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.287             Enable 80287 Instructions                          Directive

  .287

    Enables assembly of 80287 instructions.

       Notes:     See the description of .8087 for more information on
                  using this directive.

                  This directive should be used by programs that use
                  floating-point operations and only run on an 80286
                  system.

                  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 instruction set.