Software for HP42s

miscfn.raw: Original version of MISCFN from the HP-42S manual. Calculates (x/360) * sin(3*x) + 1; used to demonstrate the PLOT program. Set DEG and ALL modes; in PLOT, use YMIN=-0.5, YMAX=2, AXIS=0, XMIN=-360, XMAX=360, XINC=45.

dplot_orig.raw: Original version of DPLOT from the HP-42S manual.

dplot_thomas.raw: Modified version of DPLOT; like the original, with SOLVE support added.

wave.raw: Calculates sin(x) * sin(5*x). Used to demonstrate DPLOT. Set DEG mode; in DPLOT, use YMIN=-1, YMAX=1, AXIS=0, XMIN=0, XMAX=180.

gc.raw: SOLVE program to compute the Great Circle Distance between two points on the Earth. Coordinates should be entered in decimal degrees; distance is computed in kilometers.

sun.raw: SOLVE program to compute the height of the sun above the horizon. Variables used: TILT: the angle between the Earth's axis of rotation and the normal of the ecliptic (23.5 degrees); LAT: observer's latitude (use positive values for Northern latitudes, negative values for Southern latitudes); SEAS: the current season, given as an angle between 0 and 360 degrees, with 0 being mid-winter in the Northern hemisphere, 90 being the Northern Spring equinox, etc.; TOD: time of day (solar time, from 0-24, where 12 is noon; solar time differs from official time, depending on where you are within your time zone); HGHT: height of the sun above the horizon, in degrees; negative numbers mean nighttime.

prm_dec.raw: Original version of Erik Ehrling's PRM? program. NOTE: this program relies on decimal math, and will NOT produce correct results on Free42 Binary.

prm_bin.raw: Modified version of PRM?; works with binary math, enabling it to run on Free42 Binary. Before using, store 2^20 in "E6" and 2^40 in "E12" (you can use 2^26 and 2^52, respectively, too; that way the program can work with even larger numbers).

diag.raw: Constructs band-diagonal matrices. Put the desired dimension in X, and put a vector containing the (off-)diagonal elements in Y. If the vector's length is odd, its middle element will go on the diagonal; if its length is even, the element just before the middle will go on the diagonal.

stress.raw: Not actually a functional program; just contains all the HP-42S instructions with all legal types of arguments. I used this to test the "raw" mode program import/export in Free42.

mast.raw: The classic Master Mind number-guessing game. Numbers can contain digits 1 to 6, with duplicates allowed. Results are displayed as B.W, with B the number of black pegs (right color AND right position), and W the number of white pegs (right color, wrong position). Use the "up" and "down" keys to scroll through the current game's history.

minehunt.raw: Minehunt game, similar to the built-in game on the HP-48. By Erik Ehrling.

rtmin.raw: A program that finds extrema and roots of arbitrary functions. Contributed by Namir Shammas; see here for documentation.

RootsEqns.raw: A program that solves multiple nonlinear equations. Contributed by Namir Shammas; see here for documentation.

mlran.raw: A program that performs multiple linear regression. Contributed by Namir Shammas; see here for documentation.

pi_dec.raw: Calculates up to 1110 Digits of pi on the HP-41, more on a 42S. Put the desired number of digits in X and do XEQ "PI". When done, the digits of pi will be stored in register 04 and up. See here for documentation and the program listing. NOTE: this program relies on decimal math, and will NOT produce correct results on Free42 Binary.

NikkelTaylorCadastral.zip: Cadastral Program, contributed by Tony Nikkel. (Blurb, Flyer, Installation Instructions. Note: these materials are also included in the download package.)

aes.raw, aesprep.raw: Advanced Encryption Standard, contributed by Brett Stevens. Program listing and documentation is here; the author's web page is here. Note: the aesprep.raw file contains a program that initializes registers 00-63 and 90-153 as described in the documentation; the aes.raw file contains the AES code itself.

Base.raw: ASCII, Hex, Decimal, and Binary conversions. See here for documentation. Contributed by Ton van de Burgt.

Convert.raw: Unit conversions. See here for documentation. Contributed by Ton van de Burgt.

Finance.raw: A collection of financial programs. See here for documentation. Contributed by Ton van de Burgt.

Triangle.raw: Calculate the sides and angles of a triangle. See here for documentation. Contributed by Ton van de Burgt.

ses.raw, sestest.raw: Simultaneous Equation Solver, based on an RPL program by Mike Ingle. See here for documentation.

RealEigenvalues.raw: Calculate real eigenvalues of a real-valued square matrix. Contributed by Pierre Gillet; see here for documentation.

G4_G3_G2.raw: Solves 2nd, 3rd, and 4th order polynomials. using closed-form solutions. Contributed by Christian Vetterli.

STATISTICS.raw: Statistics package, with four regression models, mean, standard deviation, median, extremes, chi-square and Student-t distributions, and more. There is some documentationhere. Contributed by William Solano.

days.raw: Calculate the number of days between dates. Contributed by Russ Jones.

ntrp.raw: Perform linear interpolation. Contributed by Russ Jones.

lrnc.raw: Perform learning curve calculations. Contributed by Russ Jones.

mort.raw: Perform mive value of money (annuity) calculations. Contributed by Russ Jones.

FWIW-1.0.zip: SHOW replacement that displays the contents of X in Free42's full 25 digits of precision. Includes an annotated listing. Contributed by Glen Sanft.

delsnider.zip: A collection of civil, road, and municipal programs. Contributed by Ken Delsnider.

Software for HP42s

Mathematics

Games

Programs for Free42s/Hp42s (taken from Thomas Okken website):

Other interesting HP42s related links: