I wrote my first HP 41 emulator for DOS operating system at years 1994-1995.
The emulator was published on Internet at 1995 .
I created "The hp41 emulator page" on www.geocities.com at year 1995.
Since 2009, geocities.com is off line, so , I translated the html pages here.
At year 2004 I began to write an HP41 emulator for Windows, updating the old DOS code.
Later I decided to write more emulators for the HP family of calculators,
beginning with the HP67.
I began to write the MyRPL programming language at year 2016.
You will find all these programs here.
Comments and questions welcome . Please, excuse errors in English usage.
You may help to the evolution of these emulators and MyRPL. If you find an error on
them, e-mail me. Thanks.
Alvaro Gerardo Suárez
Former member of the directive staff at Mensa Society
All the software present in these pages could be tested with Oracle Virtualbox and
a free image of windows 7 32 bit for virtualbox provided by Microsoft at http://www.modern.ie
You need a computer with windows 10 and at least 4 Gigas of RAM.
1) Download and Install VirtualBox.
2) Download the windows 7 image.
Go to: https://developer.microsoft.com/en-us/microsoft-edge/tools/
Select: Virtual machines. Choose the machine and download it.
Unzip the file and rename the .ova file to .ovf file
For example, if you downloaded IE8.Win7.VirtualBox.zip, unzip and rename: IE8 - Win7.ova to IE8-Win7.ovf
3) Import the image to virtualbox.
Go to the virtual box menu and select: import appliance
4) Enter to the windows 7 image (also known as virtual machine), start it and navigate to this site
For example: navigate using IE8 provided in the virtual machine.
5) Download and install the runtime to the virtual machine, from this site
6) Download and Install the calculators or MyRPL on the win7 image.
SIM41 for DOS Download a free copy
(202.835 bytes) Version 3.8 build 2 updated 2000/11/10
Dosbox 0.74 Site allows to run sim41 for DOS in Windows 8 (sim41 for DOS is a 16 bit application)
Keyboard map and allowed commands - (2332 bytes .zip file) updated 1998/02/10
Commands that can be executed with XEQ
Commands accepted in programming
Some basic programs -(2899 bytes .zip file) updated 1997/12/02
Algebraic behavior in SIM41
Test your ear
The eight queens problem
Moon landing simulator tested OK in SIM41
The game of NIM adapted from original code for the HP25 calculator.
Printing all allocated memory registers using the PRX command.
External file edition using xBase Languages
Batch procedures to save and recall memory, flags, stack and assigned keys in SIM41
Other HP41 and Emulator links
General information about HP calculators and more HP Emulators
Play with RPN logic using Java Script
Simple RPN calculator with standard buttons
RPN calculator in Java Script with memory management
Scientific RPN calculator with three memory registers
Scientific RPN calculator a variation of previous calculator
My personal interests
Currently I am updating often all these emulators. At september of 2010, I began to write an emulator for the Texas Instruments TI59.
SIM41W version 0.01 running in Windows 2000 Server. (800 by 600 pixels) View a Screenshot
SIM41W version 0.06, skin 3, running in a Laptop with a Wide Screen (1280 by 800 pixels) and XP Home View a Screenshot
Metaprogramming with sim41w A program could modify itself (2014/08/15)
(My RPL) means My Reverse Polish LISP
New menu options and Panels (2018/12/29) in version 1.1.7b language
View a screenshot
Panels and a grid for editing panel6 (2019/01/06) in version 1.1.8 View a screenshot
Sim25 for win10. (2019/04/08)An old calculator on windows 10 now
Sim41w for win10. (2019/03/21)To install read whatisnew.txt
New menu options. Some fixes.(2019/03/16)Download MyRPL 1.19c
Extended storage program example***2019/03/06***
Nigthly binary 2019/02/28. Experimental: Load Stack, Load Memory. Fixed a problem in Msize.
Version 1.18b: Testing new panels intented for assignable buttons.
View a screenshot using a High contrast Theme on Win10. (1600x900)
Version 1.1.8 Shortcut: If an assigned button is pressed while data is written to display,
the data will be put on first level of stack before to execute the assignment
This is valid for all panels buttons (128) and for the 18 assignable buttons located on
Version 1.17b. New "panels" technology.
Read the file "panels.txt" provided with the calculator (version 1.17b!). Also, new menu options
linked to "Change" on the external windows: a)Main memory. b)Variables
VERSION 1.17a FIX. THE ASSIGNED KEY "--" DO NOTHING AND SHOWS AN ERROR.
Fix: Open the variables window. Search for a variable name "-a". Change to "--"
Version 1.16e. New: Multiple assignments to several keys. Fast method to assign keys.
Use View in the Buttons sheet. Assign several variables to some keys at the grid shown.
Save pressing CTRL and W at same time on the PC keyboard.
Version 1.16d. Shrink and Expand the calculator. Show/No Show assignments.
Version 1.16c: rcl+ rcl- rcl* rcl/ and date could be written directly into the data
entry box. Use either the keys Enter or Eval at the end of each command.
Version 1.16b: New menu options. New window to show variables. Some fixes.
View a screenshot using a High contrast Theme on Win10.
From version 1.16: Redesign of Alpha sheet. Included some tooltips. New method to load on windows10.
(and load on windows 8 64 bits)
Read the file: install_on_win10_method2.txt (included in the distribution)
The compatibility with vrunfox6 is only from version 1.16. I changed internal code to do this.
Version 1.15d: The commands SECONDS and TIME could be written manually on the entry box.
Use ENTER to execute them.
SECONDS puts on the first level of the stack the seconds from midnight. TIME puts the current time.
The commands are programmable.
From version 1.15c: A command could be written manually in the data entry box.
Use either the Enter key or Eval key to execute the command.
The PC enter key also could be used.
From version 1.15a: If an object in the stack is greater than 254 characters, the
object is saved to a memo field. To show the big object use right mouse click
over the stack level where the object is saved.
From version 1.15a: Included memo fields in Main Memory and Variables Memory.
A memo field could be used to save objects with hundreds of Kilobytes.
MyRPL Notes about the MyRPL Version 1.0 Language (2017/10/28)
More notes: Comparing MyRPL and RPL (2017/11/02)
My TinyCalc components Calculator objects
My rpl sets***UPDATED***
My rpl add operator
My rpl free format***2018/08/14***
My rpl What is ... ?***2018/08/27***
My rpl variable levels***2018/09/09***
Reverse the stack in MyRPL program example***2018/09/16***
MyRPL is open source distributed under GNU Public License version 3 View sources available since 2017/12/12
HP41 Emulator for Windows Extended Version 1.1 Updated (2017/10/18)
Tones for sim41 Provided by Martin Andres Verens (2013/05/16)
SIM67 for Windows version 0.41HP67 Emulator Updated (2014/02/03)
Anasec67 sent by Paul KopffProgram for HP67 Updated (2013/07/16)
SIM65 HP65 Emulator for Windows, version 0.20c updated (2013/08/09)
SIM25 HP25 Emulator for Windows, version 0.19b (2013/07/16)
SIM59 TI59 Emulator for Windows, version 0.17 (2015/01/27)
Skin manager for sim59 developed by Pierre Houbert_available at his site ti58c.ift.cx , Emulator, Other products.
SIM502 Casio FX-502P Emulator for Windows, version 0.26 (2012/11/01)
HP 25, HP 41, HP 65 and HP67 Emulators at my Desktop, view a screenshot
Easy41 HP 41 Compiler, version 1.0 Alpha (2005/06/07)
FOCALFREE utility for HP41 free grammar translation. Version 1.2
Translating programs to FOCALfrom your favorite language
Free FOCAL to V41 translation
Turing machine simulator version 0.3 alpha
Sphinx Big Calculator version 0.15 alpha (2006/09/17)
Factors for sim41 Factors are numbers you can multiply together to get another number (2014/06/25)
FAQS Frequently Asked Questions. UPDATED (2018/05/04)