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FSETPM          Set protected mode                   Exceptions: None
                                                     C3 C2 C1 C0: [?]
FSETPM                                               FPU: 80287 only

        Logic   set protected mode

    This instruction does nothing on the 80387 and later FPUs; it is an
    80287 instruction only. It is required to signal that the CPU is
    entering protected mode.


    Opcode      Format
    9B DB E4    FSETPM


    Timing
    Operand       8087         287        387      486     Pentium
    -              -           2-8        12        3       1      NP