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点亮LED灯汇编代码：

ORG 00HMAIN:    MOV P0,#00H    MOV P1,#00H    MOV P2,#00H    MOV P3,#00H    CALL DELAY    MOV P0,#FFH    MOV P1,#FFH    MOV P2,#FFH    MOV P3,#FFH    CALL DELY    JMP MAINDELAY:    MOV R3,#50D1:    MOV R4,#20D2:    MOV R5,#248    DJNZ R5,$    DJNZ R4,D2    DJNZ R3,D1    RET    END