Features

Features of the real HP-15C

The HP-15C was a high end scientific programmable calculator and the top model of the Voyager series. Some of the main features are:

RPN logic with 4 stack levels plus a last X (LSTx) register
67 addressable registers, used for storage registers or program steps.
19 storage registers in default configuration with 46 registers for programs (appx. 332 program steps)
Programmable with up to 448 program steps. In this configuration only 3 storage registers are available: R0, R1 and RI
10 Flags and 12 conditional tests, such as x = 0, x ≠ 0 and x > y
Indexed looping via storage gegister I
Full storage arithmetic: STO +, −, × and ÷
5 softkeys, labeled A through E
Multiple number format: FIXed, SCIentific and ENGineering
Trigonometric functions SIN, COS and TAN
Hyperbolic trigonometric functions SINH, COSH TANH
Three trigonometric modes: DEGrees, RADians and GRADs
Reverse trigonometric functions for standard and hyperbolic functions
Mean and standard deviation of 2 variables
Summation of n, x, x², y, y² and xy for statistic calculations of 2 variables
Decimal hours and hrs.min.sec. conversions
Polar and rectangular conversions
Solve and root finder
Numeric integration
Linear regression
Complex numbers
Matrix operations
Continuous memory

A more detailed feature list is available from the HP Calculator Museum.

Additional features provided by the simulator to integrate with and benefit from the operating system.

Data exchange with SwissMicros DM15 models
Native support for Windows (7 and following, 64bit), macOS (up to Monterey, x86; Apple M1 via emulator) and Linux (x86, 64bit)
The source code version should run on all unixoid operating systems supported by Tcl/Tk 8.6.6 and higher
Pop-up menus for stack, storage registers, programs, flags, conditional tests and matrices
Save and load programs to and from disk
Programs can be documented, the documentation is stored with the program file
HTML export of programs and program documentation
Integration with the operating system's clipboard
Code and mnenomic display of program steps (in popup menu)
Full mouse and keyboard support
Multi language support for popup menus and dialogues