title: How to Convert this string to upper case by using interrupt?
body: <p>I written the below code. When I emulate it in emu8086 just shows me the letters in lower case on the screen.</p>
  
  <p>I want convert these characters to upper case by using another interrupt and function. How can it be done?</p>
  
  <pre><code>       LEA BX, MSG
         MOV AH, 2
         MOV CX, 26
  
    DON: MOV DL, [BX]                                                        
         INT 21H
         INC BX
         LOOP DON
         RET
  
         MSG DB 'study of assembly language'
  </code></pre>