42S Calculator

Description

42S is a Windows Phone port of Thomas Okken's excellent Free42, a complete re-implementation of the highly praised HP-42S RPN scientific calculator. Thomas' original code was written from scratch, without using any HP code or using any ROM images, yet it is fully HP-42S compatible. This calculator provides all the functionality of the original HP-42S including several hundred built-in functions, extensive programmability, and printer output emulation.

Features: - RPN operation - Complex numbers - Real and complex matrix operations - Solver & numerical integration - Statistics - Base conversions and arithmetic - Programmable function keys - Extensive programmability for custom functionality. Existing HP-42S code packages can be leveraged for Engineering, Scientific, Financial, Statistical, etc functionality. Backward compatible with HP-41CX programs. - Internally stores values and performs operations in 25 digit decimal precision - Includes time & date functions based on the HP-41CV time module

A trial mode is offered with the following restrictions: - Programs, registers and calculator state are not saved - One digit after the decimal point is displayed correctly with remaining digits struck out - Trial notice will pop up every two minutes

Version 1.18 - Fixed bug where inserting END from catalog or XEQ "END" into a program caused app to crash. - Adjusted incorrect key sizing on 9 and divide keys

Version 1.17 - Implemented program import and export functions using SkyDrive

Version 1.16 - Increased key hit areas to include entire area surrounding key faces to prevent possible missed key presses. - Allow for large-size tile.

Version 1.15 - Windows Phone 8 release - Fixed Lumia 920 and WP8 compatibility issues due to WP8 display event ordering - Adapted screens for multiple resolutions available in WP8 - Removed splash screen since WP8 has much faster startup times - Added WP8 app list icon transparency (gets theme color)