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.
The following shows examples on the declaration of constants.
LF EQU 0AH
PROMPT EQU “Type your name”
MSG DB “Type your name”
MDG DB PROMPT
MOV DL, 0AH
MOV DL, LF