8086汇编中数组元素读取至AL寄存器异常问题求助

我在8086汇编中尝试访问用户输入的数组（输入值为12134），每次迭代将数组元素存入AL寄存器。但在arr_acc过程中，第一个元素存入AL的值为31，第二个为32，和预期的1、2不符。已尝试用SI替代DI、直接自增BX的方法，问题仍未解决。

相关代码如下：

;read and access array

DIM EQU 5 

.MODEL small
.STACK
.DATA   

arr DB DIM DUP(?)  

.CODE
.STARTUP  

MOV BX, OFFSET arr  ;Storing the address of arr to bx
CALL READ           ; Calling the read procedure to input data into arr

MOV BX, OFFSET arr  ;Storing the address of arr to bx
CALL arr_acc        ;Calling the procedure that should access each element of the array and store each element
                    ;in AL with every iteration
       
.EXIT

; PROCEDURES

; Read PROC 
    
MOV DI, 0 
MOV AH, 1 ; set AH for reading 

lab1:   INT 21H ; read a character
        MOV BX[DI], AL ; store the character
        INC DI ; go to next element
        CMP DI, DIM ; compare array index with 0
        JNE lab1 ; jump if not equal

RET 

Read ENDP  

arr_acc PROC
     
MOV AX,0
MOV DI,0 

lop: CMP DI,DIM                ; checking if the DI reached the maximum index DIM
     JE  EXIT_LOP              ;exit the lop which will exit the procedure as well
     MOV AL, BX[DI]            ; Moving the first element in AL
     INC DI                    ; increment DI to get to the next element
     JMP lop                   ; jump back to the loop
                                
EXIT_LOP:    

RET
arr_acc ENDP 

END

尝试的解决方法：

• 使用SI寄存器替代DI
• 仅使用BX并按1自增（因数组为字节类型）

内容的提问来源于stack exchange，提问作者Mohamed Khaled