.186             Enable 80186 Instructions                     MASM Directive

  .186

    Enables assembly of 80186 instructions, as well as 8086 instructions.

       Notes:     This directive should only be used for programs which
                  will only run on 80186 systems.

                  Place all Instruction set directives at the beginning of
                  the source file to insure that all instructions in the
                  file are assembled using the same microprocessor
                  instruction set.