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 Pointers Passed to DOS and the BIOS
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     Software interrupts, such as DOS and BIOS interrupts, that pass data
     pointers to DOS or the BIOS, require special handling to ensure that the
     data pointers will be accessible while DOS or the BIOS is executing.
     Most DOS interrupts are handled transparently by CA-Clipper/ExoSpace,
     and support is provided, in the form of packages, for common interrupts
     such as INT 10 and INT 25. See the Packages section in the
     "CA-Clipper/ExoSpace Commands" chapter.