Get Next Selector Increment Value


                 This function returns the 32-bit linear base address of
                 the specified segment.

            To Call

                 AX = 0006h
                 BX = Selector

            Returns

                 If function was successful:
                 Carry flag is clear.
                 CX:DX = 32-bit linear base address of segment

                 If function was not successful:
                 Carry flag is set.

            Programmer's Notes

                 o    This function  will fail if the selector specified
                      in BX is invalid