Get Protected Mode Interrupt Vector


                 This function  returns  the  CS:(E)IP  of  the  current
                 protected mode  interrupt  handler  for  the  specified
                 interrupt number.

            To Call

                 AX = 0204h
                 BL = Interrupt number

            Returns

                 Carry flag is clear.
                 CX:(E)DX = Selector:Offset of exception handler

            Programmer's Notes

                 o    The value returned in CX is a valid protected mode
                      selector, not a real mode segment.
                 o    32-bit mode  programs will  be returned  a  32-bit
                      offset in the EDX register.
                 o    All 100h  (256 decimal)  interrupt vectors must be
                      supported by the DPMI host.