Assembly | screen display numbers

function ：PRINT Subroutines are displayed on the screen AL The contents of the register ,0-9 Then... Is displayed on the screen 0-9, Greater than 9 Display English letters on the screen .

DATA  SEGMENT
      TABLE   DB    1,2,8,9,    10,11,34,35,    36,37,40,41,   42,43,66,67 
                    ;1-9  Show  1-9
                    ;10-35  Show A-Z
                    ;36-41  Show other characters 
                    ;42-67  Show a-z       
      NUM     EQU   ($-TABLE)     
DATA  ENDS


CODE  SEGMENT
      ASSUME:  CS:CODE, DS:DATA       
START:MOV   AX,DATA
      MOV   DS,AX   
            
      MOV   CX,NUM      ;CX preservation TABLE The number of numbers in the book , Used for circular judgment 
      LEA   SI,TABLE    ; Address of a pointer SI Point to TABLE First address of storage area 

L:    MOV   AL,[SI]
      CALL  PRINT
      INC   SI    
      LOOP  L         
                                                
      MOV   AH, 4CH
      INT   21H           
                   
; Display subroutine  
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

result ：

  Corresponding relation ：1-9 Show 1-9
                   10-35 Show A-Z
                   36-41 Show other characters
                    42-67 Show a-z