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

[Ángel Martin]

I see, well those pesky equations really get in the way to do a port of the code as-is, I guess it'll be a moot point reinventing the wheel you have already done.

I went back and checked the root-finding sections in the 41Z manual, it's been a while but it offers a couple of decent methods. I'll do a timing comparison to see how they fare compared to yours.

Cheers,
ÁM