最近编了一个小程序，目的：将ax中的数分成四组，并输出到AL,BL,CL,DL中。要求输出形式为：
the result of the question 5.3:
1 is the num of AL;
2 is the num of BL;
3 is the num of CL;
4 is the num of DL.
可我的这个程序的输出却是：
the result of the question 5.3:
☺ is the num of AL;
☻ is the num of BL;
♥ is the num of CL;
♦ is the num of DL.(其中&#9786等在输出窗口上显示为笑脸和棱形等,不是数字1,2,3,4)
请问各位高手,这是怎么一回事？应该如何改？源程序如下：
;**************************************************
data_seg segment
  a db 'the result of the question 5.3:',0dh,0ah,'$'
  b db ?
  c db ?
  d db ?
  e db ?
  string1 db ' is the num of AL;',0dh,0ah,'$'
  string2 db ' is the num of BL;',0dh,0ah,'$'
  string3 db ' is the num of CL;',0dh,0ah,'$'
  string4 db ' is the num of DL.',0dh,0ah,'$'
data_seg ends
;**************************************************  
code_seg segment
  assume ds:data_seg,cs:code_seg
start:
            mov ax,data_seg
            mov ds,ax
            
            mov dx,offset a   ;output a string
            mov ah,9
            int 21h
            
            mov ax,1234h      ;get the first 4 bit of the num(1234h)
            mov cl,4
      rol ax,cl
      and ax,000fh
      mov b,al
      
      mov ax,1234h      ;get the second 4 bit of the num(1234h)
      mov cl,8
      rol ax,cl
      and ax,000fh
      mov c,al
      
      mov ax,1234h      ;get the third 4 bit of the num(1234h)
      mov cl,0ch
      rol ax,cl
      and ax,000fh
      mov d,al
      
      mov ax,1234h      ;get the last 4 bit of the num(1234h)
      and ax,000fh
      mov e,al
      
      mov ah,2          ;output the fitst 4 bit of the num
      mov dl,b
      int 21h
      mov dx,offset string1
      mov ah,9
      int 21h
      
      mov ah,2          ;output the second 4 bit of the num
      mov dl,c
      int 21h
      mov dx,offset string2
      mov ah,9
      int 21h
      
      mov ah,2          ;output the third 4 bit of the num
      mov dl,d
      int 21h
      mov dx,offset string3
      mov ah,9
      int 21h
      
      mov ah,2          ;output the last 4 bit of the num
      mov dl,e
      int 21h
      mov dx,offset string4
      mov ah,9
      int 21h
      
      mov al,b
      mov bl,c
      mov cl,d
      mov dl,e
      
      mov ah,4ch
      int 21h                                  
code_seg ends      
;**************************************************
   end start