如何在汇编语言环境下打开打定的文件，被打开的文件中的内容将显示
在debug环境下，-u,-u,-g,可见被打开的内容;试一下吧!!

data            segment
file             db    'c:\program\aa.txt' , 0      
buf             db   256 dup(0)        
handle           dw  ?                
data             ends
code            segment
                assume  cs:code  , ds:data
start:
              mov ax , data
              mov ds , ax   
              mov dx , offset file  
              mov al , 0               
              mov ah , 3dh             
              int 21h                  
              mov handle , ax           
              mov bx , ax
              mov cx , 255
              mov dx , offset buf
              mov ah , 3fh
              int 21h                  
              mov bx , ax              
              mov buf[bx] , '$'          
              mov dx , offset buf
              mov ah , 9
              int 21h                            
              mov bx , handle
              mov ah , 3eh
              int 21h                            
              mov ah , 4ch
             int 21h
code   ends
             end  start
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