ORG 0000H
LJMP main
ORG 0100H
main: mov R7,#0FEH
loop: mov p1,R7
MOV R0, #20
DLY1:
MOV R1, #70
DLY2:
MOV R2, #80
DJNZ R2, $
DJNZ R1, DLY2
DJNZ R0, DLY1
MOV A,R7
RL A
MOV R7,A
SJMP LOOP
END
ORG 0000H
LJMP main
ORG 0100H
main: mov R7,#0FEH
loop: mov p1,R7
MOV R0, #20
DLY1:
MOV R1, #70
DLY2:
MOV R2, #80
DJNZ R2, $
DJNZ R1, DLY2
DJNZ R0, DLY1
MOV A,R7
RL A
MOV R7,A
SJMP LOOP
END
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