Memory models, FAT, interrupts, and the open-source continuation of the original PC OS.
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.
A non-destructive FreeDOS recovery sequence for imaging the disk, auditing partitions and active flags, repairing boot code, and verifying files.
How to identify CPU-bound timing loops and choose throttling, cache, emulator-cycle, or period-correct hardware solutions without damaging the installation.
How to image first, distinguish media failure from filesystem damage, and use CHKDSK-style repair only after preserving evidence.
Diagnose FreeDOS HIMEM and EMM386 conflicts with a controlled boot menu that isolates XMS, EMS, UMB, ROM exclusions, and driver order.
Fix FreeDOS keyboard and codepage mismatches by separating scan-code mapping from display glyphs and aligning COUNTRY, KEYB, MODE, and fonts.