DOS ain't dead

Error in XMS specification? - movp (Developers)

posted by bretjohn  , Rio Rancho, NM, 10.01.2026, 00:18

I'm guessing that the "reliability" may also depend on the amount of overlap. The overlap could be as small as 0 bytes (the source and destination are the same), and I don't know if there are alignment issues (like starting addresses must be Word-, DWord-, Paragraph, or Page--aligned).

At least theoretically, in a "well-written" app you wouldn't ever have any overlaps but that is, of course, unrealistic.

You are correct, though, that what's in the documentation (official or not) shouldn't be the exact opposite of reality.

Complete thread:

• Error in XMS specification? - ecm, 27.04.2019, 16:16 (Developers)
  • Error in XMS specification? - Oso2k, 27.04.2019, 20:20
    • Error in XMS specification? - ecm, 27.04.2019, 21:40
  • Error in XMS specification? - emu2 - ecm, 09.01.2026, 21:53
    • Error in XMS specification? - movp - ecm, 09.01.2026, 22:07
      • Error in XMS specification? - movp - bretjohn, 10.01.2026, 00:18