Assemble | find the maximum and minimum values

  function ： Bubble sort finds the maximum and minimum values

DATA  SEGMENT
      TABLE  DB   1,2,10,20,5,7,6
      NUM    EQU  ($-TABLE)-1     ; The number of bubble sorting is the number of elements n-1
DATA  ENDS     



CODE  SEGMENT
      ASSUME:  CS:CODE, DS:DATA  
      
START:MOV  AX, DATA
      MOV  DS, AX    
      
      ; Get ready 
      MOV  CX, NUM        ; The length of the memory （ The number of numbers ）
      LEA  SI, TABLE      ; Address of a pointer SI Point to TABLE First address of storage area 
      MOV  BH, [SI]       ; Put the first number in BH, Save the current maximum 
      MOV  BL, [SI]       ; Put the first number in BL, Save the current minimum 
                
      ; Find the maximum and minimum 
      CALL FIND        
          
      ; Show maximum 
      MOV  AL, BH                                       
      CALL PRINT
                 
      ; Show minimum 
      MOV  AL, BL         
      CALL PRINT
      
      ; Back to the operating system 
      MOV  AH, 4CH
      INT  21H            
        
        
        
       
; Find the maximum and minimum  ---  The results are stored in BH,BL in                    
FIND  PROC NEAR      
    
L:    INC  SI             ; The pointer SI Move to the next number 
      MOV  AL,  [SI]      ;AL --  Current number 
            
      CMP  AL, BL        ; And BL Compare 
      JB   NEXT1          ;AL Less than BL --- BL Replace with a smaller value 
      
      CMP  AL,  BH        ; And BH Compare 
      JB   NEXT2          ;AL Less than BH ---  Cycle down       
      
      MOV  BH,  AL        ; otherwise BH Replace with a larger value  
      
      JMP  NEXT2          ; Cycle down 

      
NEXT1:MOV  BL,  AL        ;BL Replace with a smaller value 
      JMP  NEXT2          

NEXT2:LOOP L              ; Check whether the cycle stops 

      RET
FIND  ENDP
               
               
               
        
        
; Displays the maximum and minimum values  ---  Show that the number exists AL in               
PRINT PROC NEAR                
      PUSH  DX 
       
      MOV   DL,AL        
      CMP   DL,9        ; Determine whether  <=9
      JLE   ADD1        ;  yes   ---> ASCII Code plus 30H     
      JNLE  ADD2        ; No  ---> ASCII Code plus 37H   
            
ADD1: ADD   DL,30H
      JMP   PRI     
               
ADD2: ADD   DL,37H        
      
PRI:  ; Show 
      MOV   AH,02H       
      INT   21H                        
      ; Carriage return 
      MOV   DX,0DH       
      INT   21H       
      ; Add line breaks 
      MOV   DL,0AH         
      INT   21H   
                           
      POP   DX       
      RET                       
PRINT ENDP



    
CODE  ENDS
    END   START