plot_orig: raw txt | Original version of PLOT from the HP-42S manual.
Plots a function on an HP-82240 printer. |

plot_thomas: raw txt | Modified version of PLOT; like the original, with SOLVE support added. |

miscfn: raw txt | 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 txt | Original version of DPLOT from the HP-42S manual. |

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

cogo-42.zip | COGO-42 coordinate geometry package. Contributed by Mike Reed. |

cw-16-04-10d.zip | CW+ Pipe flow calculator using the Colebrook White equation.
May be of interest to Civil and Mechanical Engineers and practicioners. Documentation included in download. Contributed by Andrew Happ. |

CP4GC: raw txt | Construction of 4th degree monadic polynomial from two complex conjugated zeros, with documentation. Contributed by Günter Gaus. |

CP4GR: raw txt | Construction of 4th degree monadic polynomial from four real zeros, with documentation. Contributed by Günter Gaus. |

CP4GRC: raw txt | Construction of 4th degree monadic polynomial from two real and one complex conjugated zeros, with documentation. Contributed by Günter Gaus. |

G4G: raw txt | Monadic quartic equation solution, with documentation. Contributed by Günter Gaus. |

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