DOS ain't dead

ALed (ALan's Text Editor) version 1.53 now free (Announce)

posted by jadoxa  , Queensland, Australia, 20.05.2025, 09:19
(edited by jadoxa on 20.05.2025, 09:57)

> Actually, I think the range for valid DOS dates is 1980 to 2107 - 128 year
> range.

I think that's mostly the filesystem (year/month/day encoded in 16 bits, so there's only room for a 7-bit year). Some functions are bytes (so 1980 + 255 = 2235), others are words.

FreeDOS explicitly fails trying to set the year above 2099; it should still read the year (if you bypass DOS 2Bh), at least up to 6 June 2159 (65535 days after 1/1/1980).

Complete thread:

• ALed (ALan's Text Editor) version 1.53 now free - rr, 13.05.2025, 22:18 (Announce)
  • ALed (ALan's Text Editor) version 1.53 now free - jadoxa, 14.05.2025, 04:08
    • ALed (ALan's Text Editor) version 1.53 now free - rr, 19.05.2025, 21:19
      • ALed (ALan's Text Editor) version 1.53 now free - jadoxa, 20.05.2025, 02:15
        • ALed (ALan's Text Editor) version 1.53 now free - Zyzzle, 20.05.2025, 06:22
          • ALed (ALan's Text Editor) version 1.53 now free - jadoxa, 20.05.2025, 09:19
        • ALed (ALan's Text Editor) version 1.53 now free - rr, 20.05.2025, 12:18
  • ALed (ALan's Text Editor) version 1.53 now free - bocke, 17.05.2025, 22:32
    • ALed (ALan's Text Editor) version 1.53 now free - rr, 19.05.2025, 21:21