ITOE:
MOV A,40H ;40HéA
CJNE A,41H,ITOE1;ä¸41Hæ¯è¾
ITOE1:
JC ITOE2 ;å¦æ40H<41H转ITOE2
MOV A,41H ;å°å¼éA
MOV B,40H ;大å¼éB
SJMP ITOE3 ;
ITOE2:
MOV A,40H ;å°å¼éA
MOV B,41H ;大å¼éB
ITOE3:
MOV DPTR,#2000H ;2000HéDPTR
MOVX A,@DPTR ;å°å°å¼é该å°å
XCH A,B ;大å°å¼äº¤æ¢
INC DPTR ;æ°æ®æéå 1
MOVX A,@DPTR ;å°å¤§å¼é该å°å
RET
追é®æé«æ¬èµï¼è½æå¾çä¸é£æ ·åå
CLRï¼C
SUBBï¼Aï¼41H
â¦
æç°å¨éè¦é£æ ·ç
追çDATCHG:
MOV A,40H ;å°40Hå¼éA
CLR C ;æ¸
è¿ä½
SUBB A,41H ;å41H
JC X1 ;å°äº0转X1
MOV A,40H ;40HéA
MOV 40H,41H ;41Hé40H
MOV 41H,A ;Aé40H
X1:
MOV DPTR,#2000H ;2000Héæ°æ®æé
MOV A,40H ;å°å¼éA
MOVX @DPTR,A ;éå
¥2000H
X2:
MOV DPTR,#2001H ;2001Héæ°æ®æé
MOV A,41H ;大å¼éA
MOVX @DPTR,A ;éå
¥2001H
RET