Valentin Albillo's "Boldly Going... Going Back to the roots" now for the HP-41 !

[Ángel Martin]

I'm back with some time records.

ZHALL (using Hall's method, one guess) takes about 1'15" on V41 in default speed, or about 3 seconds in TURBO mode. The root found is 1,854105967+J0, for which the function yields -0,000000006+J0
Without a comparison with your program one could argue all we're measuring here is the PC speed, so I prepared the attached RAW file with your code and tried it on V41. Unfortunately the execution never stops, I must be misinterpreting the user instructions? You indicate the program uses {R01, R26} for X but in the LBL EQ1 code it appears R24 is used instead?

On the other hand, ZSOLVE (using Newton's method, two guesses) gets into OUT OF RANGE trouble with the example f(z)=z^z - pi, I should look into it next.

Cheers,
ÁM