Function 25h (37)        Set Interrupt Vector

Sets the address of an interrupt handler.

On entry:      AH         25h
AL         Interrupt number
DS:DX      Address of interrupt handler

Returns:       Nothing

                                                                         

Notes:         Prior to calling, you may want to get the address of
the current interrupt handler (via Function 35h) so
that your program can restore the original routine
when it exits. This is the preferred way to set
interrupt vectors.

See also: 35h

25h (37) Set Interrupt Vector