Overview         Overview of the Directives and Operators

        Directives are instructions to the assembler; they do not appear in
        the final machine code. Operators are special instructions usually
        having to do with math functions you wish the assembler to perform
        on immediate data. The Turbo Assembler (TASM) can use all of the
        Macro Assembler's (MASM) directives and operators plus a few more;
        those that only TASM can use are marked as TASM directives or TASM
        operators.