Equation solvers, HP 41CV etc.

[rprosperi]

(12-03-2017 05:39 PM)Dieter Wrote:  ... the Advantage Pac's Solver is Mcode. So it cannot be copied to RAM, and I wonder if the HP Solve algorithm (or the Integrate code, for that matter) has ever been published.

The Advantage ROM uses a port of the HP-15C Solver. From the Advantage ROM Acknowledgements on p. 3:

Quote:The matrix operations in this pac were based on the CCD ROM, written by
W & W Software Products GmbH, 5060 Bergisch Gladbach 2, West
Germany.

The root-finding and numerical-integration routines in this pac were
adapted from those in the HP-15C by Firmware Specialists, Inc., 605 NW
5th Street #2A, Corvallis, Oregon 97330.

The original concept for the content and user interface of this pac was developed
by Chris Bunsen, Corvallis, Oregon.

It's easy to forget (today) that the Advantage Pac came out very late in the life of the 41, well after the 15C had been introduced. The company Firmware Specialists included several key ex-HP employees, so they likely were given access to the 15C code (nut MCODE) to create the 41C Advantage ROM port (also nut MCODE).