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CROSS ASSEMBLER->Assembler Expressions->Symbols

Symbols in the expression take the value assigned to them in other parts of the source program.

Two special symbols generated by the cross assembler are '$' and NARG (or narg).

'$'    When this is used as a symbol it takes the current value of the program counter.

NARG    This is only allowed within a macro definition and takes the value, during the expansion of the macro, equal to the number of arguments used in the macro call.

In addition, if a symbol represents a bit addressable byte, it can be used to address a bit within that byte by appending a period to it followed by an expression specifying the position of the bit within the byte.

For example:

bit3    equ    3
test    data    20h
    setb    test.4
    setb    test.bit3