Scientific Pascal
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Scientific Pascal
@scipastips.bsky.social
100 followers 88 following 67 posts
Applications of the #Pascal #programming language in #science, #research, #medicine and #technology. Semi-automated & curated by J. W. Dietrich (@drjwdietrich.bsky.social)
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The Pascal Magazin is a new German magazine about #Pascal programming and #Lazarus, covering current news as well as tips and hacks for developers.

Das Pascal-Magazine ist eine deutsche Online-Zeitschrift zur Entwicklung mit Pascal und Lazarus mit Neuigkeiten, Tipps und Tricks.

pascalmagazin.de
Screenshot of the Pascal Magazin.
October 21, 2025 at 8:32 PM
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PASTA/80 is a Turbo Pascal 3.0-compatible compiler that generates native machine code for classic and modern #Z80 machines.

#Pascal #programming #pasta80

github.com/pleumann/pas...
PASTA/80. Mascot logo with pasta coming out of a package with the inscription "PASTA/80 – Z80 PACAL TO ASSEMBLY" Graphical demo app written in Pascal with PASTA/80. A game written in Pascal with PASTA/80
October 21, 2025 at 3:46 PM
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In 1979, Apple introduced Apple Pascal along with the Apple Pascal Operating System for the Apple II. It paved the way for later Apple OSes, including SOS, #Lisa_OS, and #Mac_OS (which were written in #Pascal as well). Choosing Pascal laid the foundation for the high stability of Apple's OSes.
Add for Apple's Pascal, ca. 1979. Text and image on paper, with the option to iron an image on a t-shirt. From the text: "Apple lets you get personal with Pascal. There's only one logical way to find out what a person wants in a personal computer. Ask the person who'll be using one. At Apple, we've been very successful at identifying just what people look for in com-puters. And then providing them with it. In spades. For serious enthusiasts, this means making available sophisticated innovations that are often conspicuously absent from other personal computers. Like Pascal. Apple II is one of the few personal computers that has it. And when you turn this page and feast vour eves on the many advantages this level, general-purpose language has to offer, you'll see why that's very good news indeed. When you've got it, flaunt it. If you'd like to let the world know who speaks Pascal, here's how: Follow the dotted line and cut out the transfer image above Preheat iron dry-woo setting) tor 3 minutes. Slip garment on ironing board over scrap material. Remove wrinkles. Position transfer face down and pin edges to ironing board cover. Iron transfer slowly too hot. vet transter coo for one minute. then undin and slowiv on transter straight un. Results are best wher oshirt is at least 50% polvester."
October 20, 2025 at 7:42 AM
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The International Pascal User Group is in the starting blocks. Goals include fundraising for new features in #Delphi, #Lazarus and #Free-Pascal and support for members. Membership discounts for the Blaise Pascal magazine, books, courses and conferences.

www.blaisepascalmagazine.eu/internationa...
Symbolic description of the International Pascal User Group (IPUG) with a picture of Blaise Pascal's head, a rainbow, and icons for Lazarus and Delphi. From the text: "We are introducing the International Pascal User Group membership: IPUG. Objective: support for the FOUNDATION SUPPORT PASCAL (FSP) (St. Ondersteuning Programmeertaal Pascal, Netherlands, affiliated with the Blaise Pascal Magazine which is part of this Dutch foundation)"
October 20, 2025 at 7:26 AM
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Apple's legendary #Pascal syntax poster from 1979. It was created by Jef Raskin to adapt the syntax of Bill Atkinson’s #Apple_Pascal compiler. The poster was over the desk of every programmer at #Apple and over the desks of many programmers outside of Apple.

vintagecomputer.ca/the-history-...
The Apple Pascal Poster. This poster depicts graphically the Syntax of the Pascal programming language. Coloured line graphic on a black background.
October 19, 2025 at 1:39 PM
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Pascal's comeback is continuing...

www.index.dev/blog/most-po...
Screenshot from index.dev: Delphi/Object Pascal is making a comeback. Moved from #12 to #9, showing a noticeable jump. This could indicate: A resurgence in legacy applications requiring maintenance. A niche but loyal developer base keeping it alive.
September 5, 2025 at 3:57 PM
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Announcing the 2025 Pascal Conference
in Sundern, Germany, 18-21 September

pascalconference.com
Banner image of the 2025 Pascal Conference with portraits of the invited keynote speakers.
August 30, 2025 at 6:36 PM
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Issue #126 of the Blaise Pascal Magazine: ZIP puzzle solver in #Pascal, Resizing images, shaped buttons and sprites with #Lazarus and #Object_Pascal, multiple articles on AI and infos to the upcoming Pascal Conference 2025.

www.blaisepascalmagazine.eu
Title page of the Blaise Pascal Magazine #126
August 30, 2025 at 6:26 PM
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The #Lazarus_IDE for #Free_Pascal has been released in version 4.2. This bugfix release has been built with FPC 3.2.2.

#Pascal #programming

www.lazarus-ide.org
Screenshot of the Lazarus IDE 4.2 on macOS Ventura 13.7
July 26, 2025 at 4:11 PM
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These four apps are part of the movement of endocrine cybernetics, an approach that revolutionises our understanding of hormonal systems and the management and diagnosis of associated diseases. And all four apps are written in #Object_Pascal.

#Pascal #programming
Parts of the source code of SPINA Carb, written in Object Pascal.
July 19, 2025 at 2:26 PM
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Issue #125 of Blaise Pascal Magazine is available. Topics include updates on project #Fresnel, reducing code with scoped objects in #Pascal, information on the new #Lazarus handbook, an outlook on the Pascal conference 2025 etc.

www.blaisepascalmagazine.eu
Title page of issue 125 of the Blaise Pascal Magazine
June 21, 2025 at 9:08 PM
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Issue 123/124 of Blaise Pascal Magazine released: #Geocoding with #Pascal, a die-cast simulator for teaching statistics in #Object_Pascal, QUEENS puzzle in Pascal, threading #Free_Pascal code via #WebAssembly in the browser, RTTI in #PAS2JS etc.

www.blaisepascalmagazine.eu
Title page of the issue 123/124 of the Blaise Pascal Magazine
May 12, 2025 at 5:50 AM
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The Lazarus IDE for Free Pascal has been launched in version 4.0. This major new release introduces multiple novel features, including new event types, extended support for Cocoa, optional docking, more debugger options and extended components.

#Lazarus_IDE #FreePascal

www.lazarus-ide.org
Screenshot of Lazarus 4.0 on macOS 13.7.5 Ventura.
May 8, 2025 at 11:47 PM
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MacPaint was a revolutionary app that demonstrated the capabilities of early #Macintosh computers. Jeffrey Starr reviews its source code in his blog. The code in #Pascal and assembly language, while still in old procedural style, is an example of good programming practice.

ztoz.blog/posts/macpai...
Screenshot of MacPaint 1.5 (1985) MacPaint screenshot with Japanese Lady (1984) Source code of the HVContrain procedure: PROCEDURE HVConstrain(VAR newPt: Point); VAR dh,dv: INTEGER; BEGIN IF shiftFlag THEN { constrain to horiz or vert } BEGIN IF hConstrain AND vConstrain THEN { still chosing direction } BEGIN dh := ABS(newPt.h-ptConstrain.h); dv := ABS(newPt.v-ptConstrain.v); IF (dh > dv) AND (dh > 1) THEN vConstrain := FALSE; IF (dv > dh) AND (dv > 1) THEN hConstrain := FALSE; END; IF hConstrain THEN newPt.v := ptConstrain.v; { horiz } IF vConstrain THEN newPt.h := ptConstrain.h; { vert } END; END;
April 6, 2025 at 9:10 PM
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The original paper describing MRIcro, the first version of #MRIcron, has been cited more than 2000 times, according to CrossRef.

pubmed.ncbi.nlm.nih.gov/11568431/

doi.org/10.1155/2000...
Screenshot of the web site of this article, showing more than 2000 citations.
January 25, 2025 at 11:03 PM
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MRIcron, a powerful visualisation tool for neuroimaging research, has been written in #Object_Pascal with the #Lazarus_IDE to support platform-sensitive development and to provide a processor-native high-performance software system.

pubmed.ncbi.nlm.nih.gov/39761848/

doi.org/10.1016/j.ne...
Screenshot of the MRIcron user interface on macOS. The main menu provides access to core functions. Users can change the crosshair position by clicking on the image or setting the coordinates in the top toolbar, allowing users to specify the crosshair coordinates (with X, Y, Z referring to the column, row and slice of the image). The title bar reports the crosshair location in world space as well as the voxel intensity. Likewise, users can set contrast and brightness by dragging over the image or using the minimum and maximum thresholds in the titlebar. A pull-down menu allows the user to select the color scheme (here Grayscale). Buttons in the toolbar allow the user to display a gradient colorbar and draw lesions. The bottom status bar reports recent changes (here the new contrast values). Demo image. MRIcron introduced improved drawing tools to map lesions on individual participants (inset on right, sub-09) and create lesion incidence maps. The multicolored incidence map overlay shows the fractional incidence (thresholded for blue at 1% and red at 10%) for 1449 individuals. Both images from the Stroke Outcome Optimization Project (SOOP)
January 25, 2025 at 10:05 PM
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The CAI NEURAL API is a #Pascal-based deep learning #neural_network API that is optimised for AVX, AVX2, and AVX512 instruction sets plus OpenCL-capable devices, including AMD, Intel, and NVIDIA. It is compatible with Embarcadero #Delphi and the #Lazarus IDE.

github.com/joaopaulosch...
Illustriation for CAI
January 11, 2025 at 12:14 PM
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Bill Atkinson, a key architect of Mac OS and the associated revolution in human-software interfacing, developed QuickDraw (the original Mac graphics technology), #MacPaint and #HyperCard.

The source of MacPaint (in #Pascal and assembly language) is available.

github.com/samoli/MacPa...
Bill Atkinson (black and white portrait from about 1985) Old Macintosh computer (probably Mac 128, Mac 512 or Mac Plus) with MacPaint Part of the source code for MacPaint in the Pascal programming language
January 11, 2025 at 10:27 AM
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For a completely different task, simulating biological feedback loops, #Object_Pascal generates the fastest code. It is not only faster than that of interpreted languages (S/R and Python) but even outperforms fast compiled languages (C++ and Swift).

#Pascal #programming

doi.org/10.14201/adc...
Figure: Benchmarking results of code generated in five different programming languages (S/R, Python, Swift, C++ and Object Pascal) for simulation of two different types of feedback control systems. Object Pascal generates the by far fastest code.
January 4, 2025 at 7:19 PM
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In scientific computing, speed is critical when choosing a programming language. Additionally, given limited resources for funding and the challenges of climate change, memory and energy efficiency are important as well. #Pascal is in the Pareto-optimal set of these goals.

doi.org/10.1016/j.sc...
Table: Pareto-optimal sets of programming languages. Concerning time & memory, energy & memory and energy & time & memory, Pascal is in the top group. For the QuickSort algorithm, Pascal is the fastest and most energy-efficient programming language. Pascal is the fastest and most energy-efficient programming language for finding primes with the Sieve of Eratosthenes algorithm.
January 4, 2025 at 7:08 PM
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#Lazarus IDE 3.6 released.
#Pascal programming | #Object_Pascal
forum.lazarus.freepascal.org/index.php?to...
Screenshot of the Lazarus IDE 3.6 on macOS 13.6.9
October 1, 2024 at 8:15 PM
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This is another version. It contains #Object_Pascal as #Delphi.

Source: www.reddit.com/r/Programmin...
Another periodic table of programming languages
May 11, 2024 at 9:05 AM
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This version has a higher resolution. Unfortunately, some languages, e.g. #Object_Pascal, are missing. craftofcoding.wordpress.com/2017/01/09/m...
Periodic table of programming languages
May 11, 2024 at 9:01 AM
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#Intracranial pressure is vital for decisions in #neurointensive care. Its dynamics are only partly understood. Computer simulations in #Object_Pascal with Emparcadero #Delphi provide new insights by clarifying the role of the interstitial fluid. doi.org/10.1016/j.ba...
The unilateral hydrodynamic model proposed by Czosnyka imulations of the infusion tests (between tstart and tstop) with the models (a); and the analysis with the ICM+® software, illustrating the pressure-volume relationships represented by the original (b) and new (c) models
March 2, 2024 at 1:47 PM
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#Lazarus IDE 3.2 released. #Lazarus_IDE forum.lazarus.freepascal.org/index.php/to...
Screenshot of Lazarus 3.2.0 on macOS Ventura 13.6.4
March 2, 2024 at 11:46 AM