org 000h
jmp start

org 050h
start:
MOV TH1,#0FDH ; 9600 bps
MOV TL1,#0FDH ;Xtal 11.0592Mhz
MOV SP,#010H
MOV SCON,#050H
MOV TMOD,#021H
MOV TCON,#040H
loop:
call RD_serial
call WR_serial
jmp loop

WR_SERIAL:
CLR TI
MOV SBUF,A
JNB TI,$
RET

RD_SERIAL:
JNB RI,$
CLR RI ;
MOV A,SBUF
RET