将data段所在的数据转换为首字母大写

;===============================
;    将data段所在的数据
;    转换为首字母大写
;
;===============================
assume cs:code,ds:data

data segment
    db '1. file         '
    db '2. edit         '
    db '3. view         '
    db '4. tools        '
    db '5. help         '
data ends

code segment
  start:mov dx,data
    mov ds,dx
    mov cx,5
    mov bx,3

      s:mov al,[bx]
    and al,11011111B
    mov [bx],al
    inc dx
    mov ds,dx
    loop s

    mov ax,4c00h
    int 21h
code ends
end start