SETB/SETNAE - Set if Below / Set if Not Above or Equal (386+)

        Usage:  SETB    dest
                SETNAE  dest
        (unsigned, 386+)
        Modifies flags: none

        Sets the byte in the operand to 1 if the Carry Flag is set
        otherwise sets the operand to 0.

                                 Clocks                 Size
        Operands         808x  286   386   486          Bytes

        reg8              -     -     4     3             3
        mem8              -     -     5     4             3


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