INT 21h - [2.0+]
Function 35h - Get Interrupt Vector DOS

Gets the address of the interrupt service routine for the specified interrupt vector.

Input:
AH = 35h
AL = interrupt number
Output:
ES:BX = segment:offset of interrupt handler
Comments:
This function must be used to ensure compatability with future versions of DOS.
See Also:
INT 21h Function 25h - Set Interrupt Vector