DB48X is a modern implementation of the Reverse Polish Lisp (RPL) language designed specifically for the SwissMicro DM42, DM32, and DM42n calculators. Created to enhance the user experience of the HP48 family, DB48X offers a rich set of data types and built-in functions, bringing powerful programming capabilities reminiscent of traditional HP calculators.

Project Vision

This project aims to evolve and perfect the functionalities of the HP48 series, delivering a successor that stays true to the spirit of its predecessors. Future plans include expanding compatibility to various ARM-based calculators, such as the HP50 series and HP Prime.

Key Features

• User-Friendly Experience: DB48X enhances the RPL programming language with variable-precision decimal numbers and an exhaustive library of equations and constants.
• Extensive Documentation: Integrated help is accessible directly within the calculator, providing instant guidance through features and commands.
• Simulation Capabilities: A fully tested simulator is available for macOS and Linux, enabling users to experiment and learn without needing the physical device. A browser-based version is also available for quick access and testing.

Community Engagement

DB48X has been showcased at prominent events like FOSDEM 2023 and FOSDEM 2024. A dedicated YouTube playlist featuring tutorials and demonstrations is available for those interested in learning more.

Built-in Documentation

DB48X features comprehensive built-in documentation accessible through specific key sequences or commands, ensuring users can easily navigate through its capabilities. Key areas covered include:

• Design Overview
• Keyboard Interaction
• Soft Menus

Whether looking to develop advanced mathematical programs or simply seeking a sophisticated calculating tool, DB48X serves as a powerful resource for users of SwissMicro calculators.