PROG    SEGMENT
        ORG     100H
        ASSUME  CS:PROG,DS:PROG,ES:PROG,SS:PROG
MAIN    PROC    NEAR
        JMP     START
V1      DW      0
START:
        MOV     AX,1234H
        MOV     BX,5678H
        MOV     DX,0ABCDH
        AND     AX,0000111111110000B
        AND     BX,0000000000001111B
        AND     DX,1111000000000000B
        OR      AX,BX
        OR      AX,DX
        MOV     DI,OFFSET V1
        MOV     [DI],AX
        MOV     AH,4CH
        INT     21H
MAIN    ENDP
PROG    ENDS
        END     MAIN