ebp\u548cesp\u662f32\u4f4d\u7684SP\uff0cBP
\nesp\u662f\u5806\u6808\u6307\u9488
\nebp\u662f\u57fa\u5740\u6307\u9488
\nESP\u4e0eSP\u7684\u5173\u7cfb\u5c31\u8c61AX\u4e0eAL\uff0cAH\u7684\u5173\u7cfb.
\n32\u4f4dCPU\u6240\u542b\u6709\u7684\u5bc4\u5b58\u5668\u6709\uff1a
\n4\u4e2a\u6570\u636e\u5bc4\u5b58\u5668(EAX\u3001EBX\u3001ECX\u548cEDX)
\n2\u4e2a\u53d8\u5740\u548c\u6307\u9488\u5bc4\u5b58\u5668(ESI\u548cEDI) 2\u4e2a\u6307\u9488\u5bc4\u5b58\u5668(ESP\u548cEBP)
\n6\u4e2a\u6bb5\u5bc4\u5b58\u5668(ES\u3001CS\u3001SS\u3001DS\u3001FS\u548cGS)
\n1\u4e2a\u6307\u4ee4\u6307\u9488\u5bc4\u5b58\u5668(EIP) 1\u4e2a\u6807\u5fd7\u5bc4\u5b58\u5668(EFlags) <\/p>\n
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\n32\u4f4dCPU\u67094\u4e2a32\u4f4d\u7684\u901a\u7528\u5bc4\u5b58\u5668EAX\u3001EBX\u3001ECX\u548cEDX\u3002\u5bf9\u4f4e16\u4f4d\u6570\u636e\u7684\u5b58\u53d6\uff0c\u4e0d\u4f1a\u5f71\u54cd\u9ad816\u4f4d\u7684\u6570\u636e\u3002\u8fd9\u4e9b
\n\u4f4e16\u4f4d\u5bc4\u5b58\u5668\u5206\u522b\u547d\u540d\u4e3a\uff1aAX\u3001BX\u3001CX\u548cDX\uff0c\u5b83\u548c\u5148\u524d\u7684CPU\u4e2d\u7684\u5bc4\u5b58\u5668\u76f8\u4e00\u81f4\u3002
\n4\u4e2a16\u4f4d\u5bc4\u5b58\u5668\u53c8\u53ef\u5206\u5272\u62108\u4e2a\u72ec\u7acb\u76848\u4f4d\u5bc4\u5b58\u5668(AX\uff1aAH-AL\u3001BX\uff1aBH-BL\u3001CX\uff1aCH-CL\u3001DX\uff1aDH-DL)\uff0c\u6bcf\u4e2a\u5bc4
\n\u5b58\u5668\u90fd\u6709\u81ea\u5df1\u7684\u540d\u79f0\uff0c\u53ef\u72ec\u7acb\u5b58\u53d6\u3002\u7a0b\u5e8f<\/span>\u5458\u53ef\u5229\u7528\u6570\u636e\u5bc4\u5b58\u5668\u7684\u8fd9\u79cd\u201c\u53ef\u5206\u53ef\u5408\u201d\u7684\u7279\u6027\uff0c\u7075\u6d3b\u5730\u5904\u7406\u5b57\/\u5b57
\n\u8282\u7684\u4fe1\u606f\u3002
\n\u5bc4\u5b58\u5668AX\u548cAL\u901a\u5e38\u79f0\u4e3a\u7d2f\u52a0\u5668(Accumulator)\uff0c\u7528\u7d2f\u52a0\u5668\u8fdb\u884c\u7684\u64cd\u4f5c\u53ef\u80fd\u9700\u8981\u66f4\u5c11\u65f6\u95f4\u3002\u7d2f\u52a0\u5668\u53ef\u7528\u4e8e\u4e58\u3001
\n\u9664\u3001\u8f93\u5165\/\u8f93\u51fa\u7b49\u64cd\u4f5c\uff0c\u5b83\u4eec\u7684\u4f7f\u7528\u9891\u7387\u5f88\u9ad8\uff1b
\n\u5bc4\u5b58\u5668BX\u79f0\u4e3a\u57fa\u5730\u5740\u5bc4\u5b58\u5668(Base Register)\u3002\u5b83\u53ef\u4f5c\u4e3a\u5b58\u50a8\u5668\u6307\u9488\u6765\u4f7f\u7528\uff1b
\n\u5bc4\u5b58\u5668CX\u79f0\u4e3a\u8ba1\u6570\u5bc4\u5b58\u5668(Count Register)\u3002\u5728\u5faa\u73af\u548c\u5b57\u7b26\u4e32\u64cd\u4f5c\u65f6\uff0c\u8981\u7528\u5b83\u6765\u63a7\u5236\u5faa\u73af\u6b21\u6570\uff1b\u5728\u4f4d\u64cd\u4f5c
\n\u4e2d\uff0c\u5f53\u79fb\u591a\u4f4d\u65f6\uff0c\u8981\u7528CL\u6765\u6307\u660e\u79fb\u4f4d\u7684\u4f4d\u6570\uff1b
\n\u5bc4\u5b58\u5668DX\u79f0\u4e3a\u6570\u636e\u5bc4\u5b58\u5668(Data Register)\u3002\u5728\u8fdb\u884c\u4e58\u3001\u9664\u8fd0\u7b97\u65f6\uff0c\u5b83\u53ef\u4f5c\u4e3a\u9ed8\u8ba4\u7684\u64cd\u4f5c\u6570\u53c2\u4e0e\u8fd0\u7b97\uff0c\u4e5f
\n\u53ef\u7528\u4e8e\u5b58\u653eI\/O\u7684\u7aef\u53e3\u5730\u5740\u3002
\n\u572816\u4f4dCPU\u4e2d\uff0cAX\u3001BX\u3001CX\u548cDX\u4e0d\u80fd\u4f5c\u4e3a\u57fa\u5740\u548c\u53d8\u5740\u5bc4\u5b58\u5668\u6765\u5b58\u653e\u5b58\u50a8\u5355\u5143\u7684\u5730\u5740\uff0c\u4f46\u572832\u4f4dCPU\u4e2d\uff0c\u517632\u4f4d
\n\u5bc4\u5b58\u5668EAX\u3001EBX\u3001ECX\u548cEDX\u4e0d\u4ec5\u53ef\u4f20\u9001\u6570\u636e\u3001\u6682\u5b58\u6570\u636e\u4fdd\u5b58\u7b97\u672f\u903b\u8f91\u8fd0\u7b97\u7ed3\u679c\uff0c\u800c\u4e14\u4e5f\u53ef\u4f5c\u4e3a\u6307\u9488\u5bc4\u5b58\u5668\uff0c
\n\u6240\u4ee5\uff0c\u8fd9\u4e9b32\u4f4d\u5bc4\u5b58\u5668\u66f4\u5177\u6709\u901a\u7528\u6027\u3002<\/p>\n
\n2\u3001\u53d8\u5740\u5bc4\u5b58\u5668
\n32\u4f4dCPU\u67092\u4e2a32\u4f4d\u901a\u7528\u5bc4\u5b58\u5668ESI\u548cEDI\u3002\u5176\u4f4e16\u4f4d\u5bf9\u5e94\u5148\u524dCPU\u4e2d\u7684SI\u548cDI\uff0c\u5bf9\u4f4e16\u4f4d\u6570\u636e\u7684\u5b58\u53d6\uff0c\u4e0d\u5f71\u54cd
\n\u9ad816\u4f4d\u7684\u6570\u636e\u3002
\n\u5bc4\u5b58\u5668ESI\u3001EDI\u3001SI\u548cDI\u79f0\u4e3a\u53d8\u5740\u5bc4\u5b58\u5668(Index Register)\uff0c\u5b83\u4eec\u4e3b\u8981\u7528\u4e8e\u5b58\u653e\u5b58\u50a8\u5355\u5143\u5728\u6bb5\u5185\u7684\u504f\u79fb\u91cf\uff0c
\n\u7528\u5b83\u4eec\u53ef\u5b9e\u73b0\u591a\u79cd\u5b58\u50a8\u5668\u64cd\u4f5c\u6570\u7684\u5bfb\u5740\u65b9\u5f0f\uff0c\u4e3a\u4ee5\u4e0d\u540c\u7684\u5730\u5740\u5f62\u5f0f\u8bbf\u95ee\u5b58\u50a8\u5355\u5143\u63d0\u4f9b\u65b9\u4fbf\u3002
\n\u53d8\u5740\u5bc4\u5b58\u5668\u4e0d\u53ef\u5206\u5272\u62108\u4f4d\u5bc4\u5b58\u5668\u3002\u4f5c\u4e3a\u901a\u7528\u5bc4\u5b58\u5668\uff0c\u4e5f\u53ef\u5b58\u50a8\u7b97\u672f\u903b\u8f91\u8fd0\u7b97\u7684\u64cd\u4f5c\u6570\u548c\u8fd0\u7b97\u7ed3\u679c\u3002
\n\u5b83\u4eec\u53ef\u4f5c\u4e00\u822c\u7684\u5b58\u50a8\u5668\u6307\u9488\u4f7f\u7528\u3002\u5728\u5b57\u7b26\u4e32\u64cd\u4f5c\u6307\u4ee4\u7684\u6267\u884c\u8fc7\u7a0b\u4e2d\uff0c\u5bf9\u5b83\u4eec\u6709\u7279\u5b9a\u7684\u8981\u6c42\uff0c\u800c\u4e14\u8fd8\u5177\u6709\u7279
\n\u6b8a\u7684\u529f\u80fd<\/span>\u3002 <\/p>\n
\n32\u4f4dCPU\u67092\u4e2a32\u4f4d\u901a\u7528\u5bc4\u5b58\u5668EBP\u548cESP\u3002\u5176\u4f4e16\u4f4d\u5bf9\u5e94\u5148\u524dCPU\u4e2d\u7684SBP\u548cSP\uff0c\u5bf9\u4f4e16\u4f4d\u6570\u636e\u7684\u5b58\u53d6\uff0c\u4e0d\u5f71
\n\u54cd\u9ad816\u4f4d\u7684\u6570\u636e\u3002
\n\u5bc4\u5b58\u5668EBP\u3001ESP\u3001BP\u548cSP\u79f0\u4e3a\u6307\u9488\u5bc4\u5b58\u5668(Pointer Register)\uff0c\u4e3b\u8981\u7528\u4e8e\u5b58\u653e\u5806\u6808\u5185\u5b58<\/span>\u50a8\u5355\u5143\u7684\u504f\u79fb\u91cf\uff0c
\n\u7528\u5b83\u4eec\u53ef\u5b9e\u73b0\u591a\u79cd\u5b58\u50a8\u5668\u64cd\u4f5c\u6570\u7684\u5bfb\u5740\u65b9\u5f0f\uff0c\u4e3a\u4ee5\u4e0d\u540c\u7684\u5730\u5740\u5f62\u5f0f\u8bbf\u95ee\u5b58\u50a8\u5355\u5143\u63d0\u4f9b\u65b9\u4fbf\u3002
\n\u6307\u9488\u5bc4\u5b58\u5668\u4e0d\u53ef\u5206\u5272\u62108\u4f4d\u5bc4\u5b58\u5668\u3002\u4f5c\u4e3a\u901a\u7528\u5bc4\u5b58\u5668\uff0c\u4e5f\u53ef\u5b58\u50a8\u7b97\u672f\u903b\u8f91\u8fd0\u7b97\u7684\u64cd\u4f5c\u6570\u548c\u8fd0\u7b97\u7ed3\u679c\u3002
\n\u5b83\u4eec\u4e3b\u8981\u7528\u4e8e\u8bbf\u95ee\u5806\u6808\u5185\u7684\u5b58\u50a8\u5355\u5143\uff0c\u5e76\u4e14\u89c4\u5b9a\uff1a
\nBP\u4e3a\u57fa\u6307\u9488(Base Pointer)\u5bc4\u5b58\u5668\uff0c\u7528\u5b83\u53ef\u76f4\u63a5\u5b58\u53d6\u5806\u6808\u4e2d\u7684\u6570\u636e\uff1b
\nSP\u4e3a\u5806\u6808\u6307\u9488(Stack Pointer)\u5bc4\u5b58\u5668\uff0c\u7528\u5b83\u53ea\u53ef\u8bbf\u95ee\u6808\u9876\u3002 <\/p>\n
\n\u6bb5\u5bc4\u5b58\u5668\u662f\u6839\u636e\u5185\u5b58\u5206\u6bb5\u7684\u7ba1\u7406\u6a21\u5f0f\u800c\u8bbe\u7f6e<\/span>\u7684\u3002\u5185\u5b58\u5355\u5143\u7684\u7269\u7406\u5730\u5740\u7531\u6bb5\u5bc4\u5b58\u5668\u7684\u503c\u548c\u4e00\u4e2a\u504f\u79fb\u91cf\u7ec4\u5408\u800c\u6210
\n\u7684\uff0c\u8fd9\u6837\u53ef\u7528\u4e24\u4e2a\u8f83\u5c11\u4f4d\u6570\u7684\u503c\u7ec4\u5408\u6210\u4e00\u4e2a\u53ef\u8bbf\u95ee\u8f83\u5927\u7269\u7406\u7a7a\u95f4\u7684\u5185\u5b58\u5730\u5740\u3002
\nCPU\u5185\u90e8\u7684\u6bb5\u5bc4\u5b58\u5668\uff1a
\nCS\u2014\u2014\u4ee3\u7801\u6bb5\u5bc4\u5b58\u5668(Code Segment Register)\uff0c\u5176\u503c\u4e3a\u4ee3\u7801\u6bb5\u7684\u6bb5\u503c\uff1b
\nDS\u2014\u2014\u6570\u636e\u6bb5\u5bc4\u5b58\u5668(Data Segment Register)\uff0c\u5176\u503c\u4e3a\u6570\u636e\u6bb5\u7684\u6bb5\u503c\uff1b
\nES\u2014\u2014\u9644\u52a0\u6bb5\u5bc4\u5b58\u5668(Extra Segment Register)\uff0c\u5176\u503c\u4e3a\u9644\u52a0\u6570\u636e\u6bb5\u7684\u6bb5\u503c\uff1b
\nSS\u2014\u2014\u5806\u6808\u6bb5\u5bc4\u5b58\u5668(Stack Segment Register)\uff0c\u5176\u503c\u4e3a\u5806\u6808\u6bb5\u7684\u6bb5\u503c\uff1b
\nFS\u2014\u2014\u9644\u52a0\u6bb5\u5bc4\u5b58\u5668(Extra Segment Register)\uff0c\u5176\u503c\u4e3a\u9644\u52a0\u6570\u636e\u6bb5\u7684\u6bb5\u503c\uff1b
\nGS\u2014\u2014\u9644\u52a0\u6bb5\u5bc4\u5b58\u5668(Extra Segment Register)\uff0c\u5176\u503c\u4e3a\u9644\u52a0\u6570\u636e\u6bb5\u7684\u6bb5\u503c\u3002
\n\u572816\u4f4dCPU\u7cfb\u7edf<\/span>\u4e2d\uff0c\u5b83\u53ea\u67094\u4e2a\u6bb5\u5bc4\u5b58\u5668\uff0c\u6240\u4ee5\uff0c\u7a0b\u5e8f\u5728\u4efb\u4f55\u65f6\u523b\u81f3\u591a\u67094\u4e2a\u6b63\u5728\u4f7f\u7528\u7684\u6bb5\u53ef\u76f4\u63a5\u8bbf\u95ee\uff1b\u572832\u4f4d
\n\u5fae\u673a\u7cfb\u7edf\u4e2d\uff0c\u5b83\u67096\u4e2a\u6bb5\u5bc4\u5b58\u5668\uff0c\u6240\u4ee5\uff0c\u5728\u6b64\u73af\u5883\u4e0b\u5f00\u53d1<\/span>\u7684\u7a0b\u5e8f\u6700\u591a\u53ef\u540c\u65f6\u8bbf\u95ee6\u4e2a\u6bb5\u3002
\n32\u4f4dCPU\u6709\u4e24\u4e2a\u4e0d\u540c\u7684\u5de5\u4f5c\u65b9\u5f0f\uff1a\u5b9e\u65b9\u5f0f\u548c\u4fdd\u62a4\u65b9\u5f0f\u3002\u5728\u6bcf\u79cd\u65b9\u5f0f\u4e0b\uff0c\u6bb5\u5bc4\u5b58\u5668\u7684\u4f5c\u7528\u662f\u4e0d\u540c\u7684\u3002\u6709\u5173\u89c4\u5b9a\u7b80
\n\u5355\u63cf\u8ff0\u5982\u4e0b\uff1a
\n\u5b9e\u65b9\u5f0f\uff1a \u524d4\u4e2a\u6bb5\u5bc4\u5b58\u5668CS\u3001DS\u3001ES\u548cSS\u4e0e\u5148\u524dCPU\u4e2d\u7684\u6240\u5bf9\u5e94\u7684\u6bb5\u5bc4\u5b58\u5668\u7684\u542b\u4e49\u5b8c\u5168\u4e00\u81f4\uff0c\u5185\u5b58\u5355\u5143\u7684\u903b\u8f91
\n\u5730\u5740\u4ecd\u4e3a\u201c\u6bb5\u503c\uff1a\u504f\u79fb\u91cf\u201d\u7684\u5f62\u5f0f\u3002\u4e3a\u8bbf\u95ee\u67d0\u5185\u5b58\u6bb5\u5185\u7684\u6570\u636e\uff0c\u5fc5\u987b\u4f7f\u7528\u8be5\u6bb5\u5bc4\u5b58\u5668\u548c\u5b58\u50a8\u5355\u5143\u7684\u504f\u79fb\u91cf\u3002
\n\u4fdd\u62a4\u65b9\u5f0f\uff1a \u5728\u6b64\u65b9\u5f0f\u4e0b\uff0c\u60c5\u51b5\u8981\u590d\u6742\u5f97\u591a\uff0c\u88c5\u5165\u6bb5\u5bc4\u5b58\u5668\u7684\u4e0d\u518d\u662f\u6bb5\u503c\uff0c\u800c\u662f\u79f0\u4e3a\u201c\u9009\u62e9\u5b50\u201d(Selector)\u7684\u67d0\u4e2a\u503c\u3002\u3002 <\/p>\n
\n32\u4f4dCPU\u628a\u6307\u4ee4\u6307\u9488\u6269\u5c55\u523032\u4f4d\uff0c\u5e76\u8bb0\u4f5cEIP\uff0cEIP\u7684\u4f4e16\u4f4d\u4e0e\u5148\u524dCPU\u4e2d\u7684IP\u4f5c\u7528\u76f8\u540c\u3002
\n\u6307\u4ee4\u6307\u9488EIP\u3001IP(Instruction Pointer)\u662f\u5b58\u653e\u4e0b\u6b21\u5c06\u8981\u6267\u884c\u7684\u6307\u4ee4\u5728\u4ee3\u7801\u6bb5\u7684\u504f\u79fb\u91cf\u3002\u5728\u5177\u6709\u9884\u53d6\u6307\u4ee4\u529f
\n\u80fd\u7684\u7cfb\u7edf\u4e2d\uff0c\u4e0b\u6b21\u8981\u6267\u884c\u7684\u6307\u4ee4\u901a\u5e38\u5df2\u88ab\u9884\u53d6\u5230\u6307\u4ee4\u961f\u5217\u4e2d\uff0c\u9664\u975e\u53d1\u751f\u8f6c\u79fb\u60c5\u51b5\u3002\u6240\u4ee5\uff0c\u5728\u7406\u89e3\u5b83\u4eec\u7684\u529f\u80fd
\n\u65f6\uff0c\u4e0d\u8003\u8651\u5b58\u5728\u6307\u4ee4\u961f\u5217\u7684\u60c5\u51b5\u3002
\n\u5728\u5b9e\u65b9\u5f0f\u4e0b\uff0c\u7531\u4e8e\u6bcf\u4e2a\u6bb5\u7684\u6700\u5927\u8303\u56f4\u4e3a64K\uff0c\u6240\u4ee5\uff0cEIP\u4e2d\u7684\u9ad816\u4f4d\u80af\u5b9a\u90fd\u4e3a0\uff0c\u6b64\u65f6\uff0c\u76f8\u5f53\u4e8e\u53ea\u7528\u5176\u4f4e16\u4f4d
\n\u7684IP\u6765\u53cd\u6620\u7a0b\u5e8f\u4e2d\u6307\u4ee4\u7684\u6267\u884c\u6b21\u5e8f\u3002 <\/p>\n
\n\u4e00\u3001\u8fd0\u7b97\u7ed3\u679c\u6807\u5fd7\u4f4d
\n 1\u3001\u8fdb\u4f4d\u6807\u5fd7CF(Carry Flag)
\n\u8fdb\u4f4d\u6807\u5fd7CF\u4e3b\u8981\u7528\u6765\u53cd\u6620\u8fd0\u7b97\u662f\u5426\u4ea7\u751f\u8fdb\u4f4d\u6216\u501f\u4f4d\u3002\u5982\u679c\u8fd0\u7b97\u7ed3\u679c\u7684\u6700\u9ad8\u4f4d\u4ea7\u751f\u4e86\u4e00\u4e2a\u8fdb\u4f4d\u6216\u501f\u4f4d\uff0c\u90a3\u4e48\uff0c\u5176\u503c\u4e3a1\uff0c\u5426\u5219\u5176\u503c\u4e3a0\u3002
\n\u4f7f\u7528\u8be5\u6807\u5fd7\u4f4d\u7684\u60c5\u51b5\u6709\uff1a\u591a\u5b57(\u5b57\u8282)\u6570\u7684\u52a0\u51cf\u8fd0\u7b97\uff0c\u65e0\u7b26\u53f7\u6570\u7684\u5927\u5c0f\u6bd4\u8f83\u8fd0\u7b97\uff0c\u79fb\u4f4d\u64cd\u4f5c\uff0c\u5b57(\u5b57\u8282)\u4e4b\u95f4\u79fb\u4f4d\uff0c\u4e13\u95e8\u6539\u53d8CF\u503c\u7684\u6307\u4ee4\u7b49\u3002
\n 2\u3001\u5947\u5076\u6807\u5fd7PF(Parity Flag)
\n\u5947\u5076\u6807\u5fd7PF\u7528\u4e8e\u53cd\u6620\u8fd0\u7b97\u7ed3\u679c\u4e2d\u201c1\u201d\u7684\u4e2a\u6570\u7684\u5947\u5076\u6027\u3002\u5982\u679c\u201c1\u201d\u7684\u4e2a\u6570\u4e3a\u5076\u6570\uff0c\u5219PF\u7684\u503c\u4e3a1\uff0c\u5426\u5219\u5176\u503c\u4e3a0\u3002
\n\u5229\u7528PF\u53ef\u8fdb\u884c\u5947\u5076\u6821\u9a8c\u68c0\u67e5\uff0c\u6216\u4ea7\u751f\u5947\u5076\u6821\u9a8c\u4f4d\u3002\u5728\u6570\u636e\u4f20\u9001\u8fc7\u7a0b\u4e2d\uff0c\u4e3a\u4e86\u63d0\u4f9b\u4f20\u9001\u7684\u53ef\u9760\u6027\uff0c\u5982\u679c\u91c7\u7528\u5947\u5076\u6821\u9a8c\u7684\u65b9\u6cd5\uff0c\u5c31\u53ef\u4f7f\u7528\u8be5\u6807\u5fd7\u4f4d\u3002
\n 3\u3001\u8f85\u52a9\u8fdb\u4f4d\u6807\u5fd7AF(Auxiliary Carry Flag)
\n\u5728\u53d1\u751f\u4e0b\u5217\u60c5\u51b5\u65f6\uff0c\u8f85\u52a9\u8fdb\u4f4d\u6807\u5fd7AF\u7684\u503c\u88ab\u7f6e\u4e3a1\uff0c\u5426\u5219\u5176\u503c\u4e3a0\uff1a
\n(1)\u3001\u5728\u5b57\u64cd\u4f5c\u65f6\uff0c\u53d1\u751f\u4f4e\u5b57\u8282\u5411\u9ad8\u5b57\u8282\u8fdb\u4f4d\u6216\u501f\u4f4d\u65f6\uff1b
\n(2)\u3001\u5728\u5b57\u8282\u64cd\u4f5c\u65f6\uff0c\u53d1\u751f\u4f4e4\u4f4d\u5411\u9ad84\u4f4d\u8fdb\u4f4d\u6216\u501f\u4f4d\u65f6\u3002
\n\u5bf9\u4ee5\u4e0a6\u4e2a\u8fd0\u7b97\u7ed3\u679c\u6807\u5fd7\u4f4d\uff0c\u5728\u4e00\u822c\u7f16\u7a0b\u60c5\u51b5\u4e0b\uff0c\u6807\u5fd7\u4f4dCF\u3001ZF\u3001SF\u548cOF\u7684\u4f7f\u7528\u9891\u7387\u8f83\u9ad8\uff0c\u800c\u6807\u5fd7\u4f4dPF\u548cAF\u7684\u4f7f\u7528\u9891\u7387\u8f83\u4f4e\u3002
\n 4\u3001\u96f6\u6807\u5fd7ZF(Zero Flag)
\n\u96f6\u6807\u5fd7ZF\u7528\u6765\u53cd\u6620\u8fd0\u7b97\u7ed3\u679c\u662f\u5426\u4e3a0\u3002\u5982\u679c\u8fd0\u7b97\u7ed3\u679c\u4e3a0\uff0c\u5219\u5176\u503c\u4e3a1\uff0c\u5426\u5219\u5176\u503c\u4e3a0\u3002\u5728\u5224\u65ad\u8fd0\u7b97\u7ed3\u679c\u662f\u5426\u4e3a0\u65f6\uff0c\u53ef\u4f7f\u7528\u6b64\u6807\u5fd7\u4f4d\u3002
\n 5\u3001\u7b26\u53f7\u6807\u5fd7SF(Sign Flag)
\n\u7b26\u53f7\u6807\u5fd7SF\u7528\u6765\u53cd\u6620\u8fd0\u7b97\u7ed3\u679c\u7684\u7b26\u53f7\u4f4d\uff0c\u5b83\u4e0e\u8fd0\u7b97\u7ed3\u679c\u7684\u6700\u9ad8\u4f4d\u76f8\u540c\u3002\u5728\u5fae\u673a\u7cfb\u7edf\u4e2d\uff0c\u6709\u7b26\u53f7\u6570\u91c7\u7528\u8865\u7801\u8868\u793a\u6cd5\uff0c\u6240\u4ee5\uff0cSF\u4e5f\u5c31\u53cd\u6620\u8fd0\u7b97\u7ed3\u679c\u7684\u6b63\u8d1f\u53f7\u3002\u8fd0\u7b97\u7ed3\u679c\u4e3a\u6b63\u6570\u65f6\uff0cSF\u7684\u503c\u4e3a0\uff0c\u5426\u5219\u5176\u503c\u4e3a1\u3002
\n 6\u3001\u6ea2\u51fa\u6807\u5fd7OF(Overflow Flag)
\n\u6ea2\u51fa\u6807\u5fd7OF\u7528\u4e8e\u53cd\u6620\u6709\u7b26\u53f7\u6570\u52a0\u51cf\u8fd0\u7b97\u6240\u5f97\u7ed3\u679c\u662f\u5426\u6ea2\u51fa\u3002\u5982\u679c\u8fd0\u7b97\u7ed3\u679c\u8d85\u8fc7\u5f53\u524d\u8fd0\u7b97\u4f4d\u6570\u6240\u80fd\u8868\u793a\u7684\u8303\u56f4\uff0c\u5219\u79f0\u4e3a\u6ea2\u51fa\uff0cOF\u7684\u503c\u88ab\u7f6e\u4e3a1\uff0c\u5426\u5219\uff0cOF\u7684\u503c\u88ab\u6e05\u4e3a0\u3002
\n\u201c\u6ea2\u51fa\u201d\u548c\u201c\u8fdb\u4f4d\u201d\u662f\u4e24\u4e2a\u4e0d\u540c\u542b\u4e49\u7684\u6982\u5ff5\uff0c\u4e0d\u8981\u6df7\u6dc6\u3002\u5982\u679c\u4e0d\u592a\u6e05\u695a\u7684\u8bdd\uff0c\u8bf7\u67e5\u9605\u300a\u8ba1\u7b97\u673a\u7ec4\u6210\u539f\u7406\u300b\u8bfe\u7a0b\u4e2d\u7684\u6709\u5173\u7ae0\u8282\u3002 <\/p>\n
\n\u72b6\u6001\u63a7\u5236\u6807\u5fd7\u4f4d\u662f\u7528\u6765\u63a7\u5236CPU\u64cd\u4f5c\u7684\uff0c\u5b83\u4eec\u8981\u901a\u8fc7\u4e13\u95e8\u7684\u6307\u4ee4\u624d\u80fd\u4f7f\u4e4b\u53d1\u751f\u6539\u53d8\u3002
\n 1\u3001\u8ffd\u8e2a\u6807\u5fd7TF(Trap Flag)
\n\u5f53\u8ffd\u8e2a\u6807\u5fd7TF\u88ab\u7f6e\u4e3a1\u65f6\uff0cCPU\u8fdb\u5165\u5355\u6b65\u6267\u884c\u65b9\u5f0f\uff0c\u5373\u6bcf\u6267\u884c\u4e00\u6761\u6307\u4ee4\uff0c\u4ea7\u751f\u4e00\u4e2a\u5355\u6b65\u4e2d\u65ad\u8bf7\u6c42\u3002\u8fd9\u79cd\u65b9\u5f0f\u4e3b\u8981\u7528\u4e8e\u7a0b\u5e8f\u7684\u8c03\u8bd5<\/span>\u3002
\n\u6307\u4ee4\u7cfb\u7edf\u4e2d\u6ca1\u6709\u4e13\u95e8\u7684\u6307\u4ee4\u6765\u6539\u53d8\u6807\u5fd7\u4f4dTF\u7684\u503c\uff0c\u4f46\u7a0b\u5e8f\u5458\u53ef\u7528\u5176\u5b83\u529e\u6cd5\u6765\u6539\u53d8\u5176\u503c\u3002
\n 2\u3001\u4e2d\u65ad\u5141\u8bb8\u6807\u5fd7IF(Interrupt-enable Flag)
\n\u4e2d\u65ad\u5141\u8bb8\u6807\u5fd7IF\u662f\u7528\u6765\u51b3\u5b9aCPU\u662f\u5426\u54cd\u5e94CPU\u5916\u90e8\u7684\u53ef\u5c4f\u853d\u4e2d\u65ad\u53d1\u51fa\u7684\u4e2d\u65ad\u8bf7\u6c42\u3002\u4f46\u4e0d\u7ba1\u8be5\u6807\u5fd7\u4e3a\u4f55\u503c\uff0cCPU\u90fd\u5fc5\u987b\u54cd\u5e94CPU\u5916\u90e8\u7684\u4e0d\u53ef\u5c4f\u853d\u4e2d\u65ad\u6240\u53d1\u51fa\u7684\u4e2d\u65ad\u8bf7\u6c42\uff0c\u4ee5\u53caCPU\u5185\u90e8\u4ea7\u751f\u7684\u4e2d\u65ad\u8bf7\u6c42\u3002\u5177\u4f53\u89c4\u5b9a\u5982\u4e0b\uff1a
\n(1)\u3001\u5f53IF=1\u65f6\uff0cCPU\u53ef\u4ee5\u54cd\u5e94CPU\u5916\u90e8\u7684\u53ef\u5c4f\u853d\u4e2d\u65ad\u53d1\u51fa\u7684\u4e2d\u65ad\u8bf7\u6c42\uff1b
\n(2)\u3001\u5f53IF=0\u65f6\uff0cCPU\u4e0d\u54cd\u5e94CPU\u5916\u90e8\u7684\u53ef\u5c4f\u853d\u4e2d\u65ad\u53d1\u51fa\u7684\u4e2d\u65ad\u8bf7\u6c42\u3002
\nCPU\u7684\u6307\u4ee4\u7cfb\u7edf\u4e2d\u4e5f\u6709\u4e13\u95e8\u7684\u6307\u4ee4\u6765\u6539\u53d8\u6807\u5fd7\u4f4dIF\u7684\u503c\u3002
\n 3\u3001\u65b9\u5411\u6807\u5fd7DF(Direction Flag)
\n\u65b9\u5411\u6807\u5fd7DF\u7528\u6765\u51b3\u5b9a\u5728\u4e32\u64cd\u4f5c\u6307\u4ee4\u6267\u884c\u65f6\u6709\u5173\u6307\u9488\u5bc4\u5b58\u5668\u53d1\u751f\u8c03\u6574\u7684\u65b9\u5411\u3002\u5177\u4f53\u89c4\u5b9a\u5728\u7b2c5.2.11\u8282\u2014\u2014\u5b57\u7b26\u4e32\u64cd\u4f5c\u6307\u4ee4\u2014\u2014\u4e2d\u7ed9\u51fa\u3002\u5728\u5fae\u673a\u7684\u6307\u4ee4\u7cfb\u7edf\u4e2d\uff0c\u8fd8\u63d0\u4f9b\u4e86\u4e13\u95e8\u7684\u6307\u4ee4\u6765\u6539\u53d8\u6807\u5fd7\u4f4dDF\u7684\u503c\u3002 <\/p>\n
\n 1\u3001I\/O\u7279\u6743\u6807\u5fd7IOPL(I\/O Privilege Level)
\nI\/O\u7279\u6743\u6807\u5fd7\u7528\u4e24\u4f4d\u4e8c\u8fdb\u5236\u4f4d\u6765\u8868\u793a\uff0c\u4e5f\u79f0\u4e3aI\/O\u7279\u6743\u7ea7\u5b57\u6bb5\u3002\u8be5\u5b57\u6bb5\u6307\u5b9a\u4e86\u8981\u6c42\u6267\u884cI\/O\u6307\u4ee4\u7684\u7279\u6743\u7ea7\u3002\u5982\u679c\u5f53\u524d\u7684\u7279\u6743\u7ea7\u522b\u5728\u6570\u503c\u4e0a\u5c0f\u4e8e\u7b49\u4e8eIOPL\u7684\u503c\uff0c\u90a3\u4e48\uff0c\u8be5I\/O\u6307\u4ee4\u53ef\u6267\u884c\uff0c\u5426\u5219\u5c06\u53d1\u751f\u4e00\u4e2a\u4fdd\u62a4\u5f02\u5e38\u3002
\n 2\u3001\u5d4c\u5957\u4efb\u52a1\u6807\u5fd7NT(Nested Task)
\n\u5d4c\u5957\u4efb\u52a1\u6807\u5fd7NT\u7528\u6765\u63a7\u5236\u4e2d\u65ad\u8fd4\u56de\u6307\u4ee4IRET\u7684\u6267\u884c\u3002\u5177\u4f53\u89c4\u5b9a\u5982\u4e0b\uff1a
\n(1)\u3001\u5f53NT=0\uff0c\u7528\u5806\u6808\u4e2d\u4fdd\u5b58\u7684\u503c\u6062\u590dEFLAGS\u3001CS\u548cEIP\uff0c\u6267\u884c\u5e38\u89c4\u7684\u4e2d\u65ad\u8fd4\u56de\u64cd\u4f5c\uff1b
\n(2)\u3001\u5f53NT=1\uff0c\u901a\u8fc7\u4efb\u52a1\u8f6c\u6362\u5b9e\u73b0\u4e2d\u65ad\u8fd4\u56de\u3002
\n 3\u3001\u91cd\u542f\u52a8\u6807\u5fd7RF(Restart Flag)
\n\u91cd\u542f\u52a8\u6807\u5fd7RF\u7528\u6765\u63a7\u5236\u662f\u5426\u63a5\u53d7\u8c03\u8bd5\u6545\u969c\u3002\u89c4\u5b9a\uff1aRF=0\u65f6\uff0c\u8868\u793a\u201c\u63a5\u53d7\u201d\u8c03\u8bd5\u6545\u969c\uff0c\u5426\u5219\u62d2\u7edd\u4e4b\u3002\u5728\u6210\u529f\u6267\u884c\u5b8c\u4e00\u6761\u6307\u4ee4\u540e\uff0c\u5904\u7406\u673a\u628aRF\u7f6e\u4e3a0\uff0c\u5f53\u63a5\u53d7\u5230\u4e00\u4e2a\u975e\u8c03\u8bd5\u6545\u969c\u65f6\uff0c\u5904\u7406\u673a\u5c31\u628a\u5b83\u7f6e\u4e3a1\u3002
\n 4\u3001\u865a\u62df<\/span>8086\u65b9\u5f0f\u6807\u5fd7VM(Virtual 8086 Mode)
\n\u5982\u679c\u8be5\u6807\u5fd7\u7684\u503c\u4e3a1\uff0c\u5219\u8868\u793a\u5904\u7406\u673a\u5904\u4e8e\u865a\u62df\u76848086\u65b9\u5f0f\u4e0b\u7684\u5de5\u4f5c\u72b6\u6001\uff0c\u5426\u5219\uff0c\u5904\u7406\u673a\u5904\u4e8e\u4e00\u822c\u4fdd\u62a4\u65b9\u5f0f\u4e0b\u7684\u5de5\u4f5c\u72b6\u6001\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"