Hp50g global min and max solver

[Gjermund Skailand]

The rom which I have included in the distribution is actually HP50-C rev 2.15 amended with the hpgcc using some additional flash. See http://www.hpgcc3.org for details.
It installs from the sd card like any other rom.
To make the upgrade worth the effort I'll throw in an additional linear matrix library with general eigenvalue solvers and matrix exponentials. This is far beyond what exist in rom for numerical solvers and at least 100x faster than the originals.
Any takers?
best regards
Gjermund