C model
- * Calculations can now be made on the result of financial
- calculations without pressing "Enter" first
- * Error messages have been added for several invalid operations, such
- as Divide by Zero or Overflow
- * Minor cosmetic update made to LCD bitmap so that values entered by
- the user appear in the same location as values returned by Abacus
-
- 0.85b - Update/Bugfix
- * Improved interest rate function greatly much more robust
- * Added a "Working..." indicator so you can tell when Abacus is busy
- calculating a problem
- * Added a flashing 'UNREGISTERED' reminder to the shareware version
-
- 0.81b - Minor bugfix
- * Implemented interest rate function - a little slow, but faster than
- my 12C
- * Fixed percentage-button bug - for some reason I forgot to hook it up
- to anything so nothing happened when tapping on the button
-
- 0.8b - Initial public beta release