org 100h
use16

 push string
 call params
 mov ah,09h
 int 21h
 ret

params :
        push bp
        mov  bp,sp
        push di
        mov  di,[bp+4]
        mov  cx,15

makeup:
      cmp byte[di],'a'
      jb  CheckNext

      cmp byte[di],'z'
      ja  CheckNext

      sub byte[di],32


CheckNext:
    inc DI
    loop makeup

EndProc:
    pop di
    pop bp
    ret 2










string db 'zAgLavnie bukvi'