Free42

Free42 An HP-42S Calculator Simulator Free42 is a complete re-implementation of the HP-42S calculator and the HP-82240 printer. It was written from scratch, without using any HP code. You do not need any ROM images in order to use it, yet it is fully HP-42S compatible. Free42 is an Open Source pro...

Free42 -- An HP-42S Calculator Simulator

Free42 is a complete re-implementation of the HP-42S calculator and the HP-82240 printer. It was written from scratch, without using any HP code. You do not need any ROM images in order to use it, yet it is fully HP-42S compatible.
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 permission of the respective authors.

This initial release does not yet have a functioning print-out window (but printing to files is implemented); it does not yet support import/export of programs from/to files on the device (but import/export directly from/to a PC or Mac is implemented); and it does not yet support use of the pop-up keyboard for ALPHA mode text entry. These features will be added in following releases.