|Calculator site update - 2005/05/16|
Message #1 Posted by Valentin Albillo on 16 May 2005, 12:46 p.m.
I've just updated my still fledgling (time, time!) calculator-related site, which you can access using
this link, to include a couple of my HP-related articles featured in past Datafile issues, and now made publicly available online on my site.
All of them do include a program, full documentation and examples, and as of now you can find the following articles there:
- HP-11C: Long Live the HP-11C !
5-page article, includes an 84-step program which will quickly and accurately find the limit sum of any user-defined
infinite alternating series, no matter how slowly it does converge (if at all).
- HP-12C: Long Live the HP-12C !
6-page article, includes a 72-step program which will play a challenging game of Bridge-It! against the user.
- HP-12C: Tried & Tricky Trigonometrics
10-page article, includes a 99-step program which evaluates all six trigonometric functions (sin, cos, tan and their
inverses) very quickly and with full accuracy over an extended range of arguments.
- Time Voyager
An HP-related short story, in memoriam of Sir Isaac Newton.
- HP-12C: Serendipitous Solver
8-page article, includes a 37-step program which makes use of the built-in machine code solver and a number of
financial functions to find a real root of polynomials up to 14th-degree (up to 1480th-degree or more if there are
groups of repeated coefficients). The program can also evaluate the polynomial for given arguments. Both root
finding and evaluation are implemented using built-in financial functions. without user-code loops or branching.
- HP-15C: Long Live the HP-15C !
6-page article, includes a 64-step program which will compute and store the value of Euler's constant e
(=2.71828+) up to 208 decimal digits, using matrix operations.
- HP-15C: Nth-degree Polynomial Fitting
7-page article, includes a 42-step program which will compute explicitly the coefficients of a polynomial of degree
N (for 2 <= N <= 6), which exactly fits (passes through) a given set of data points (x,y).
- HP-41C: Long Live the Advantage ROM !
8-page article, includes the 62-step HP-41C/Advantage ROM version of the HP-15C program featured in "HP-15C: Nth-degree Polynomial Fitting", extended to handle degrees much higher than 6.
- HP-71B: Modest Mater
12-page article, includes a relatively short BASIC program for the HP-71B that, given a typical 'Mate-in-N-moves'
problem chess position, will recursively search for the solution. Full explanation of its inner workings is provided, as
well as two complete, amazing examples.
- HP-42S: Long Live the HP-42S !
14-page article, includes a long and "professional-looking" program to solve the classic '8-Queen Puzzle',
incorporating a number of important techniques such as menus, error control, alphanumeric and graphic outputs,
user ergonomy, and other advanced techniques, all from a didactic viewpoint. Full explanation of its inner workings
is provided, as well as a complete run including all 92 solutions and the filtered subset of the 12 primary ones.
- HP-71B: Math ROM Baker's Dozen (Vol. 1)
10-page article, first part of a two-part article featuring 13 assorted mini-topics discussing novel, unusual, or
otherwise interesting aspects of using the extremely powerful and versatile Math plug-in ROM for the HP-71B.
Hope they make interesting reading. I'll keep updating my site with new articles in the near future, as time permits.
Best regards from V.