@DataSize               Indicates data size                 Predefined equate

    The @DataSize symbol indicates the default size of a data pointer in
    the current memory model. It's set to 0 for the memory models that use
    NEAR data pointers (TINY, SMALL, FLAT, MEDIUM), 1 for memory models
    that use FAR data pointers (COMPACT, LARGE, TPASCAL), and 2 for models
    using huge data pointers (HUGE and TCHUGE).