MS-DOS BIOS RTC and FAT file timestamps: Interoperability of timezone handling
The goal is to ascertain whether MS‑DOS offers any built‑in means to interpret FAT directory timestamps as UTC or to apply a timezone offset when files are read or written across different regional settings. MS‑DOS stores file creation, modification and access times as local‑time values in FAT entries, derives those values from the BIOS real‑time clock via I
msdos