ORG 0000H
LJMP MAIN
ORG 001BH
LJMP T1ISR
ORG 0030H
MAIN:
MOV TMOD,#10H
MOV TH1,#HIGH(65536-50000)
MOV TL1,#LOW(65536-50000)
SETB TR1
SETB ET1
SETB EA
MOV A,#0FEH
MOV P1,A
MOV R2,#5
SJMP $
T1ISR:
CLR TR1
MOV TH1,#HIGH(65536-50000)
MOV TL1,#LOW(65536-50000)
SETB TR1
DJNZ R2,T1E
MOV R2,#5
RL A
MOV P1,A
T1E:
RETI
END
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