DOS ain't dead

Watcom ASM + C puzzle, variable has conflicting addresses (Developers)

posted by bretjohn  , Rio Rancho, NM, 08.01.2026, 21:53

> Accessing data where DS points to does not need a segment override, but
> other segment registers need it. In other words, DS is the default segment.

Actually, this isn't true in all cases. For example, some OpCodes such as certain string-related ones (STOSx, MOVSx, INSx, etc.) use ES by default, and anything which uses BP as part of a pointer uses SS by default.

Complete thread:

• Watcom ASM + C puzzle, variable has conflicting addresses - bencollver, 31.12.2025, 23:25 (Developers)
  • Watcom ASM + C puzzle, variable has conflicting addresses - jadoxa, 01.01.2026, 02:06
    • Watcom ASM + C puzzle, variable has conflicting addresses - Rugxulo, 01.01.2026, 03:44
  • Watcom ASM + C puzzle, variable has conflicting addresses - Japheth, 01.01.2026, 09:01
    • Watcom ASM + C puzzle, variable has conflicting addresses - bencollver, 01.01.2026, 16:35
      • Watcom ASM + C puzzle, variable has conflicting addresses - Japheth, 01.01.2026, 18:57
        • Watcom ASM + C puzzle, variable has conflicting addresses - bencollver, 01.01.2026, 21:07
  • Watcom ASM + C puzzle, variable has conflicting addresses - boeckmann, 01.01.2026, 21:09
    • Watcom ASM + C puzzle, variable has conflicting addresses - bencollver, 01.01.2026, 21:32
      • Watcom ASM + C puzzle, variable has conflicting addresses - Japheth, 01.01.2026, 21:51
      • Watcom ASM + C puzzle, variable has conflicting addresses - boeckmann, 01.01.2026, 21:56
        • Watcom ASM + C puzzle, variable has conflicting addresses - boeckmann, 01.01.2026, 21:58
          • Watcom ASM + C puzzle, variable has conflicting addresses - bencollver, 01.01.2026, 22:54
            • Watcom ASM + C puzzle, variable has conflicting addresses - boeckmann, 01.01.2026, 23:26
              • Watcom ASM + C puzzle, variable has conflicting addresses - bencollver, 02.01.2026, 17:42
                • Watcom ASM + C puzzle, variable has conflicting addresses - bencollver, 03.01.2026, 18:09
                  • Watcom ASM + C puzzle, variable has conflicting addresses - ecm, 03.01.2026, 21:23
                  • Watcom ASM + C puzzle, variable has conflicting addresses - bencollver, 16.01.2026, 04:44
              • Watcom ASM + C puzzle, variable has conflicting addresses - Japheth, 04.01.2026, 05:21
                • Watcom ASM + C puzzle, variable has conflicting addresses - rr, 04.01.2026, 11:40
                  • Watcom ASM + C puzzle, variable has conflicting addresses - bencollver, 04.01.2026, 15:31
                    • Watcom ASM + C puzzle, variable has conflicting addresses - Japheth, 04.01.2026, 16:21
  • Watcom ASM + C puzzle, variable has conflicting addresses - samwdpckr, 02.01.2026, 08:50
    • Watcom ASM + C puzzle, variable has conflicting addresses - bretjohn, 08.01.2026, 21:53