Int 69 Fn 6996  - Isr.com V1.00 - Specify Interrupt Handler                [G]

   AX = 6996h
   DS:DX -> interrupt handler or 0000h:0000h to disable

Return: AX = 9669h
Program: ISR (Interrupt Service Reflector) is a TSR by Rich Bono which permits
     a program to provide hardware interrupt handlers even while being
     debugged with a debugger that swaps interrupt vectors during
     debugging.

Note:  the interrupt vector which is to be reflected is set at installation
     time and cannot be changed