编写一个微机原理的程序，比较两个字符串是否相等

给你个代码
DATAS SEGMENT
buf1 db 90,91 dup(0)
buf2 db 90 dup(0)
;此处输入数据段代码
DATAS ENDS

STACKS SEGMENT
;此处输入堆栈段代码
STACKS ENDS

CODES SEGMENT
ASSUME CS:CODES,DS:DATAS,SS:STACKS
START:
MOV AX,DATAS
MOV DS,AX
lea dx,[buf1]
mov ah,10
int 21h
lea si,[buf1+2]
mov cl,[buf1+1]
lea di,[buf2]
NEXT:
cmp byte ptr[si],20h
jz lab1
jnz lab2
lab2:
mov al,[si]
mov [di],al
inc di
lab1:
inc si
loop NEXT
mov byte ptr[di],'$'
mov ah,2
mov dl,10
int 21h
mov ah,9
lea dx,[buf2]
int 21h
MOV AH,4CH
INT 21H
CODES ENDS
END START

DATA
SEGMENT
LEN
DB
10
(字符个数)
STR1
DB
'0123456789'
（字符1，单引号中可改，相应的LEN也要变化的）
STR2
DB
'0123456789'
RESULT
DB
0FFH
DATA
ENDS
CODE
SEGMENT
ASSUME
CS:CODE,DS:DATA
START:
MOV
AX,DATA
MOV
DS,AX
MOV
ES,AX
MOV
CL,LEN
MOV
CH,0
MOV
SI,OFFSET
STR1
MOV
DI,OFFSET
STR2
CLD
REPE
CMPSB
JNZ
LP_NO
MOV
RESULT,56H
JMP
LP_END
LP_NO:
MOV
RESULT,4EH
LP_END:
MOV
AH,4CH
INT
21H
CODE
ENDS
END
START