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1 An Alternative HP-42S/Free42 Manual Version January 2010 Author: Jos Lauro Strapasson, Brazil With contributions by Russ Jones, Manhattan Beach, California Copyright (C) 2010 Jos Lauro Strapasson. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".2 For more information visit the Free Software Foundation at Contents 1 3 2 Basic 4 4 Turn Setting the display 5 Training RPN using 5 5 DISP 6 The FIX 6 The ALL 6 The SCI 6 The ENG 6 RDX. And RDX, 7 MODES 7 The 7 Getting used to some keys of the 8 3 10 The CATALOG 11 More on the CLEAR 11 The CUSTOM 12 4 12 5 Complex 13 Complex numbers in rectangular 13 Complex numbers in polar coordinates .. 14 6 14 Basic 14 More than one program in the 16 The X?3 0 and X?Y 17 Real program 18 7 Using the 19 8 Numeric 20 9 21 The sub-menu 22 The second line: ALL , LIN , REG and RG? 22 10 23 11 Other 26 12 26 13. free42 -Specific 27 Keyboard Interface (Windows, Linux and Mac Desktops and Laptops).. 27 Program Import and 28 28 14. Comprehensive Command 28 GNU Free Documentation 35 1 Introduction Since HP-42S was a very nice calculator, and its official Manual is no longer freely available and there were many people looking for its Manual , seemed good to me to write my own HP-42S Manual .4 I personally don't have a HP-42S (more than US$300 on ebay). I have a HP-33S and had a HP-48G, but my brother has one and I also use free42 simulator for PalmOS. This Manual will be of interest to people who: a) Have a HP-42S calculator and lost its Manual . b) Got the free42 simulator and want to know how to use it. c) Have a palmtop with PalmOS and want a nice scientific calculator (get free42 ) d) Just want to have an idea how 42S was. e) Have the official Manual but don't want to read more than 300 pages! Why HP-42S? Because it was a very, very nice calculator and also a powerful one.5 I know some other HP models from the past and the present like 48G, 49G, 28S, 33S, 20S, 6S Solar, 15C, and even a TI-36X Solar, etc, but 42S is my favorite. And because there is a free simulator ( free42 ) that works on Palm OS,

Windows and Linux and there are also some emulators (at the moment emulators are only useful for who has a real calculator since HP-42S roms are not freely available). This calculator played an unique position among HP calculators! Being a scientific programmable 100% RPN calculator, it also had some graphing abilities but was pocketed sized and non RPL (some people as me like RPN, but dislike RPL).6 It is important to say that this Manual is not complete and I don't want it to be. Two things I really don't want to see here are PRINTING and HP-41 compatibility. This because I suppose most owners don't have the printer (and it is not so useful) and also haven't had a HP-41 prior to HP-42S. If you want to download the fantastic Thomas Okken free42 program please go to this web site ~demun000/thomas_projects/ free42 / In my opinion free42 is even better than the real HP-42S. Try asin(acos(atan(tan(cos(sin(6 )))))). For more information about HP-42S please see Here you can find emulators for HP-42S (very nice) I would like to finish this introduction saying that it would be nice to have the HP-42S back to life again and even better to have a model (both real and in simulator/emulator form) based on HP-42S but with some of the 33S features like more memory, an equation editor, fractions, program lines starting with letters, physical constants, units conversion, less useless functions, etc.7 And it also would be nice to have HP-42S ROM images for free just like what happened to HP-48G and other models and keeping PDF versions of the manuals of retired models to download would be nice too. Perhaps someone will listen to me! A quick note on notation: throughout this Manual , for the most part, keys that are to be pressed are denoted by putting them in a box, ENTER, except when the keys are numbers or arithmetic operators. Keys that are 2nd functions denoted by orange lettering on the calculator are denoted in orange with an orange box preceding it, Functions that are accessed through the menus are generally denoted by shading in grey, such as in FCN.8 2 Basic Operations RPN The HP-42S, like most old HP calculators, is a RPN calculator. RPN comes from Reverse Polish Notation . In RPN we first enter data and then we enter the mathematical operations. Example: To make a simple operation like 2+2 in a normal algebraic calculator we do 2 + 2 = which give to us 4. To make this same calculation using a RPN calculator we do 2 ENTER 2 + As we can see in RPN mode we first enter the data pressing the ENTER key after

System requirementsAll MAGIX programs are developed with user-friendliness in mind so that all the basic features run smoothly and can be fully controlled, even on low-performance computers. The technical data for your computer can be found in the control panel of your operating system.Operating systems You need a 64-bit version for the following operating systems:Windows 11 | Windows 10Minimum system requirementsProcessor: 2 GHzRAM: 2 GBGraphics card: Onboard, minimum resolution 1280 x 768Sound card: OnboardAvailable drive space: At least 2 GB for program installationProgram languages: English, Deutsch, Español, Français, Italiano, NederlandsInternet connection: Required for registering and validating the program, as well as for some program features. Software requires one-time registration.File formatsAudio ImportExportAIFFFLACMIDI standard format (MID)MIDI standard formats (GM, GS, XG)MP3*OGG VorbisWAVWAV with codecVideo ImportExporting musicAVIMXVWMVOther ImportExporting musicAudio CDData CD/DVDNote: Only non-copy-protected Audio CDs can be imported.CHOOSE YOUR EDITIONMUSIC MAKER 2025PREMIUMNEW! Effects Racks with drag & dropNEW! 35 easy-to-use Custom Effects 20 Soundpools for free42 effects & 7 instruments includedNative Instruments & iZotope Plug-insMUSIC MAKER 2025PREMIUMNEW! Effects Racks with drag & dropNEW! 35 easy-to-use Custom Effects 20 Soundpools for free42 effects & 7 instruments includedNative Instruments & iZotope Plug-insSelect a purchase optionPerpetual license - New purchasePerpetual license - UpgradeMUSIC MAKER 2025ULTIMATE Vol. 2All PREMIUM features & contentsNEW! colorFX SuiteNEW! 5 Vita InstrumentsNEW! 14 GB Soundpool bundleNEW! 3 colorFX effectsMUSIC MAKER 2025ULTIMATE Vol. 2All PREMIUM features & contentsNEW! colorFX SuiteNEW! 5 Vita InstrumentsNEW! 14 GB Soundpool bundleNEW! 3 colorFX effectsSelect a purchase optionPerpetual license - New purchasePerpetual license - UpgradeMUSIC MAKER 2025UNLIMITEDAll PREMIUM features & contents1 year Loops Unlimited subscription350+ GB of premium quality samples650+ Soundpools in 40+ genres2 new Soundpools per monthMUSIC MAKER 2025UNLIMITEDAll PREMIUM features & contents1 year Loops Unlimited subscription350+ GB of premium quality samples650+ Soundpools in 40+ genres2 new Soundpools per monthSelect a purchase optionPerpetual license - New purchasePerpetual

March 12th, 2025 - Free - 100% Safe Free42 is a lightweight and free-to-use calculator that is styled after HP-42S calculators. It will help you perform even more advanced calculations, use multiple functions, and customize it with skins.Today, almost every computer or device already has an in-built calculator function, which can be handy for simple and quick calculations. However, you would need to use the functions and other features required for more advanced mathematics to make them more refined and accurate.You’ll be able to do that by using third-party tools like Free42. It is a free-to-use calculator based on HP-42S, an industry-standard calculator for a long time.It allows you to make advanced calculations on your computer and use various functions with an advanced calculator like this.Binary and Decimal Calculator IncludedWhen you open this one up, it looks very similar to the HP-42S calculators and their design. Even the skin included closely resembles the design of those early calculators that were so popular. Those were handheld calculators, and most of the basic and main functions are also here.This application makes it possible to take this calculator everywhere you might be and have it on your device.It is helpful for more advanced calculations. There are two main modes of operation, which are binary and decimal.Complex Functions UsedWith this tool, you can export and import expressions and functions, making it easy to use them again the next time you use the app. You can also copy-paste information and data into the calculator.Of course, it’s also worth mentioning that you’ll have many advanced functions with this tool.There is basic and advanced calculus, including sin, cos, tan, matrix, conversions, and many other advanced concepts.ConclusionFree42 is a free-to-use calculator that is based on HP-42S calculators. It offers many advanced functions that you won’t find on basic calculators.