COA LAST LAB2

.MODEL SMALL
.STACK 100H
.DATA
V1 DB ?
V2 DB ?
M1 DB "ENTER UPPER: $"
M2 DB 10,13,"ENTER LOWER: $"
M3 DB 10,13,"LOWER IS: $"
M4 DB 10,13,"UPPER IS: $"
.CODE
MAIN PROC
     MOV AX,@DATA
     MOV DS,AX

     LEA DX,M1
     MOV AH,9
     INT 21H

     MOV AH,1
     INT 21H
     MOV BL,AL

     LEA DX,M2
     MOV AH,9
     INT 21H

     MOV AH,1
     INT 21H
     MOV CL,AL

     LEA DX,M3
     MOV AH,9
     INT 21H

     MOV AH,2
     ADD BL,20H
     MOV DL,BL
     INT 21H

     LEA DX,M4
     MOV AH,9
     INT 21H

     MOV AH,2
     SUB CL,20H
     MOV DL,CL
     INT 21H



     MOV AH,4CH
     INT 21H
     MAIN ENDP
END MAIN