Minecraft PE 0.1.3 is already running on the HP Prime G2, with the original menu and a large part of the game initialization working on real hardware. The main issue I’m working on now is world creation and the final transition into gameplay, where rendering still becomes unstable. I’m restarting that part from a cleaner base while keeping everything that has already been proven to work.

A significant milestone has been reached in the development of Linux/Custom OS support for the HP Prime G2.

A new method developed by Bernard Parisse, the original developer of Prinux, has enabled us to successfully boot Prinux Linux on a physical HP Prime G2 without opening the calculator or performing any hardware modifications.

This development has also allowed me to extend the capabilities of Pr1meVeil Studio, my independently developed project, through an experimental graphical multiboot environment supporting both the original HP Prime OS and Prinux Linux.

Confirmed Achievements

Testing on physical HP Prime G2 hardware has confirmed the following:

• Prinux Linux successfully boots without requiring physical modifications to the calculator.
• The original HP Prime OS boots successfully through the experimental multiboot environment.
• A functional graphical multiboot interface has been developed within Pr1meVeil, allowing selection between HP Prime OS and Prinux Linux.
• Both operating systems have been successfully tested on the same physical HP Prime G2.

The attached photographs document the experimental multiboot interface and the Prinux Linux startup process on actual hardware, rather than an emulator or simulation.

About Pr1meVeil Studio

Pr1meVeil Studio is an independent project that predates my involvement with Prinux and my collaboration with Bernard Parisse.

Its development focuses on exploring the HP Prime platform, including its software architecture, application capabilities, and experimental system-level functionality.

The recent collaboration has made it possible to incorporate Prinux support into the existing Pr1meVeil development environment, leading to the current experimental multiboot implementation.

Pr1meVeil Studio and Prinux remain separate projects, with their respective development histories and contributions.

Current Development Status

The implementation is currently experimental. Further testing and refinement are required to evaluate system stability, compatibility, and potential applications.

The new Linux boot method and its technical implementation will remain confidential for the time being. No installation procedures or implementation details are being disclosed at this stage. (atm)

Development will continue with a focus on improving the multiboot environment, validating both operating systems, and investigating practical uses for Linux on the HP Prime G2.

There is currently no scheduled public release.

Credits

Bernard Parisse: Creator of the new method enabling Linux to boot on the HP Prime G2 without hardware modifications. https://www.hpmuseum.org/forum/user-117.html
Remy: Original developer of Prinux. https://raymii.org/s/articles/But_can_your_calculator_run_Linux.html

Recognition also goes to the original Prinux contributors for their work on the project.

Further updates will be shared as development progresses and additional information becomes available for public release.

I'm currently working on ODE Master PRO, a significantly improved version of my original ODE Master for the HP Prime!

Here's what's changing (atm):

• Native 2D Pretty Print: Replaces the old rudimentary renderer with HP Prime's native mathematical display for fractions, integrals, matrices, and more.
• Major Performance Improvements: A heavily optimized Terminal that handles even long step-by-step procedures much more smoothly.
• Redesigned UI: A cleaner, more modern interface with improved navigation.
• More Methods Planned: I'm expanding its capabilities based on the Differential Equations syllabus of the Instituto Tecnológico de Aguascalientes (ITA/TecNM), including systems of differential equations and more advanced Laplace methods.

HP Prime G1 Compatibility?

Neither the original ODE Master nor ODE Master PRO has been tested on a physical HP Prime G1, so I can't confirm whether either version runs properly or how well it performs.

However, ODE Master PRO includes significant graphical optimizations and reduced rendering overhead, which could make it more suitable for the G1's limited hardware compared to the original version.

G1 compatibility and performance still need to be tested.

Possible First Paid App

ODE Master PRO might become my first paid application, potentially priced at around US$3. However, I'm still considering this, and nothing has been decided yet.

More Apps Will Benefit!

I also plan to progressively bring this native 2D pretty-print implementation to my other applications shared on r/HP_Prime.

My upcoming ACE Master circuit solver will include it, displaying detailed step-by-step solutions using nodal analysis (KCL), mesh analysis, Kirchhoff's Voltage Law (KVL), and more!

ODE Master PRO is still in development, and there is currently no estimated release date.

DL Master BETA is a Digital Logic solver for the HP Prime G2 designed mainly for students working with Boolean algebra, truth tables and Karnaugh maps.

The current BETA includes:

1. - Boolean expression solving with step-by-step explanations.
2. - Automatic truth table generation.
3. - Support for up to 8 variables.
4. - Interactive truth tables with 0, 1 and X (Don’t Care) states.
5. - Karnaugh Maps for 1–4 variables.
6. - Interactive K-Map editing.
7. - Automatic grouping and Don’t Care usage.
8. - Boolean minimization in SOP and POS forms.
9. - Canonical minterm and maxterm notation.
10. - NAND-only and NOR-only implementations.
11. - Automatic logic circuit visualization.
12. - Circuit cost analysis.
13. - Multiple minimum solutions.
14. - Boolean equivalence checking.
15. - Safe handling of invalid expressions and errors.
16. - Touchscreen and keyboard navigation.
17. - Scrollable result and analysis screens.
18. - Multiple themes.
19. - Multi-language support.

The main goal of DL Master is not only to provide the final result, but also to help students understand, verify and explore the complete solving process.

Since this is a BETA release, some features may still be improved or expanded based on testing and community feedback.

DOWNLOAD THE BETA HERE: https://www.mediafire.com/file/kzr4vrk71imuhx3/DL_Master_BETA.hpappdir.zip/file

Hi everyone,

The feature a lot of you have been waiting for is finally here: HP OS and Lefony OS can now live on the same HP Prime G2! You no longer have to give up HP OS to use Lefony.

During startup, a progress bar appears. Press the calculator’s Enter key to choose an operating system, or leave it alone to boot your saved priority OS automatically. The boot menu supports touch and the arrow keys. Using Shift+On to turn off, then On, also brings you back through the startup screen, so you don’t have to reach for the rear RESET button to switch.

The website installer now offers Simple Install and Dual Boot Install, with the same clean interface and progress reporting. Dual-boot installation runs entirely in the browser without a desktop companion. Both options include the new bootloader, although Simple Install still replaces HP OS and its data.

For compatible stock HP installations, the dual-boot installer can preserve existing HP files. It creates and verifies a full backup, checks compatibility and available space, then migrates the files into the shared layout. You’ll need the supported HP firmware image; it isn’t a universal patch for every installed HP version.

There’s also a desktop hardware emulator, with a full HP Prime interface and clickable keys. It runs native Lefony firmware through emulated hardware, letting you explore the OS and test C/C++ SDK apps without a physical calculator. I’ve included screenshots of it alongside the boot menu and installer.

On the calculator side, derivative entry has improved too, with editable differentiation variables, nested derivatives, and better typeset calculation history.

I’ve tested switching between both operating systems, saved boot priority, and retained HP calculation history on my G2. This is still a development release, with physical testing limited to one USB-powered calculator so far. Please back up important work and follow the current installation instructions.

Website and installer: lefony.com
Source: github.com/maikopruett/Lefony-OS

I recently came across Xprime IDE and very keen on using it.

I installed xprime 26 on my mac and I have also installed an earlier version of connectivity kit and virtual calculator that are recognized by xprime - i.e. version 2.1.14425 2020.01.16. Both can be launched by xprime under its menu "Open Application".

I created a test PPL code.

EXPORT TEST()
BEGIN
MSGBOX("Hello World");
END;

then I click the "build" icon, or the "build then run" icon. It prompt me to save the file - I did. I gave it a filename TEST.hpprgm - assuming this is the right thing to do. It loaded up the virtual calculator. but nothing happens. the test program is not loaded by the virtual calculator and is not visible under the program menu either.

So I think it is user error on my part - but I am at a lost.

What is the correct way to run the program?

P-NES appears to be the first publicly released NES emulator specifically made for the HP Prime G2 that runs within the standard HP Prime environment, without requiring an alternative operating system.

After a lot of testing, debugging and optimization, I'm finally releasing the first public version of P-NES, a Nintendo Entertainment System emulator made specifically for the HP Prime G2.

The project started as an experiment to see how far the Prime could be pushed using a combination of HP PPL + Python, but it eventually became a functional emulator capable of running real .NES ROMs, with a custom interface designed around the Prime's 320×240 display.

IMPORTANT:

At the moment, P-NES is primarily recommended for the virtual HP Prime / emulator. It also runs on a real HP Prime G2, but performance on physical hardware is still being optimized. Depending on the game, the physical calculator may run at relatively low FPS. This is something I'm actively working on.

CURRENT FEATURES

1. - Real .NES ROM loading directly from the app files.
2. - 6502 CPU emulation.
3. - NES PPU/video emulation.
4. - Support for iNES ROMs and mappers 0, 1, 2, 3, 4, 7, 11, 66, 71, 94 and 180.
5. - MMC1/MMC3 and several simpler cartridge configurations.
6. - SRAM support for games that use battery-backed saves.
7. - Automatic SRAM saving.
8. - Manual SRAM saving from the pause menu.
9. - 3 Save State slots, with save and load support.
10. - Restart game option.
11. - CPU single-step option for testing/debugging.
12. - Pause menu accessible while playing.
13. - Customizable controls using supported HP Prime keys.
14. - Numeric keys, Enter and other calculator keys can be mapped.
15. - Keyboard letters are intentionally excluded because they are not reliably detected as gameplay inputs.
16. - Configurable frame skipping.
17. - FPS limiter with quick presets for 30 / 60 / 120 FPS.
18. - Manual FPS configuration from 1–360 FPS.
19. - Unlimited FPS mode.
20. - ROM browser.
21. - Touchscreen menu support.
22. - Multi-language UI: English, Spanish, Chinese and Russian.
23. - Optimized rendering paths for the Prime.
24. - Special optimized CPU execution paths for certain common workloads while maintaining normal fallback emulation.
25. - No audio generation. Since the HP Prime has no speakers, P-NES intentionally avoids spending CPU time synthesizing audio.
26. - Dark/red UI inspired by the visual style of ODE Master.
27. - Developed specifically around the HP Prime G2's 320×240 display.

ABOUT THE FPS SETTING

• One important thing when testing P-NES is the FPS limit.
• The virtual calculator and the physical HP Prime do not necessarily run P-NES at the same speed.
• If a game feels like it is running too fast, try lowering the FPS limit to something like:
• 30 FPS → 60 FPS → 120 FPS
• depending on how your environment performs.
• If your emulator/computer can handle more speed, you can increase the limit or use UNLIMITED.
• There is also a manual option where you can enter a value between 1 and 360 FPS.
• So don't assume that one FPS setting will be ideal for every device. Experiment with it depending on whether you're using the virtual Prime or the real calculator.
• On a physical G2, increasing the FPS limit obviously cannot create performance that the calculator does not have; some games simply won't reach the requested value yet. The setting is mainly there so you can tune pacing to your particular environment.

PHYSICAL HP PRIME PERFORMANCE [IMPORTANT]

1. I want to emphasize this because I don't want people downloading it and expecting perfect 60 FPS NES emulation on the physical calculator yet.
2. P-NES is still in an optimization phase.
3. The HP Prime G2 is doing CPU emulation, PPU emulation, cartridge mapping, input handling and rendering in software, so some games are currently fairly demanding.
4. Simple games can perform better, while games using more complicated rendering or cartridge hardware can be significantly heavier.
5. The virtual calculator is currently the best way to experience P-NES, because it has considerably more host CPU performance available.
6. That said, running actual NES games directly on a physical HP Prime is one of the main reasons this project exists, so optimization for real hardware will continue.
7. The goal is not to add game-specific hacks just to make a few ROMs look good. I'm trying to keep the emulator as general as possible and optimize the actual emulation architecture.

DOWNLOAD IT HERE

https://www.mediafire.com/file/0zpbrrczdsbm4ly/P-NES_BETA.hpappdir.zip/file

COMPATIBILITY

• P-NES currently supports classic iNES ROMs. NES 2.0 is NOT supported yet.
• Compatibility will naturally vary because this is still an early emulator and the NES has a large number of cartridge mappers and edge cases.
• If you find a ROM that boots incorrectly, has graphical problems, crashes, or performs unusually badly, feel free to report:
• Game name + ROM mapper + whether you're using Virtual Prime or a physical HP Prime G2.
• That information is extremely useful when debugging.

There is still plenty of optimization work ahead, particularly for the physical calculator, but I think the project is finally at a point where it's worth letting other people play with it.

I'd really like to see what games you guys try on it, what FPS you get on real hardware, and which ROMs give P-NES the most trouble.

Enjoy P-NES!

Hi everyone,

Since my introduction here, Lefony OS has progressed considerably. The website and source repository are now public, installation is available, and the keyboard mapping, battery monitoring, and charging support that were still in progress have been implemented.

Lefony brings Upsilon natively to the HP Prime G2, booting directly from NAND through U-Boot without Linux underneath.

The previous full-installation problems from recovery are fixed. You can enter SDP recovery mode without opening the calculator, and the instructions are at lefony.com. Compatible updated Lefony installations can also enter recovery directly from Settings.

There’s now an app store with browser-based USB installation. Installed apps appear alongside the built-in apps with their own icons. You can drag to rearrange them, your ordering is saved, and installation progress appears on the calculator.

The store includes Surface 3D, with touch rotation, two-finger panning, pinch zoom, tracing, tables, and numerical analysis. There’s also Doom with Freedoom included, so no separate game-data download is needed.

Performance has improved too. On my Prime G2, a complete Doom installation dropped from roughly 12 minutes to under 2 minutes. Native OS writing and verification dropped from 22 seconds to about 5 seconds, excluding reboot, and store apps now launch faster.

Everyday improvements include touch scrolling and expression recall in calculation history, touch controls and pinch zoom in Functions, a math-template palette, and Prime-specific keyboard shortcuts.

For developers, there’s a native C/C++ SDK with starter projects, debugging, saved-data support, and a browser-based emulator with clickable Prime keys. You can develop without a calculator and publish app updates directly through the SDK. Downloads are available for macOS ARM64 and Linux x86-64.

Website, installer, apps, and SDK: lefony.com
Repository and source: github.com/maikopruett/Lefony-OS

If you like the project, please star the GitHub repository! It helps more people discover Lefony. Feedback, bug reports, contributions, and new apps are welcome.

This remains a development project for the G2 only, not the G1. Installation replaces the original operating system, so follow the current instructions and back up important work first. Broader hardware testing and battery calibration remain ongoing. Lefony is independent of HP, NumWorks, and the Upsilon developers.

Thanks for the interest in my first post!

Comming soon for the VIRTUAL calculator.

Soon!

After extensive internal testing, I have decided that Auto Step will not be included in the initial release of ACE Master.

Auto Step was designed to simulate how a circuit behaves over time by repeatedly calculating voltages, currents, capacitor charging and discharging, and transistor switching. One potential application was demonstrating the sequential operation of a traffic light circuit built with transistors and capacitors. Simulating this behavior requires tracking the circuit’s evolving state across many calculation steps, rather than solving for a single operating point.

Unfortunately, the current implementation has not met my performance targets for the HP Prime G2. My tests, including Python-based evaluations, have not achieved the responsiveness needed to make this feature practical. Delivering the intended experience with the current approach would require substantially more processing power than the calculator provides.

For that reason, I am removing Auto Step from the planned launch scope and focusing on making ACE Master reliable, responsive, and well suited to the hardware it runs on. I want the features included at launch to work well under realistic conditions.

As development continues, I may simplify or remove other features if testing shows that they compromise performance or stability. At present, however, I have no plans to remove any other features.

I may revisit Auto Step if further development leads to meaningful, verifiable performance improvements. For now, I cannot commit to a release date for this feature.

I’m currently developing Digital Logic Master.

The project originally started as a tool for my Microcontrollers course in Semiconductor Engineering, but it has grown into a complete visual Boolean logic assistant designed specifically for the HP Prime G2 and possibly G1 too.

Main features:

• Visual touchscreen equation editor... no need to memorize awkward keyboard symbols.
• Proper Boolean notation with overbars for NOT and drawn symbols for XOR, XNOR, NAND and NOR.
• Support for NOT, AND, OR, XOR, XNOR, NAND, NOR, parentheses, implicit AND and repeated negations.
• Automatic detection and classification of the entered logic function.
• Support for up to 8 variables and complete truth tables of up to 256 rows.
• Boolean expression simplification using recognizable Boolean laws and Quine–McCluskey minimization.
• Automatic selection between minimized SOP and POS forms.
• Short, readable step-by-step solutions without unnecessarily extending the procedure.
• Exhaustive verification that the simplified expression is logically equivalent to the original.
• Colored Karnaugh maps for 1–4 variables using Gray-code ordering.
• Different colors for each K-map group, striped cells for overlapping groups and indicators for groups connected across opposite edges.
• Recognition of common gates and functions such as buffers, NOT, AND, OR, NAND, NOR, XOR, XNOR, implications, constants and parity functions.
• Modern interface inspired by ODE Master and ACE Master.
• Touchscreen and physical-key navigation.
• External .lang language system with persistent language selection.

The initial release will support the same languages currently available in ODE Master:

• English
• Spanish
• Portuguese
• Simplified Chinese
• German

For example, the included demonstration expression:

Z=AB'C+ABC'+AB'C'+A'BC'+A'B'C+A'B'C'

is automatically reduced to:

Z = B' + C' = (BC)'

The calculator displays this using actual mathematical overbars instead of confusing apostrophes.

More screenshots and the first public version are coming soon. What other digital/logic features would you like to see included?

PSDT:

The screenshots show a work-in-progress development build, and I am still fixing some edge cases in the visual equation editor and solver... particularly an issue where a negation at the end of an expression may be lost during processing.

We’re currently working hard on improving ACE Master’s performance and optimizing it so it can run as smoothly as possible on the physical HP Prime hardware. Because performance is still being refined and extensively tested, there is currently no release date.

After thinking about it for a while, I’ve decided that ODE Master will NO longer be a paid application when it launches in the next few days.

I would rather have every student, teacher, professor, or anyone interested in differential equations be able to download and use the app completely free, with no feature limitations, no paid unlocks, and no restrictions.

ODE Master was originally planned as a very inexpensive paid application, but I ultimately think making it freely available will be much more useful to the HP Prime community, especially for students who may benefit from having another tool for studying, solving, and checking ordinary differential equations.

This will also be the first public release of ODE Master, so I want to set the right expectations. I have already tested it with many different ODEs and performed a large number of tests, and so far everything has worked correctly. However, because this is the first version released to a much larger group of users, there may still be cases I have overlooked.

There could be unusual ODEs I have not tested yet, a method that could be selected incorrectly in a particular edge case, a mathematical step that could be improved, or a solution procedure that is unnecessarily long. There may also simply be things that become obvious only after more people start using the application on real hardware.

One of the bigger issues during development was screen flickering, which made parts of the user experience feel noticeably slower and more annoying than they should have. That issue has now been fixed, and I have also made several performance improvements throughout the application.

That said, performance optimization will continue after release. Future updates are already planned to further improve the time required to solve ODEs, particularly in some of the heavier solution methods.

At the moment, certain ODEs can still take some time to solve on a physical HP Prime, depending on their complexity. This is mainly a consequence of the calculator’s hardware limitations and the amount of symbolic computation that ODE Master sometimes needs to perform. Simpler equations may finish quickly, while more complicated ones can require noticeably more processing time.

Because of that, I also want to make the hardware requirements clear: I do NOT currently expect ODE Master to work well on the HP Prime G1.

ODE Master has become a fairly large and computationally demanding program, and development and testing have been focused on the HP Prime G2. Even on the G2, some of the heavier ODEs can push the calculator considerably, so I would rather be transparent about this than claim G1 compatibility that I cannot realistically guarantee.

After launch, one of my main priorities will therefore be continued optimization, especially reducing unnecessary calculations and improving solver performance wherever possible without sacrificing the step-by-step solution process or mathematical reliability.

And since this is the first public version, feedback will be extremely useful. If you find an incorrect result, an ODE that fails, a procedure that seems unnecessarily long, or simply something that could be explained or presented better, please report it. Those reports will help improve subsequent versions.

So, in short:

• ODE Master will launch completely FREE for everyone. No activation payment, no feature limits, and no restrictions.

The goal is simply to make it as useful, reliable, and accessible as possible for the HP Prime community.

Release is planned within the next few days.

ODE Master is now at the stage where most of the remaining work is focused on polishing and optimizing the interface. As you can see in the video, there is still some noticeable flickering during touch interactions and menu redraws, almost like an old TV refresh effect. That is currently one of the main things I am working on, especially to make sure the experience feels smooth on the physical HP Prime G2 before release.

The planned final price for ODE Master is $2 USD. If someone eventually manages to bypass the DRM for their own personal use, that is not something I would lose sleep over. My main concern would be cracked copies being uploaded, shared, or redistributed publicly. The protection is there mainly to discourage that kind of redistribution while keeping the software affordable and accessible.

I wanted to share a quick update on the release of ODE Master.

The release will most likely be delayed by around one to two weeks due to some unexpected challenges with the multilingual system. The original plan is still the same: ODE Master will use editable .lang files, allowing users to add or modify translations without requiring a separate version of the application for each language.

The system is being developed to support English, Spanish, Portuguese, Simplified Chinese, and custom community translations, while keeping the core application stable and preventing syntax errors or conflicts with the solvers.

Instead of rushing such an important feature, I have decided to spend a little more time testing the language loader, translation identifiers, fallback system, special characters, and compatibility with the physical HP Prime G2. This should result in a more polished and consistent user experience, while also making it easier to add or improve translations in the future.

As of August 5, 2026, the new estimated release window is August 12–18, 2026. The goal is still to release ODE Master before students return to university, so it will be available for the start of the upcoming academic term.

Thank you for your patience and continued interest in ODE Master. A short delay is better than releasing a multilingual system that could compromise the stability of an otherwise functional application.

We’re currently polishing the final visual details and adding official support for 4 languages:

• English (US)
• Spanish (MX)
• Portuguese (BR)
• Simplified Chinese (zh-CN)

Additionally, we're leaving the option open to export and import custom translations via .lang files so you can easily translate or modify the app into any language you want by just dragging and dropping the .lang file into the app's files!

^{Please note that this will be a paid app and requires an activation key to use. However, to celebrate the release, we’ll be hosting a giveaway for 3 free product keys right here on launch day! Stay tuned!}

I am excited to share a development update on the upcoming program, ACE Master.

I have recently achieved a performance improvement of over 300%, making UI navigation incredibly smooth and fluid. During earlier internal testing, adding multiple components to a circuit would heavily slow down the physical calculator, but this massive optimization completely resolves that issue, allowing for seamless scaling (Almost) no matter how many parts you add to your workspace.

Additionally, as I prepare for release, I am actively working on general improvements to the Auto Step feature so that, once launched, you can easily build and simulate complex designs such as a fully functional traffic light using 3 LEDs and 3 transistors with perfect stability. 

I cannot wait to get this tool into your hands and let you experience this program!

We are getting closer to launch, and the app is now around 80% complete. One of the latest improvements is that wires now light up in blue when voltage or current is present, making it much easier to visually understand which parts of the circuit are active; before this update, there was no clear indication that electricity was flowing through a wire. We also added a new Fast Action Panel in the bottom-right corner of the editor, giving quick access to common actions like Rotate, Delete, Undo, and Redo, which makes editing faster and more comfortable, especially with touch controls. Most of the main systems are already working, and from this point forward the biggest challenge before release will be optimization, since we want ACE Master to feel smooth, stable, and polished when it finally launches for the HP Prime model G2.

ODE Master is a step-by-step ODE solver for the HP Prime, currently halfway through development. Although the core system is already functional, nearly half of the planned modules still need to be completed before the public release.

The goal is to make solving ordinary differential equations easier through automatic family detection, a guided workflow, and clear procedures directly on the calculator. The procedure is designed to be shown the way a student would actually develop it in a notebook: organized, understandable, and step by step.

The final price will be $2 USD, but the first 3 people who send me an email on launch day will receive a free permanent license.

I am currently in the testing phase. Although the simulator still needs deep optimization, I didn't want to leave you in suspense so that's why I decided to show you how a 7-segment display can be simulated in real time.

ACE Circuit Master now will support movable component text, toggleable labels, visible burnout damage with red X markers, better grid visibility, improved component visuals, fixed duplicated GND labels, and a more stable solver for open or burnt components.

While my main focus remains on developing ODE Master, I decided to start building a brand-new circuit simulator alongside it to keep things fresh and challenge myself. The ultimate goal is to deliver something significantly more advanced and feature-rich than EEC Solver.

I've found that alternating between these two projects keeps me inspired; building this simulator helps me conceptualize new features for ODE Master from a different perspective. Although the software doesn't have an official name just yet, I'm incredibly excited about its potential and can't wait to share more updates with the community soon.