Free42 is a re-implementation of the HP-42S calculator and the HP-82240 printer.
It is a complete rewrite, not using any HP code, and it does not require an HP-42S ROM image.
Free42 is an Open Source project. The executables and source code are released under the terms of the GNU General Public License, version 2.
All third-party code used in Free42 is either in the public domain, or licensed under terms compatible with GPLv2, or used with the authors' permission.
From version Free42 2.0.20:
MATA, MATB, and MATX should exhibit the same stack lift behavior as EDIT and EDITN, but didn't. Fixed.
All versions
March 12, 2018