Operating systems, infrastructure, emulation, and technical history.
How to distinguish absent media from an exhausted DOS CDS table, audit block drivers and redirectors, set LASTDRIVE safely, and reclaim memory.
A reversible CuteMouse setup covering PS/2, serial and BIOS USB paths, TSR detection, high loading, exit codes, compatibility testing, and rollback.
A write-minimized preservation workflow for floppy and hard-disk media using stable identity, raw images, checksums, read logs, and duplicate-image tests.
An isolated Windows 3.1 compatibility test on FreeDOS covering legal media, kernel support, modes, memory managers, drivers, backups, and rollback.
How DOS packet drivers expose Ethernet classes, receiver callbacks, send operations, handles, interrupt vectors, and hardware-specific configuration.
How to attribute ZFS space to boot environments, snapshots and clones, identify holds and origins, prune safely, and keep rollback capacity measurable.
A layer-by-layer GEOM investigation for mounted filesystems, swap, labels, encryption, mirrors, open consumers, stale metadata, and safe teardown.
How to observe devd events, match stable properties, call a constrained helper, control concurrency, test detach paths, and preserve boot reliability.
A safe FreeBSD swap-encryption procedure using a fresh GELI key each boot, verified device identity, fstab integration, crash-dump tradeoffs, and tests.
A method for classifying FreeBSD settings by lifecycle so boot tunables, runtime sysctls, service variables, and device hints live in the right file.