All public updates from Project Ceylon: Development Journal, stories and research notes.https://ceylonprojectng.com/en-ushttps://ceylonprojectng.com/journal/project-ceylon-development-log-october-4-2026-slow-boring-and-exactly-what-we-need/https://ceylonprojectng.com/journal/project-ceylon-development-log-october-4-2026-slow-boring-and-exactly-what-we-need/Project Ceylon is under a hard hold on new development: no new features until the current qualification and repair pass proves the platform is a trustworthy baseline to build on.Sun, 04 Oct 2026 12:00:00 GMTJournalProject CeylonRetrocomputingOperating SystemsTestingDiagnosticsRefactoringNuDOSNuBASICSDKRusthttps://ceylonprojectng.com/journal/project-ceylon-development-log-october-3-2026-the-computer-has-to-prove-itself/https://ceylonprojectng.com/journal/project-ceylon-development-log-october-3-2026-the-computer-has-to-prove-itself/A couple of days ago I wrote that a green test is not the same thing as a working computer. Today we spent more time making that statement inconveniently literal.Sat, 03 Oct 2026 12:00:00 GMTJournalProject CeylonRetrocomputingOperating SystemsDiagnosticsNuDOSTestingArchitectureReliabilityhttps://ceylonprojectng.com/journal/project-ceylon-development-log-october-2-2026-tested-good-except-for-the-part-where-it-wasnt/https://ceylonprojectng.com/journal/project-ceylon-development-log-october-2-2026-tested-good-except-for-the-part-where-it-wasnt/I've spent an extraordinary amount of time lately testing things that have already been tested.Fri, 02 Oct 2026 12:00:00 GMTJournalProject CeylonRetrocomputingOperating SystemsNuDOSTestingStorageSystem Integrationhttps://ceylonprojectng.com/journal/project-ceylon-development-log-october-1-2026-the-mouse-moved-asteroids-is-real-and-the-hardware-stopped-sitting-still/https://ceylonprojectng.com/journal/project-ceylon-development-log-october-1-2026-the-mouse-moved-asteroids-is-real-and-the-hardware-stopped-sitting-still/Today was one of those days where several things that had been "almost there" finally became a lot more concrete.Thu, 01 Oct 2026 12:00:00 GMTJournalProject CeylonRetrocomputingOperating SystemsNuGUIInputAsteroidsClarisePlug-and-PlayQEMUhttps://ceylonprojectng.com/journal/project-ceylon-development-log-september-29-2026-the-website-is-real-so-is-the-next-display-bug/https://ceylonprojectng.com/journal/project-ceylon-development-log-september-29-2026-the-website-is-real-so-is-the-next-display-bug/Yesterday I wrote that Project Ceylon finally had a front door.Tue, 29 Sep 2026 12:00:00 GMTJournalProject CeylonRetrocomputingOperating SystemsNu-IrisDisplay ArchitectureWebsiteBuild in PublicQEMUhttps://ceylonprojectng.com/stories/the-development-journal-has-a-new-home/https://ceylonprojectng.com/stories/the-development-journal-has-a-new-home/The full Development Journal — every public entry from the first — now lives at ceylonprojectng.com, with an RSS feed.Tue, 29 Sep 2026 12:00:00 GMTStoryhttps://ceylonprojectng.com/journal/project-ceylon-development-log-september-28-2026-ceylon-got-a-website-then-we-started-talking-about-robots/https://ceylonprojectng.com/journal/project-ceylon-development-log-september-28-2026-ceylon-got-a-website-then-we-started-talking-about-robots/Today Project Ceylon got a real home on the web.Mon, 28 Sep 2026 12:00:00 GMTJournalProject CeylonRetrocomputingOperating SystemsLocal-FirstFederationReal-TimeRoboticsNu-Irishttps://ceylonprojectng.com/journal/project-ceylon-development-log-september-27-2026-apparently-housekeeping-is-systems-engineering-too/https://ceylonprojectng.com/journal/project-ceylon-development-log-september-27-2026-apparently-housekeeping-is-systems-engineering-too/Today I deleted almost 300 GiB of Project Ceylon development debris.Sun, 27 Sep 2026 12:00:00 GMTJournalProject CeylonRetrocomputingOperating SystemsNuGUIWorkpadLocal-FirstDevelopment Processhttps://ceylonprojectng.com/journal/project-ceylon-development-log-september-26-2026-remember-that-day-off-i-was-going-to-take/https://ceylonprojectng.com/journal/project-ceylon-development-log-september-26-2026-remember-that-day-off-i-was-going-to-take/Remember yesterday when I said I was probably going to take a day or two off?Sat, 26 Sep 2026 12:00:00 GMTJournalProject CeylonRetrocomputingOperating SystemsNu-IrisNuGUIDisplay ArchitectureDebuggingHardwarehttps://ceylonprojectng.com/journal/project-ceylon-development-log-september-25-2026-okay-so-what-exactly-is-a1-alpha/https://ceylonprojectng.com/journal/project-ceylon-development-log-september-25-2026-okay-so-what-exactly-is-a1-alpha/One of the problems with building an operating system in public is that eventually somebody asks a perfectly reasonable question:Fri, 25 Sep 2026 12:00:00 GMTJournalProject CeylonRetrocomputingOperating SystemsA1 AlphaNuBASICJuggernautAudioApplicationshttps://ceylonprojectng.com/journal/project-ceylon-development-log-september-24-2026-55-out-of-55-passed-then-we-found-the-test-was-wrong/https://ceylonprojectng.com/journal/project-ceylon-development-log-september-24-2026-55-out-of-55-passed-then-we-found-the-test-was-wrong/Yesterday I wrote that "worked once" is no longer one of our engineering states.Thu, 24 Sep 2026 12:00:00 GMTJournalProject CeylonRetrocomputingOperating SystemsNuGUIDebuggingTestingQEMUhttps://ceylonprojectng.com/journal/project-ceylon-development-log-september-23-2026-so-how-much-of-this-thing-actually-exists/https://ceylonprojectng.com/journal/project-ceylon-development-log-september-23-2026-so-how-much-of-this-thing-actually-exists/A little over two weeks ago, I started this journal with a fairly ridiculous question:Wed, 23 Sep 2026 12:00:00 GMTJournalProject CeylonRetrocomputingOperating SystemsA1 AlphaNuGUINuBASICQEMUhttps://ceylonprojectng.com/journal/project-ceylon-dev-log-september-22-2026/https://ceylonprojectng.com/journal/project-ceylon-dev-log-september-22-2026/September 22 was one of those days where a lot of the visible work happened below the surface.Tue, 22 Sep 2026 12:00:00 GMTJournalhttps://ceylonprojectng.com/journal/project-ceylon-development-log-september-21-2026-turning-a-working-system-into-a-trustworthy-one/https://ceylonprojectng.com/journal/project-ceylon-development-log-september-21-2026-turning-a-working-system-into-a-trustworthy-one/Today was one of those days where Project Ceylon kept answering one question with another.Mon, 21 Sep 2026 12:00:00 GMTJournalProject CeylonOperating SystemsNuGUIKirkSystems EngineeringQEMUDevelopment Loghttps://ceylonprojectng.com/journal/ceylon-development-log-september-20-2026-back-to-solid-ground/https://ceylonprojectng.com/journal/ceylon-development-log-september-20-2026-back-to-solid-ground/The last several days of Project Ceylon development have been dominated by one job: getting the system back to a known, reproducible state after moving the underlying MicroKernel platform forward.Sun, 20 Sep 2026 12:00:00 GMTJournalhttps://ceylonprojectng.com/journal/ceylon-development-log-september-19-2026-the-controller-was-ready-it-still-wouldnt-run/https://ceylonprojectng.com/journal/ceylon-development-log-september-19-2026-the-controller-was-ready-it-still-wouldnt-run/Today I submitted Project Ceylon to the Hackaday Retrocomputing Contest.Sat, 19 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopMicroKernelSchedulingDebuggingHackadayA1 Alphahttps://ceylonprojectng.com/journal/ceylon-development-log-september-18-2026-why-an-operating-system-needs-a-game/https://ceylonprojectng.com/journal/ceylon-development-log-september-18-2026-why-an-operating-system-needs-a-game/Today Ceylon's first native game stopped being a side idea and became something much more useful: a plan for a real application that can entertain people, stress the operating system, test recovery, and teach us how third-party software should be built on the platform.Fri, 18 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopGamesDeveloper PlatformResearchA1 Alphahttps://ceylonprojectng.com/journal/ceylon-development-log-september-17-2026-when-a-crash-needs-to-leave-evidence/https://ceylonprojectng.com/journal/ceylon-development-log-september-17-2026-when-a-crash-needs-to-leave-evidence/A real fault exposed an important distinction today: Ceylon can detect and contain a crashed component, but that is not enough. If the machine is going to recover from failures, it also needs to remember exactly what happened.Thu, 17 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopLoggingFault RecoverySystems EngineeringResearchhttps://ceylonprojectng.com/journal/ceylon-development-log-september-16-2026-static-foundations-dynamic-systems/https://ceylonprojectng.com/journal/ceylon-development-log-september-16-2026-static-foundations-dynamic-systems/Ceylon is learning how to become dynamic without abandoning a static, bounded and predictable foundation: leased execution workers, mirrored VSpace cohorts, bounded page capabilities, and a capability-pool question still open.Wed, 16 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopMicrokernelVirtual MemorySystems Engineeringhttps://ceylonprojectng.com/journal/ceylon-development-log-september-15-2026-locking-the-baseline/https://ceylonprojectng.com/journal/ceylon-development-log-september-15-2026-locking-the-baseline/A day spent proving the new low-level foundation: DMA and interrupt isolation, multicore FPU safety, runtime boundaries, and an integrated harness that learned to trust shared state instead of notification counts.Wed, 16 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopMicrokernelValidationSystems Engineeringhttps://ceylonprojectng.com/journal/ceylon-development-log-september-14-2026/https://ceylonprojectng.com/journal/ceylon-development-log-september-14-2026/A long day of audit closure and microkernel migration work froze a reproducible Ceylon baseline and advanced the new foundation to the B0 validation gate.Tue, 15 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopMicrokernelSystems EngineeringRoadmaphttps://ceylonprojectng.com/journal/ceylon-development-log-september-12-2026/https://ceylonprojectng.com/journal/ceylon-development-log-september-12-2026/September 12 was a day of architecture review, development governance, and a closer look at what modern Amiga users actually want from a workstation.Sun, 13 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopGovernanceArchitectureShared MemoryCommunity Researchhttps://ceylonprojectng.com/journal/a-night-off-a-looney-tunes-movie-and-a-hard-look-at-ceylon/https://ceylonprojectng.com/journal/a-night-off-a-looney-tunes-movie-and-a-hard-look-at-ceylon/A night away from Ceylon turned into dinner, a movie, a serious software audit, and a complete rewrite of the rules for building the operating system.Fri, 11 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopCode AuditGovernanceStatus Updatehttps://ceylonprojectng.com/journal/ceylon-dev-log-when-restart-doesnt-mean-restart/https://ceylonprojectng.com/journal/ceylon-dev-log-when-restart-doesnt-mean-restart/Tonight Ceylon closed the authentication publication race and uncovered the deeper distinction between execution restart and full service reincarnation.Wed, 09 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshophttps://ceylonprojectng.com/journal/from-first-light-to-first-key-ceylons-keyboard-path-comes-alive/https://ceylonprojectng.com/journal/from-first-light-to-first-key-ceylons-keyboard-path-comes-alive/Ceylon reached first light this morning. Tonight it went further: a real USB keyboard, discovered, configured, and decoded into semantic key events flowing through Ceylon's bounded input architecture.Tue, 08 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopUSBxHCIInput Architecturehttps://ceylonprojectng.com/journal/project-ceylon-keeping-the-architecture-rebuilding-the-assumptions/https://ceylonprojectng.com/journal/project-ceylon-keeping-the-architecture-rebuilding-the-assumptions/Project Ceylon keeps the architectural ideas that made the Amiga compelling while rebuilding the assumptions underneath them for modern hardware.Mon, 07 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopArchitectureIrisBatonLoomMicrokernelMulticorePerformanceQEMUVideo ToasterAmigahttps://ceylonprojectng.com/journal/the-backstory-is-live-tomorrow-yall-get-the-mess-as-it-happens/https://ceylonprojectng.com/journal/the-backstory-is-live-tomorrow-yall-get-the-mess-as-it-happens/The retrospective is caught up. From here forward, Project Ceylon becomes a real-time record of the work, wrong turns, breakthroughs, and whatever happens next.Mon, 07 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopStatus UpdateRoadmapAlternate HistoryAmigaIntel Arc A770NewTekProject Nu-DayVideo ToasterMicrokernelQEMUPostmortemhttps://ceylonprojectng.com/journal/where-project-ceylon-stands-today-september-6-2026/https://ceylonprojectng.com/journal/where-project-ceylon-stands-today-september-6-2026/This closes out the retrospective backfill with an honest accounting: what's proven, what's partial, what's planned, and what flatly isn't built yet. Starting tomorrow, this becomes a real daily journal.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopStatus UpdateRoadmaphttps://ceylonprojectng.com/journal/52-53-and-other-numbers-that-ruin-your-evening/https://ceylonprojectng.com/journal/52-53-and-other-numbers-that-ruin-your-evening/With the scheduler starvation bug fixed, the next client finally ran — and immediately failed for a much dumber reason. Shared logic assumed channel 52. It was actually assigned channel 53.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopDebuggingConfigurationPostmortemhttps://ceylonprojectng.com/journal/the-rng-bug-that-wasnt-an-rng-bug/https://ceylonprojectng.com/journal/the-rng-bug-that-wasnt-an-rng-bug/Two SecureRandom client tests were failing. Every instinct said the bug was in the random-number code. It wasn't. It was a busy-spinning restart starving lower-priority services out of CPU time entirely.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopDebuggingSchedulerPostmortemhttps://ceylonprojectng.com/journal/random-numbers-turn-out-to-be-a-whole-damn-subsystem/https://ceylonprojectng.com/journal/random-numbers-turn-out-to-be-a-whole-damn-subsystem/I expected to spend an afternoon on random numbers. I spent a lot longer than an afternoon on random numbers, because it turns out trustworthy entropy is genuinely its own subsystem, not a library call.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopSecureRandomEntropySecurity Architecturehttps://ceylonprojectng.com/journal/one-management-api-whether-you-click-it-or-type-it/https://ceylonprojectng.com/journal/one-management-api-whether-you-click-it-or-type-it/Whether you're driving Ceylon through a GUI or a terminal, it should be the same semantic backend underneath, not two tools that happen to overlap most of the time.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopManagement APINuGUICLIhttps://ceylonprojectng.com/journal/applications-without-pretending-were-unix/https://ceylonprojectng.com/journal/applications-without-pretending-were-unix/An application on Ceylon isn't automatically a Unix process wearing a different hat. Building the runtime meant deciding, on purpose, what to borrow from that model and what to leave behind.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopApplication RuntimeProcess Isolationhttps://ceylonprojectng.com/journal/ceylon-horos-the-lion-at-the-boundary/https://ceylonprojectng.com/journal/ceylon-horos-the-lion-at-the-boundary/Horos is Ceylon's security umbrella — the conceptual boundary between identity, credentials, authentication, sessions, and authority. The name comes from an old Greek word for a limit or boundary marker.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopHorosSecurity ArchitectureIdentityhttps://ceylonprojectng.com/journal/from-nu-day-to-ceylon-stop-building-the-workstation-and-build-the-computer/https://ceylonprojectng.com/journal/from-nu-day-to-ceylon-stop-building-the-workstation-and-build-the-computer/The pivot: one shared platform, validated across multiple profiles — workstation, server, security appliance, media workstation, development — instead of one narrowly-scoped media application pretending to be small.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopPlatform ArchitectureProfileshttps://ceylonprojectng.com/journal/why-project-nu-day-failed/https://ceylonprojectng.com/journal/why-project-nu-day-failed/"Failed" doesn't mean nothing worked. It means the project's boundaries stopped making sense. Building a real media workstation meant building an entire operating platform underneath it, whether I'd scoped for that or not.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopProject Nu-DayScopePostmortemhttps://ceylonprojectng.com/journal/project-nu-day-what-actually-worked/https://ceylonprojectng.com/journal/project-nu-day-what-actually-worked/Before I get into why Nu-Day didn't survive, it deserves an honest accounting of what it actually proved. A working path is not the same thing as a finished subsystem, but it's not nothing either.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopProject Nu-DayQEMUStatus Updatehttps://ceylonprojectng.com/journal/what-it-actually-takes-to-drive-an-intel-arc-a770/https://ceylonprojectng.com/journal/what-it-actually-takes-to-drive-an-intel-arc-a770/Good documentation gets you past the product page. What's underneath is PCIe, MMIO, firmware, command submission, and a long staged plan instead of one heroic attempt at everything at once.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopGPU DriverPCIeIntel Arc A770https://ceylonprojectng.com/journal/could-an-intel-arc-a770-be-the-modern-amiga-custom-chipset/https://ceylonprojectng.com/journal/could-an-intel-arc-a770-be-the-modern-amiga-custom-chipset/The Arc A770 isn't a literal replacement for Agnus, Denise, and Paula. But one of the actual deciding factors in choosing it had nothing to do with raw performance: documentation is a hardware feature.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopIntel Arc A770GPUXe-HPGhttps://ceylonprojectng.com/journal/why-a-modern-amiga-needed-a-secure-multicore-microkernel/https://ceylonprojectng.com/journal/why-a-modern-amiga-needed-a-secure-multicore-microkernel/The display failure was a symptom. The actual disease was an architecture with no real boundaries between components. The fix was moving to a security-certified microkernel foundation.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopMicrokernelSecurity ArchitectureMulticorehttps://ceylonprojectng.com/journal/well-hell-the-iris-math-doesnt-work/https://ceylonprojectng.com/journal/well-hell-the-iris-math-doesnt-work/Pixels appearing on screen is not the same thing as an architecture that scales to real high-resolution video editing. I found that out the hard way, and I was irritated about it for the rest of the night.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopDisplay ArchitectureDebuggingNu-Irishttps://ceylonprojectng.com/journal/why-i-built-the-computer-in-qemu-before-i-built-the-computer/https://ceylonprojectng.com/journal/why-i-built-the-computer-in-qemu-before-i-built-the-computer/QEMU was never the destination. It was the laboratory — a reference machine where I could isolate architecture mistakes from hardware-driver mistakes before either one had a chance to hide behind the other.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopQEMUVirtual MachinesSystems Designhttps://ceylonprojectng.com/journal/project-nu-day-lets-actually-build-something/https://ceylonprojectng.com/journal/project-nu-day-lets-actually-build-something/All that research had to turn into something eventually. Project Nu-Day was the first real attempt: a modern media workstation, built for x86-64, inspired by the Toaster and DigiPaint but not trying to be either.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopProject Nu-Dayx86-64Media Workstationhttps://ceylonprojectng.com/journal/old-source-code-is-useful-copying-it-isnt-the-point/https://ceylonprojectng.com/journal/old-source-code-is-useful-copying-it-isnt-the-point/Having thirty-year-old source code available doesn't mean the job is to transcribe it. Here's how I actually use historical material as research instead of a shortcut.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopVideo ToasterReverse EngineeringClean Roomhttps://ceylonprojectng.com/journal/then-i-found-the-video-toaster-source-code/https://ceylonprojectng.com/journal/then-i-found-the-video-toaster-source-code/NewTek released the Video Toaster's source publicly years ago. That's where the real research thread started — not the Amiga's OS, but the thing that made the Amiga famous in the first place.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopVideo ToasterNewTekRetrocomputinghttps://ceylonprojectng.com/journal/what-was-actually-worth-saving-from-the-amiga/https://ceylonprojectng.com/journal/what-was-actually-worth-saving-from-the-amiga/Before building anything, I had to separate what I actually loved about the Amiga from what I just remembered fondly. Those turned out to be two different lists.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopAmigaSystems DesignArchitecture Principleshttps://ceylonprojectng.com/journal/what-if-amiga-development-never-stopped/https://ceylonprojectng.com/journal/what-if-amiga-development-never-stopped/Commodore went bankrupt in 1994 and took continuous Amiga development down with it. This is the question that started everything: what would still be true if it hadn't.Sun, 06 Sep 2026 12:00:00 GMTJournalProject CeylonWorkshopAmigaAlternate HistorySystems Design