Conceptual, architectural explainers - how a subsystem actually works underneath.
A source-backed tour of FreeDOS device headers, character and block drivers, request packets, entry points, INIT, status words, and loading risks.
A forensic guide to FreeDOS FAT12, FAT16 and FAT32 layout, cluster typing, directory and VFAT entries, allocation chains, mirrors, corruption, and recovery.
A register-level guide to the interrupt vector table, FreeDOS INT 21h dispatch, file and process calls, Carry Flag errors, BIOS services, TSR hooks, and reentrancy.
A source-backed guide to FreeDOS conventional memory, UMBs, the HMA, XMS and EMS, with safe Jemm and Himem configuration and troubleshooting practices.
A verified guide to FreeDOS ZIP packages, FDIMPLES, FDINST and FDNPKG, including real commands, metadata, local media, repositories, updates, and trust risks.
A practical 2026 guide to running FreeDOS 1.4 in QEMU, virtual machines, emulators or real hardware, with verified boot, USB, firmware and network safety advice.
A forensic guide to DOS TSR residency, interrupt hooks, chaining, INT 28h and InDOS reentrancy, multiplex IDs, memory ownership, safe unloading, and testing.
A precise comparison of FreeDOS and MS-DOS across APIs, executables, kernels, shells, filesystems, hardware, licensing, undocumented behavior, and testing.
How bhyve combines FreeBSD's vmm kernel support, explicit virtual devices, UEFI firmware, networking, and lifecycle controls.
A forensic walkthrough of FreeBSD startup from BIOS or UEFI firmware through loader, kernel initialization, init, and ordered rc services.