单片机汇编用的ATMEL AT89S51 12M晶振 奇奇怪怪的错误 很短的一个小程序

  ORG 0000H

LJMP MAIN
ORG 0003H
LJMP INT0

ORG 0060H
MAIN:
MOV R7,#19H
MOV R3,#07H
SETB EA
SETB EX0

SETB IT0
MOV DPTR,#TAB1

LOOP:

MOV A,R3
ADD A,#0AH
MOV P0,#01H
MOVC A,@A+DPTR
MOV P2,A
MOV R4,#4FH
DJNZ R4,$
MOV P2,#0FFH
AJMP LOOP

INT0: INC R3
MOV R3,#00H
RETI

TAB1: DB 0C0H,0F9H,0A4H,0B0H,099H,92H,82H,0F8H,80H,90H ; 数码管数字有点
DB 40H,79H,24H,30H,19H,12H,02H,78H,00H,10H ; 数字 无点

  end


    waizhongduan.asm(4): error A46: CODE-ADDRESS EXPECTED     LJMP INT0   那一行

waizhongduan.asm(26): error A8: ATTEMPT TO DEFINE AN ALREADY DEFINED LABEL
INT0: INC R3 那一行