New-to-me HP-71B

[Valentin Albillo]

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Hi, congratulations on your new acquisition, the wonderful HP-71B, the best HP calculator of them all (though the HP-15C and the HP42S are close behind).

To try and test it to the max, you may want to have a look at the following Articles I wrote which extensively discuss and feature the HP-71B:

Long Live the HP-71B, (full description and history, includes a Text Stereograms generator program)
HP-71B Modest Mater, (program to solve Mate-in-N chess problems)
HP-71B Math ROM Bakers Dozen (Vol. 1), (many tips and useful code snippets, first part)
HP-71B Math ROM Bakers Dozen (Vol. 2), ((many tips and useful code snippets, second part))
HP-71B Short and Sweet Sudoku Solver, (program to solve any Sudoku puzzle)
HP-71B Sudoku Solver Sublime Sequel, (enhancement to the program to solve any Sudoku puzzle)
HP-71B Sudoku Generator and Coach, (program to generate new Sudoku puzzles and coach you to manually solve any puzzle)
HP-71B Fantastic FOUR, (multiprecision multiplication using Fast Fourier Transforms)
HP-71B Minimax Polynomial Fit, (program to fit a set of data to the very best possible polynomial)
25 years of Othello, (program to play Othello versus the machine)
Small Fry - Primes Acounting, (routine to very quickly count primes on a given interval with excellent accuracy)
Small Fry - Let's Be Rational, (routine to convert reals to fractions and find their continued fracton form)
Boldly Going - Matrix Square Root, (routine to compute the square root of a given matrix)
Boldly Going - Identifying Constants, (program to find the symbolic expression which results in a given value, with many uses)

Beside the above articles, all of which do include an HP-71B program, you can find the following four additional HP-71B programs written by me, just follow this link:

HP Calculator Programs:

HP Program VA710 - HP-71B Producing Digits of Pi one at a time

3-page paper featuring a 6-line proof-of-concept BASIC program written in 1996 for the HP-71B pocket computer to produce an arbitrary number of digits of Pi one at a time using a so-called spigot algorithm. A sample run computing 1,000 digits of Pi is given.

HP Program VA711 - HP-71B Exact Integer Determinants and Permanents

3-page paper featuring a 5-line BASIC subprogram for the HP-71B to evaluate determinants and permanents for real or complex NxN matrices. Unlike other methods where floating-point divisions are involved, if the elements are moderately-sized integers the integer results will be exact, even for singular or very ill-conditioned matrices. Two worked examples are included.

HP Program VA712 - HP-71B Multiprecision E and its roots

3-page paper featuring a 5-line BASIC program I wrote in 1990 for the HP-71B which can quickly compute up to 35,500 digits of Euler’s constant e and its roots (square root, cubic root, etc.). Five worked examples are included.

HP Program VA713 - HP-71B Packing Long Integers

3-page paper featuring a small assembly-language LEX file written in 1991 for the HP-71B pocket computer to pack long integers in the range from 0 to 16,777,215 into 3-character strings and, conversely, to unpack a 3-character string into the equivalent long integer value.

Best regards and enjoy !
V.