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MOV DPTR,#DATA_TABLE
MOVC A,@A+DPTR
CPL A
MOV P0,A
INC COUNTER
MOV A,COUNTER
CJNE A,#04H,$1
MOV COUNTER,#00H
$1:
RETI C0H,F9H,A4H,B0H
DATA_TABLE: 99H,92H,82H,F8H
DB 80H,90H,88H,83H
DB C6H,A1H,86H,8EH
DB
DB
END

 學習心得：