I’m still making progress towards a new release on Nonpareil.  Sometimes it seems like the more work I do, the more I find that needs to be done.

Henry Horn was the editor of HP Key Notes.  He was very well known in the HP calculator user community, and will be missed.

It appears that a retailer has spilled the beans on a soon-to-be-introduced HP 35s calculator. HP had said to expect a new model to commemorate the 35th anniversary of the introduction of the HP-35, the world’s first handheld scientific calculator. Apparently the 35s and a new 10s will be introduced tomorrow in Monaco.
Compared [...]

Several people have inquired about the status of Nonpareil, so it’s time for an update.
There are major changes in progress that are mostly “under the hood.” The released versions of Nonpareil install KML, image, and ROM files in a library directory (or with the Program Files in Windows). There has been no clear [...]

This is just a minor release to fix build problems.  Two missing semicolons were added to src/kmly.y because some versions of Bison complained about them.  The GDK initialization in src/str2png.c was replaced with GObject initialization, so that str2png doesn’t require an X server to be present at Nonpareil build time.
There is no change to the [...]

I just committed the KML files and graphics for the HP-22 and HP-27, the graphics being based on Maciej Bartosiak’s graphics for other models.  I have poor graphic art skills, so the 27 artwork could be better.  But at least there’s finally something; I’ve had the ROM dumps for a long time but without suitable [...]

I haven’t written about Nonpareil in over six months. There’s been some progress, but it’s been very slow due to work and school. I’ve been improving the build system (SCons-based), and hacking up a new “Cbutton” widget for the calculator buttons and slide switches, based on the GtkButton widget. This will allow [...]

Actually it is fun, though a bit tedious. My HP-49G+ calculator, or Mathematica or Maple on my laptop, can of course determine Eigenvalues and Eigenvectors automatically, but the point of today’s Linear Algebra class (and Monday’s quiz) is to learn how to do it ourselves.
Computing an matrix of cofactors (and its transpose, the adjoint) [...]

Last December I bought an Epson Stylus Photo R300 inkjet printer, because it was on sale for under $80, and it can print directly onto printable CDs and DVDs. I didn’t actually get around to using it for that until just now. It works great!

Thanks to a ROM image and code provided by HrastProgrammer, Nonpareil will soon support its first non-RPN calculator, the TI-57.
Since non-RPN calculators (even the HP-01 and HP-10) aren’t really consistent with the name Nonpareil, I’ve decided to put them into an optional “downgrade pack”.
I’m not sure whether the TI-57 will make it into the next [...]