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Emu42 for Android
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This project ports the Windows application Emu42 written in C to Android.
It uses the Android NDK. The former Emu42 source code (written by Christoph Giesselink) remains untouched because of a thin win32 emulation layer above Linux/NDK!
This win32 layer will allow to easily update from the original Emu42 source code.
It can open or save the exact same state files (state.e??) than the original Windows application!

This application does NOT come with the ROM files!
You will need KML scripts and ROM files already copied into your Android filesystem.
or can download the KML scripts from the original Emu42 Windows application archive (https://hp.giesselink.com/emu42.htm) and you can extract the ROM file from a real calculator (or be lucky on internet).
Be careful about the case sensitivity of the filename in the KML script (Linux is case sensitive, not Windows).

The application does not request any permission (because it opens the files or the KML folders using the content:// scheme).

The application is distributed with the same license under GPL and you can find the source code here:


1. From the left side, slide your finger to open the menu.
2. Touch the "New..." menu item.
3. "Select a Custom KML script folder..." where you have copied the KML scripts and ROM files.
4. Pick a calculator.
5. And the calculator should now be opened.


- The snapshots are made with the faceplates from Eric Rechlin.
- For technical reason, this application need the Android 5.0 (API 21).
- The Help menu displays Emu48's original help HTML page and may not accurately reflect the behavior of this Android version.
- When using a custom KML script by selecting a folder, you must take care of the case sensitivity of its dependency files.
- This Emulator does not include the ROM files or the KML files.
- To speed up printing, set the 'delay' to 0 in the calculator's print options.


Android version 5.0 or later.


The latest source code is available at https://github.com/dgis/emu42android


- Disassembler
- Debugger


Android version by Régis COSNIER.
This program is based on Emu42 for Windows version, copyrighted by Christoph Gießelink & Sébastien Carlier.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.


2019/07/18 16:01:15 Nick
Hi, I use the HP28S. It works very nice. Could you make a few enhancements? User adjusted fixed zoom. Right now I need to zoom in a little bit. Sometimes I shift the zoomed picture by accident whwn using the calculator. It would be nice to tap the top to switch to the left screen and back again by tapping in the top screen. Many thanks

2019/12/13 00:12:05 Regis
@Nick For the moment, you need to swipe left or right. There is a new setting to allow to pin the lcd screen when swipping (Settings/Overlapping LCD)...


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