TITLE PROG3-4 (EXE) LOWERCASE TO UPPERCASE CONVERSION
  PAGE 60,132
  .MODEL SMALL
  .STACK 64
  .DATA
  DATA1 DB `mY NAME is jOe'
  ORG 0020H
  DATA2 DB 14 DUP(?)
  .CODE
  MAIN PROC FAR
  MOV AX,@DATA
  MOV DS,AX
  MOV SI,OFFSET DATA1 
  MOV BX,OFFSET DATA2 
  MOV CX,14 
BACK:MOV AL,[SI] 
  CMP AL,61H 
  JB OVER 
  CMP AL,7AH 
  JA OVER 
  AND AL,11011111B 
OVER:MOV [BX],AL 
  INC SI 
  INC BX 
  LOOP BACK 
  MOV AH,4CH
  INT 21H 
  MAIN ENDP
  END MAIN