Free42 is a free re-implementation of the HP-42S scientific programmable RPN calculator, which was made from 1988 until 1995 by Hewlett-Packard. Free42 is a complete rewrite and contains no HP code whatsoever. At this time, the author supports versions that run on PalmOS, Microsoft Windows and Linux.
Copy Free42.exe to wherever you want it, e.g. create a directory "C:\Program Files\Free42" and put it there. When Free42 runs, it will create two additional files, Free42State.bin and Free42Print.bin (the calculator’s internal state, and the contents of the print-out window) in the same place where the executable is located. For convenience, create a shortcut to Free42.exe and put it on the desktop or in the Start menu.
Remove Free42.exe, Free42State.bin, Free42Print.bin, and any shortcuts you
have created to point to Free42.exe.
Free42 is (C) 2004-2005, by Thomas Okken
Contact the author at email@example.com
Look for updates, and versions for other operating systems, at
Updated On: 12.08.12