这个是大学的计算机接口实验课上经常用到的原程序

				     ;串行通信接收程序清单 
				        ORG    0100H
				        MOV    TMOD,  #20H
				        MOV    TH1,   #0F3H
				        MOV    TL1,   #0F3H
				        MOV    SCON,  #0D0H
				        MOV    PCON,  #80H
				        MOV    R0,    #30H
				        MOV    R2,    #0AH
				        SETB   TR1
				S1:     JBC    RI,    S2
				        AJMP   S1
				S2:     MOV    A,     SBUF
				        CLR    RI
				        MOV    SBUF,   A
				S3:     JBC    TI,    S4
				        SJMP   S3
				S4:     CLR    TI                                
				        MOV    @R0,    A
				        INC    R0
				        DJNZ   R2,    S1
				        SJMP   $
				        END