MOV  TMOD,#20H             ;timer 1, mode 2
MOV  TH1,#-3                    ;9600 baud
MOV  SCON,#50H
SETB
TR1
AGAIN:  MOV 
A,#”Y”                       
;transfer “Y”
ACALL
TRANS
MOV  A,#”E”                       ;transfer “E”
ACALL
TRANS
MOV  A,#”S” ;transfer “S”
ACALL
TRANS
SJMP
AGAIN                       ;keep doing
it
 
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