ORG 8000H
AJMP MAIN
ORG 800BH
AJMP TOS
MAIN:MOV SP,#6FH
MOV TMOD,#01h
MOV TH0,#3CH
MOV TL0,#0B0H
MOV IE,#82H
MOV R2,#00H
SETB P1.7
SETB P1.0
SETB TR0
LOOP:SJMP LOOP
TOS: INC R2
CJNE R2,#14H,NEXT
CLR P1.0
CPL P1.7
MOV R2,#00h
NEXT:MOV TH0,#3CH
MOV TL0,#0B0H
RETI
END