HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

           TC: void setvect( int intr_num, void interrupt(*isr)() )

       - prototype in dos.h

       - sets the value of interrupt vector named by intr_num
         (corresponds to 0-255 for MS-DOS) in DOS interrupt vector
         table to a far pointer to "isr" an interrupt service routine
       - address of a C routine may be used only if it has been
         declared to be an interrupt routine.  Ex:

                         void interrupt func( void );

       - MS C uses _dos_setvect()
       - see   INT 21,25

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