我似乎无法在程序集中输出大于 128 的整数。它可以正常工作，直到我将数字相加/乘以得到大于 128 的整数。它返回一个垃圾字符。帮助！我怎样才能输出这些整数。这是完整的代码。
TITLE
.MODEL SMALL
.STACK 64
.DATA
MSGA DB 13,10,"Input Equation: ","$"
MSGB DB 13,10,"The sum is ","$"
MSGC DB 13,10,"The difference is ","$"
MSGD DB 13,10,"The product is ","$"
MSGE DB 13,10,"The quotient is ","$"
MSGF DB 13,10,"The difference is -","$"
MSGG DB 13,10,"The remainder is ","$"
OP1A db ?
OP1B db ?
OPRND db ?
OP2A db ?
OP2B db ?
RESULT db ?
NUM1 db ?
NUM2 db ?
;FOR THREE DIGIT OUTPUTS
FIRST db ?
SECOND db ?
THIRD db ?
.CODE
MAIN PROC NEAR
MOV AX, @DATA
MOV DS, AX
@STRT:
LEA DX, MSGA
MOV AH, 09H
INT 21H
;Get tens digit of first number
MOV AH, 01H
INT 21H
SUB AL, '0'
MOV OP1A, AL
;Get ones digit of first number
MOV AH, 01H
INT 21H
SUB AL, '0'
MOV OP1B, AL
;get OPERAND
MOV AH, 01H
INT 21H
MOV OPRND, AL
;Get tens digit of second number
MOV AH, 01H
INT 21H
SUB AL, '0'
MOV OP2A, AL
;Get ones digit of second number
MOV AH, 01H
INT 21H
SUB AL, '0'
MOV OP2B, AL
XOR AX, AX
XOR BX, BX
;Form the NUM2
MOV AL, OP2A
MOV BL, 10
MUL BL
ADD AL, OP2B
MOV NUM2, AL
;Form the NUM1
MOV AL, OP1A
MUL BL
ADD AL, OP1B
MOV NUM1, AL
XOR AX, AX
XOR BX, BX
;CHECK WHAT OPERAND IT IS
CMP OPRND, '+'
JE @ADD
CMP OPRND, '*'
JE @MULTI
CMP OPRND, '-'
JE @SUB
CMP OPRND, '/'
JE @DIV
CMP OPRND, '%'
JE @DIV
JMP @EXIT
;DIVIDE
@DIV:
CMP NUM2, 0
JE @EXIT
XOR AX, AX
MOV AL, NUM1
MOV BL, NUM2
DIV BL
CMP OPRND, '%'
JE @MOD
MOV RESULT, AL
LEA DX, MSGE
MOV AH, 09H
INT 21H
JMP @PRINT
;MODULO
@MOD:
MOV RESULT, AH
LEA DX, MSGG
MOV AH, 09H
INT 21H
JMP @PRINT
;SUBTRACT
@SUB:
MOV AL, NUM2
CMP NUM1, AL
JGE @PSTV
;Add the negative sign
LEA DX, MSGF
MOV AH, 09H
INT 21H
SUB AL, NUM1
MOV RESULT, AL
JMP @PRINT
@PSTV:
MOV AL, NUM1
SUB AL, NUM2
MOV RESULT, AL
LEA DX, MSGC
MOV AH, 09H
INT 21H
JMP @PRINT
;MULTIPLY
@MULTI:
MOV AL, NUM2
MOV BL, NUM1
MUL BL
MOV RESULT, AL
LEA DX, MSGD
MOV AH, 09H
INT 21H
JMP @PRINT
;ADD
@ADD:
MOV AL, NUM2
ADD AL, NUM1
MOV RESULT, AL
LEA DX, MSGB
MOV AH, 09H
INT 21H
JMP @PRINT
;Print RESULT
@PRINT:
CMP RESULT, 9
JLE @ONEDIGIT
CMP RESULT, 99
JLE @TWODIGITS
;Separate the FIRST digit
XOR AX, AX
XOR BX, BX
MOV AL, RESULT
MOV BL, 100
DIV BL
MOV RESULT, AL
MOV RESULT, AH
;Output the HUNDREDTHS frigging digit
ADD FIRST, '0'
MOV DL, FIRST
MOV AH, 02H
INT 21H
@TWODIGITS:
XOR AX, AX
XOR BX, BX
;Separate the two remaining frigging digits
MOV AL, RESULT
MOV BL, 10
DIV BL
MOV SECOND, AL
MOV THIRD, AH
;Output the TENS frigging digit
ADD SECOND, '0'
MOV DL, SECOND
MOV AH, 02H
INT 21H
;Output the ONES frigging digit
ADD THIRD, '0'
MOV DL, THIRD
MOV AH, 02H
INT 21H
JMP @EXIT
@ONEDIGIT:
ADD RESULT, '0'
;Print one digit
MOV DL, RESULT
MOV AH, 02H
INT 21H
@EXIT:
MOV AH, 4CH
INT 21H
MAIN ENDP
;--------
END MAIN