OPERATIONS_CUSTOM.asm

;FACTORIAL

DATA SEGMENT 

    DATA1 DB 23H

    DATA2 DW 1234H

    DATA3 DB 0H

    DATA4 DW 0H

    DATA5 DW 2345H,6789;ARRAY

    DATA ENDS 

;DIFFERENT DATA IN DATA SEGMENT 

CODE SEGMENT     
    
    ASSUME CS : CODE , DS : DATA 
    
    MOV AX,DATA ; INITIALISE DS TO POINT TO START OF THE MEMORY
    
    MOV DS,AX ; SET ASIDE FOR STORING OF DATA 
    
    MOV AL,25H ; L MEANS 8 BIT REG , STORING 25H TO AL REG
    
    MOV AX,2345H ; X MEANS 16 BIT REG ,COPY 2345H INTO AX REG 
    
    MOV BX,AX ; COPY THE CONTENT OF AX INTO BX REGISTER 
    
    MOV CL,AL ; COPY THE CONTENT OF AL REGISTER TO CL
    
    MOV AL,DATA1 ; COPIES THE BYTES CONTENT OF THE DATA SEGMENT MEMORY 
    
    MOV AX,DATA2 ; COPIES THE ALL CONTENTS OF DATA SEGMENT , LOCATION DATA2 INTO 16 BIT AX
    
    MOV DATA3,AL ; AL--> DATA3
    
    MOV DATA4,AX ; AX--> DATA4
    
    MOV BX,OFFSET DATA5 ; THE 16BIT OFFSET ADDRESS OF THE DS MEMORY 
                         
    MOV AX,[BX] ; INDIRECT ADDRESSING 
    
    MOV DI,02H ; 
    
    MOV AX,[BX+DI] ;,MEMORY LOCATION ADDRESS BY BX + DI INTO AX (BASE PLUS INDIRECT ADDRESSSING)
    
    MOV AX,[BX+002H] ; COPIES THE WORD CONTENT OF DATA SEGMENT 
    
    MOV AL,[DI,2] ;REGISTER RELATIVE INDEXING 
    
    MOV AX,[BX + DI + 002H] ; MEMORY LOCATION ADDRESS BY BX+DI+002H INTO AX 16 BIT 
    
    CODE ENDS 
ENDS START 
ENDS