ORG 0000H
AJMP START
ORG 0030H // 这个是做什么的?上面AJMP START:后不就隔过去了??????
MOV R2,#10
MOV R3,#0
MOV DPTR,#TAB
NEXT:MOV A,R3
MOVC A,@A+DPTR
MOV P0,A
INC R3
ACALL DELAY
DJNZ R2,NEXT
AJMP START
DELAY:
MOV R7,#0FH
L1:MOV R6,#0FH
L2:MOV R5,#0FFH
DJNZ R5,$ // $什么意思?????
DJNZ R6,L2
DJNZ R7,L1
RET // ret 做什么的???
TAB:DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H
END