1. Features: When the code is compiled, the position of the symbol will be replaced with the constant it represents.
2. = pseudocommand
2.1 syntax
Name = expreion
2.1.1 expression can only be an integer or integer expression
2.1.2. names can be repeatedly defined as different integer or integer expressions.
For example:
Count = 500
Size = ($-list)
3. equ pseudocommand
3.1 syntax
Name equ expression
Name equ symbol
Name equ <text>
3.1.1 expression can only be an integer or integer expression
3.1.2. the symbol must be a symbolic name defined by "=" or "equ ".
3.1.3 text content must be in angle brackets
3.1.4. names cannot be defined repeatedly.
4. textequ pseudocommand
4.1 syntax
Name textequ % expression
Name textequ symbol
Name textequ <text>
4.1.1 expression can only be an integer or integer expression
4.1.2. symbol must be a symbolic name defined by "=", "equ", or "textequ ".
4.1.3 text content must be in angle brackets
4.1.4 and name can be defined repeatedly