jrpn – HP-15C and HP-16C inspired calculator simulators

jrpn is a pair of calculator simulators inspired by Hewlett-Packard’s HP-15C scientific calculator and HP-16C Computer Scientist calculator. They reproduce the characteristic Voyager-style interface with a simulated seven-segment LCD and Reverse Polish Notation input.

The 15C-inspired calculator concentrates on scientific and engineering work. Its capabilities cover standard scientific calculations as well as more advanced operations associated with the original calculator, including complex-number, matrix, statistical and programming facilities.

The 16C-inspired calculator is aimed primarily at programmers. It provides integer arithmetic and operations useful when working with different number representations, while retaining the keyboard-driven workflow and RPN model of the original hardware.

The project is a clean-room implementation rather than an emulator of HP firmware. The interface and behaviour seek to remain faithful to the calculators while running as modern desktop applications.

This is free and open source software.

Key Features

• Includes separate HP-15C and HP-16C inspired calculators.
• Uses Reverse Polish Notation for entering calculations.
• Provides a simulated seven-segment LCD display.
• Offers scientific and engineering calculations with the 15C model.
• Supports complex numbers, matrices and statistical operations.
• Provides programmable calculator functionality.
• Offers programmer-oriented integer calculations with the 16C model.
• Faithfully recreates much of the workflow of the original calculators.
• Clean-room implementation with no dependency on original calculator firmware.

Website: github.com/zathras/jrpn
Support:
Developer: William Foote
License: GNU General Public License v3.0

jrpn is written in Dart. Learn Dart with our recommended free books and free tutorials.

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