Emu48 for Android

Emu48 is an Android application that serves as an emulator for the HP 48 series of calculators. This program allows users to experience the functionality of these calculators on their mobile devices, making it a suitable tool for both students and professionals who require advanced calculation capabilities. Users can download Emu48 to access a range of features designed to replicate the original calculator experience.

The application is built on the original Emu48 source code created for Windows, ensuring a familiar interface for those who have previously used the desktop version. The development utilizes the Android NDK, which facilitates the porting process while maintaining the integrity of the original code. Emu48 operates using a win32 emulation layer above Linux/NDK, allowing it to seamlessly handle the core functionalities of the original software.

One of the primary features of Emu48 is its ability to open and save state files that are identical to those generated by the original Windows application. This functionality is crucial for users who need to retain their work across sessions. The state files, specifically state.e48 and state.e49, allow for a smooth transition between the Android and Windows platforms, enhancing user convenience.

In addition to its emulation capabilities, Emu48 supports the inclusion of KML scripts, which are essential for customizing the calculator experience. The application comes pre-loaded with several KML files that contain faceplates, enabling users to personalize the appearance of their calculators. For those who wish to expand their options, the app allows users to open a KML file and its dependencies by selecting a folder from the device. However, it is important to note that Android 11 users cannot utilize the Downloads folder for this purpose.

Emu48 does not request any permissions from users, as it utilizes the content:// scheme to access files and folders. This approach ensures that users can enjoy the app without compromising their privacy or device security. The design prioritizes user experience, making it straightforward to navigate through options and select the desired calculator functions.

Setting up Emu48 is a simple process that involves a few steps. Users can start by clicking on the three dots button located at the top left of the screen or by sliding their finger to open the menu. From there, selecting the "New..." menu item leads to a prompt where users can choose a default calculator or opt for a custom KML script folder. Once the appropriate selection is made, the calculator interface opens, ready for use.

While Emu48 boasts a variety of features, certain functionalities are not yet operational. Specifically, the disassembler and debugger features are currently unavailable, which may limit some advanced users in their computational tasks. Nonetheless, the core emulation features remain intact, allowing users to perform calculations and utilize the calculator's built-in functions effectively.

The application is distributed under the GNU General Public License, which allows for redistribution and modification under specific terms. This licensing ensures that users have the freedom to utilize and adapt the software as needed, fostering a community of developers and users who can contribute to its ongoing enhancement. However, some files included with the application, such as ROM image files and certain KML files, are not covered by the GPL and remain under their respective copyrights.

Emu48 is a versatile tool for anyone needing access to HP 48 series calculator functions on the Android platform. Its ability to emulate the original calculator experience, coupled with the option to customize through KML scripts, makes it a valuable resource for those in academic or professional settings. Users can efficiently perform calculations, save their work, and personalize their calculators without encountering intrusive permissions or complex setup processes.

The application effectively combines the functionality of traditional calculators with the convenience of mobile devices, appealing to a broad audience. With ongoing updates and community support, Emu48 continues to serve as a reliable option for users seeking a calculator emulator on Android devices.

For further details and source code, interested users can visit the GitHub repository: https://github.com/dgis/emu48android.