我是刚学不久的菜鸟,在做一个例子时出了问题,还望高手指点,谢谢 ORG 0000H LJMP START ORG 0030H
START: CLR P0.4 ACALL DELAY SETB P0.4 ACALL DELAY AJMP START
DELAY: MOV R7,#255 Y1: MOV R6,#255 DJNZ R6,$ DJNZ R7,Y1 RET END
可总是在引脚处报错 BASS.ASM(5): error A45: UNDEFINED SYMBOL BASS.ASM(7): error A45: UNDEFINED SYMBOL
用的芯片是philips 的P89C669
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