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.8087            Enable 8087 Instructions                           Directive

  .8087

    Enables assembly of 8087 instructions and disables assembly of 80287
    instructions.

       Note:      When using .8087 or .287, include /R or /E on the
                  command line to specify how the assembler is to handle
                  floating-point instructions.  They are defined below:

       /R         Assembler generates actual instruction code for
                  floating-point instructions.

       /E         Assembler generates code that can be used by a floating-
                  point emulation routine.

       Notes:     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.

                  If no instruction set directives are specified, .8086
                  and .8087 are used.