閮ㄥ垎涔犻鍙傝�冪瓟妗?/p>
1.5
涓嬪垪鍚勬暟鍧囦负鍗佽繘鍒舵暟锛?/p>
璇烽噰鐢?/p>
8
浣嶄簩杩涘埗琛ョ爜杩愮畻锛?/p>
骞跺洖绛旀爣蹇楀瘎
瀛樺櫒
FLAGS
涓?/p>
CF
鍜?/p>
OF
鐨勫�硷紝
杩愮畻缁撴灉鎵�浠ｈ〃鐨勫崄杩涘埗鏁版槸澶氬皯锛熷
鏋滅敤
16
浣嶄簩杩涘埗琛ョ爜杩愮畻锛?/p>
鍏剁粨鏋滄墍浠ｈ〃鐨勫崄杩涘埗鏁版槸澶氬皯锛?/p>
FLAGS
涓?/p>
CF
鍜?/p>
OF
鐨勫�煎憿锛?/p>
(1)85+69 (2)85+(-69) (3)85-(-69) (4)85-(69)
85=55H,69=45H,-69=BBH
锛?/p>
8
浣嶄簩杩涘埗琛ョ爜杩愮畻
:
(1)85+69 =55H+45H=9AH, CF=0,OF=1
(2)85+(-69)=55H+BBH=110H,CF=1,OF=0
鍏朵綑鐣?/p>
1.6
瀹炴ā
寮?/p>
涓嬶紝
鍐?/p>
鍑烘
鍦?/p>
鍧�
鍜屽亸
绉?/p>
鍦板潃
涓?/p>
1234:2002
銆?/p>
1430:0042
銆?
FF00:0FFF
鐨勭墿鐞嗗湴鍧�銆?/p>
1234:2002=12340+2002=14342
1430:0042=14300+0042=14342
FF00:0FFF=FF000+0FFF=FFFFF
1.7
宸茬煡
8086
绯荤粺鏌愬瓨鍌ㄥ崟鍏冪墿鐞嗗湴鍧�涓猴細
52506H
锛屼綘璁や负娈靛熀鍧�鐨勬渶
澶у�笺�佹渶灏忓�煎垎鍒槸澶氬皯
? 8086
寰満鏈�澶氬彲浠ユ湁澶氬皯涓笉鍚岀殑娈靛熀
鍧�
?
52506=5250:0006,
娈靛熀鍧�鐨勬渶澶у�?/p>
=5250
52506=4251:FFF6,
娈靛熀鍧�鐨勬渶灏忓�?/p>
=4251
1.8
浠庣墿鐞嗗湴鍧�涓?/p>
00100H
寮�濮嬪埌
00103H
鍗曞厓涓『搴忓瓨鏀剧殑鏁版嵁涓猴細
12H
锛?
34H
锛?/p>
56H
锛?/p>
78H
銆傝鐢诲嚭鏁版嵁瀛樻斁绀烘剰鍥撅紝骞跺洖绛斾互涓嬮棶棰橈細
(1)
鍐欏嚭
00101H
瀛楄妭鍗曞厓鐨勫唴瀹?/p>
(00101)= 34H
(2)
鍐欏嚭
00102H
瀛楀崟鍏冪殑鍐呭
(00102)= 7856H
涔犻
3
3.1
鍒嗗埆璇存槑
8086
澶勭悊鍣ㄤ腑鍚勫瘎瀛樺櫒鐨勫悕绉板拰浣滅敤鏄粈涔?/p>
锛?/p>
3.2
婧㈠嚭鏍囧織
OF
涓庤繘浣嶆爣蹇?/p>
CF
鏈変綍浣滅敤鍜屽尯鍒紵
3.3
浣曚负娈靛湴鍧�锛熶綍涓烘湁鏁堝湴鍧�锛?/p>
浣曚负鐗╃悊鍦板潃锛熺敤鎸囦护涓句緥璇存槑銆?/p>
3.4
甯︾鍙锋暟姣旇緝澶у皬
,
褰?/p>
AX
<
BX
鏃剁▼搴忚浆鍚戞爣鍙?/p>
L1,
鑻ュ墠瀵兼寚浠や负
CMP
AX,
BX
鍚庣画鎸囦护搴斾负浠�涔堬紵鑻ヨ涓轰簩涓棤绗﹀彿鏁版瘮杈冨ぇ灏?/p>
,
鍚庣画鎸囦护搴斾负浠�
涔堬紵
甯︾鍙锋暟
:JL L1,
鏃犵鍙锋暟
:JB L1
3.5
ADD
鎸囦护鍜?/p>
ADC
鎸囦护鍦ㄤ粈涔堟儏鍐典笅鏄竴鏍风殑缁撴灉锛?/p>
CF=0
3.6
璇村嚭
CALL
鎸囦护鍜?/p>
INT 21H
鎸囦护鐨勬搷浣滐紝鏈変綍寮傚悓锛?/p>
CALL
鎶婃柇鐐瑰帇鍏ュ爢鏍堬紝涓嶄竴瀹氭槸杩滆皟锛?/p>
INT
21H
杩樿鎶?/p>
FLAGS
鍘嬪叆鍫嗘爤锛?/p>
涓旀槸杩滆皟锛屾�诲叆鍙ｅ湴鍧�涓?/p>
84H
鍐呭瓨涓殑涓や釜瀛椼�?/p>