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 Uninitialized Register Structures
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     General purpose interrupt signaling C functions written for DOS, such as
     int86x(), intdos(), and sysint(), may be passed a structure with values
     for the segment registers.  If these values are not assigned, a
     protection exception will occur when the library function tries to load
     the uninitialized data from the structure into the segment registers.

     Replacement modules for these functions are provided in the
     CA-Clipper/ExoSpace library.