HP-71B Equation Solver

[rprosperi]

Thanks J-F!!

I had found the files in the past, but w/o docs, were too complex to figure out.

I spoke with Eric last week when I saw this doc was coming, but had not noticed it had been scanned since then.

In my set of Joe's LEXes, the file containing these is "LEXCOL 71.lif" but my set may preceed the more widely distributed .zip file copy, where I think some filenames were simplified.

There is a video (somewhere...) of Chris saying the SOLVIT program for the 41 by Ted Beers was another predecessor/source of inspiration for his multi-variable solver, though the UI necessarily is a bit different and the equations are entered in FOCAL, not algebraic strings. I've just recently acquired a copy of this and will be posting it soon. Fortunately, since it was originally purchased from HP's User Library, it includes bar code, so program entry should be not so bad (the listing in the docs is in the TRACE mode with groups of instructions together on lines separated only where there are labels). Both of these have been long sought after in the community, so nice to be able to have them at last!