The EQU
pseudo-op defines a symbol and equates its value
to an expression. For example
thomas EQU 123h
The identifier thomas
will be given the value 123h.
EQU
is legal only when the symbol has not previously been defined. See
Set Directive for
redefinition of values.
This directive performs a similar function to the preprocessor’s
#define
directive (see Preprocessor Directives).