Constants:
In an assembly language program, constants are defined
through the use of the EQU directive.
These are the main points in using constant definitions:
| The EQU directive is used to assign a name to a constant.
|
| Use of constant names makes an assembly language easier to understand.
|
| No memory is allocated for a constant.
|
| Reference is made to a constant through immediate addressing mode.
|
Example:
The following shows examples on the declaration of constants.
Constant Declarations |
...
.data
LF EQU 0AH
PROMPT EQU “Type your name”
MSG DB “Type your name”
MDG DB PROMPT
.code
...
MOV DL, 0AH
MOV DL, LF
...
|