1 1 7.26 '.equiv SYMBOL, EXPRESSION' 1 ================================ 1 1 The '.equiv' directive is like '.equ' and '.set', except that the 1 assembler will signal an error if SYMBOL is already defined. Note a 1 symbol which has been referenced but not actually defined is considered 1 to be undefined. 1 1 Except for the contents of the error message, this is roughly 1 equivalent to 1 .ifdef SYM 1 .err 1 .endif 1 .equ SYM,VAL 1 plus it protects the symbol from later redefinition. 1