微机原理问题，求解答 在线等求解答，微机原理问题！
\u5173\u4e8e\u5fae\u673a\u539f\u7406\u7684\u95ee\u9898 \u6c42\u89e3\u7b548086\u6655\u6b7b\uff0c\u4e0d\u77e5\u9053\u73b0\u5728\u5927\u5b66\u751f\u53ea\u5b66\u8fd9\u4e2a\u51fa\u6765\u6709\u4ec0\u4e48\u7528\uff0c\u5b66\u57fa\u7840\u6ca1\u9519\uff0c\u53ea\u5b66\u57fa\u7840\u9519\u548c\u6ca1\u8fb9\u4e86\u3002
\u4e0d\u662f\u592a\u61c2\u3002
MOV DX, PORT1
IN AL, DX
MOV CX, DELAYTIME ; \u8bbe\u5b9a\u5faa\u73af\u6b21\u6570
CHKS: MOV DX, PORT2 ; \u7aef\u53e32\u5730\u5740\u9001\u81f3DX
IN AL, DX ; \u4ece\u7aef\u53e32\u8bfb\u51658\u4f4d\u6570\u636e\u81f3AL
AND AL, 1 ; \u63d0\u53d6AL\u7684\u6700\u4f4e\u4f4d
JZ DATIN ; \u82e5\u7aef\u53e32\u6700\u4f4e\u4f4d\u4e3a0\uff0c\u8f6c\u5165\u53e3\u4e3aDATI\u7684\u7a0b\u5e8f\u6bb5\u6267\u884c
LOOP CHKS ; \u82e5\u7aef\u53e32\u6700\u4f4e\u4f4d\u975e0\uff0c\u5faa\u73af\u68c0\u6d4b\u7aef\u53e32\u72b6\u6001
DATIN: MOV DX,PORT1 ; \u7aef\u53e31\u5730\u5740\u9001\u81f3DX
IN AL, DX ; \u4ece\u7aef\u53e31\u8bfb\u51658\u4f4d\u6570\u636e\u81f3AL
JMP CHEKS ; \u8f6c\u5165\u53e3\u4e3aCHKS\u7684\u7a0b\u5e8f\u6bb5\u7ee7\u7eed\u8fd0\u884c
.
\u6574\u6bb5\u7a0b\u5e8f\u529f\u80fd\u662f\uff1a\u7528\u67e5\u8be2(\u7aef\u53e32)\u65b9\u5f0f\uff0c\u4ece\u7aef\u53e31\u8f93\u5165\u6570\u636e\u3002
程序执行前，(2000H)=09H, (2001H)=03H
MOV CL，4 ;CL=4
MOV AX, [2000H] ;AX =0309H
SHL AL, CL ;AL内容逻辑左移4位，AX=0390H
SHR AX, CL ;AX内容逻辑右移4位，AX=0039H
MOV [2000H], AX ; [2000H]=39H, [2001H]=00H
程序执行后，(2000H)=39H, (2001H)=00H
.
第五-2题，题目显示不完整，暂不解答。
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