Technical notes, design reflections, mistakes we chose to publish. We post when we have something to say, not when it's scheduled. Some posts are long. Some are a screenshot and two sentences. Here are all of them.
Black Wire’s Director’s Cut. Why the scoreboard stopped being a score and became an eight-count indictment, how the Wire Bench lets you fabricate evidence without knowing it, and why a solver proves every operation winnable on every build.
READ FULL FILE →The Penumbra Directive. Why we compromise your intelligence from day one with a different mole every run, and how a causality timeline lets you trace any crisis back to the decision that caused it.
READ FULL FILE →Devlog v0.51. Covox Speech Thing and Disney Sound Source in Castalia 92: digital audio over the parallel port, paced by the PIT, and why we never probe for them.
READ FULL FILE →The stock FreeDOS KERNEL.SYS prints its banner from a packed image whose strings cannot be edited. For a 386 to boot saying CASTALIA DOS — and nothing else — we had to recompile the kernel from source.
READ FULL FILE →AmigaOS gives each process ~4 KB of stack, and copying a folder tree is recursive by nature. Why ChumOS copies single files with an 8 KB buffer and leaves recursive copy unimplemented, instead of pretending it works.
READ FULL FILE →Why Castalia DOS greets you with a menu of eight memory configurations instead of one clever autodetect. Spoiler: because DOS games do not forgive.
READ FULL FILE →A real-mode 386 has no screenshot button. How CI boots the compiled .EXE in DOSBox over Xvfb and grabs the screen with ImageMagick: the images come from the binary that ships, not from a reimplementation.
READ FULL FILE →Nothing in ChumOS polls. Every event arrives as a signal into a single Wait(), and the whole screen composes and blits in one beam-synced operation. Here is how.
READ FULL FILE →The entire CastaliaOS 98 PE interface composes into a 32-bit XRGB back buffer and presents to 8- or 16-bit hardware as dirty rectangles. No dithering, no palette search, no alpha.
READ FULL FILE →Devlogs, patches and internal leaks. Zero spam, zero analytics. Just what matters, when it matters.