showtim1.asm

汇编-主要是一些从csdn收集的一些好的汇编代码

;偶遍第，记住纯dos运行（比较乱）

assume cs:code

code segment


start:
   mov al,9
   mov ch,al                    
   mov di,160*12+40*2           
j_a:
   out 70h,al                 
   in al,71h                    
   mov ah,al                    
   mov cl,4                     
   shr ah,cl                    
   and al,00001111b             
                                
   add ah,30h                   
   add al,30h                   
                                
   mov bx,0b800h                
   mov es,bx                    
   mov byte ptr es:[di],ah      
   mov byte ptr es:[di+2],al    
   cmp ch,4                     
   jna j_c                        
   cmp ch,7                     
   je j_b                         
   mov byte ptr es:[di+4],'/'   
   dec ch                       
   add di,6                     
   mov al,ch                    
   mov ah,0                     
   jmp short J_a                  
j_b:
   mov byte ptr es:[di+4],' ' 
                                
   mov ax,4                     
   mov ch,4                     
   add di,6                     
   jmp short j_a                  
j_c:
   cmp ch,0                   
   je j_ok                        
   mov byte ptr es:[di+4],':'   
   sub ch,2                     
   mov al,ch                    
   mov ah,0                     
   add di,6                     
   jmp short j_a                  
                                
j_ok:
   mov ax,4c00h              
   int 21h                      

code ends
      end start