{"id":112,"date":"2017-10-31T00:09:47","date_gmt":"2017-10-30T16:09:47","guid":{"rendered":"http:\/\/www.hyh0.com\/?p=112"},"modified":"2017-11-01T22:02:44","modified_gmt":"2017-11-01T14:02:44","slug":"0-%e5%af%84%e5%ad%98%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.hyh0.com\/?p=112","title":{"rendered":"0.\u5bc4\u5b58\u5668"},"content":{"rendered":"<p>\u5bc4\u5b58\u5668\u662fCPU\u4e2d\u7a0b\u5e8f\u5458\u53ef\u4ee5\u7528\u6307\u4ee4\u8bfb\u5199\u7684\u90e8\u5206\uff0c\u7a0b\u5e8f\u5458\u901a\u8fc7\u6539\u53d8\u5404\u79cd\u5bc4\u5b58\u5668\u4e2d\u7684\u5185\u5bb9\u6765\u5b9e\u73b0\u5bf9CPU\u7684\u63a7\u5236<\/p>\n<p><!--more--><\/p>\n<p>8086CPU\u670914\u4e2a\u5bc4\u5b58\u5668\uff0c\u6bcf\u4e2a\u5bc4\u5b58\u5668\u6709\u4e00\u4e2a\u540d\u79f0\uff0c\u8fd9\u4e9b\u5bc4\u5b58\u5668\u662f\uff1aAX\u3001BX\u3001CX\u3001DX\u3001SI\u3001DI\u3001SP\u3001BP\u3001IP\u3001CS\u3001SS\u3001DS\u3001ES\u3001PSW<\/p>\n<h4>\u901a\u7528\u5bc4\u5b58\u5668<\/h4>\n<p>AX\u3001BX\u3001CX\u3001DX \u8fd94\u4e2a\u5bc4\u5b58\u5668\u53ef\u4ee5\u7528\u6765\u5b58\u653e\u4e00\u822c\u6027\u6570\u636e\uff0c\u88ab\u79f0\u4e3a\u901a\u7528\u5bc4\u5b58\u5668<\/p>\n<p>\u8fd94\u4e2a\u5bc4\u5b58\u5668\u90fd\u662f16\u4f4d\u7684\uff0c\u53ef\u4ee5\u5b58\u653e\u4e24\u4e2a\u5b57\u8282\uff0c\u540c\u65f6\u6bcf\u4e2a\u5bc4\u5b58\u5668\u53ef\u4ee5\u5206\u4e3a\u4e24\u4e2a8\u4f4d\u5bc4\u5b58\u5668\uff0c\u5982AX\u80fd\u591f\u88ab\u5206\u4e3aAH\uff08AX\u7684\u9ad88\u4f4d\uff09\u4e0eAL\uff08AX\u7684\u4f4e8\u4f4d\uff09<\/p>\n<p>\u7c7b\u4f3c\u7684\u8fd8\u6709BP\u3001SP\u3001SI\u3001 DI\u56db\u4e2a\u5bc4\u5b58\u5668\uff0c\u4f46\u8fd94\u4e2a\u5bc4\u5b58\u5668\u53ea\u80fd\u4ee516\u4f4d\u6a21\u5f0f\u8bbf\u95ee<\/p>\n<p>\u8fd9\u4e9b\u5bc4\u5b58\u5668\u8fd8\u80fd\u5206\u4e3a\u4ee5\u4e0b\u51e0\u7c7b\uff1a<\/p>\n<ul>\n<li>AX\u79f0\u4e3a\u7d2f\u52a0\u5668(Accumulator)\uff0c\u662fCPU\u4e2d\u4f7f\u7528\u6700\u591a\uff0c\u529f\u80fd\u6700\u5f3a\uff0c\u6267\u884c\u6548\u7387\u7684\u5bc4\u5b58\u5668<\/li>\n<li>BX\u3001SI\u3001DI\u4e0eBP\u88ab\u79f0\u4e3a\u57fa\u5730\u5740\u5bc4\u5b58\u5668(Base Register)\uff0c\u53ea\u80fd\u7528\u57fa\u5730\u5740\u5bc4\u5b58\u5668\u6765\u4f5c\u4e3a\u5730\u5740\u8bbf\u95ee\u5185\u5b58(\u4f8b\u5982[bx])\uff0c\u57fa\u5730\u5740\u5bc4\u5b58\u5668\u53ef\u4ee5\u7ec4\u5408\u51fa\u73b0\uff0c\u5982\u7528[bx + di]\u6765\u8bbf\u95ee\u5185\u5b58\uff0c\u4f46\u8981\u6ce8\u610f\u53ea\u6709\u56db\u79cd\u7ec4\u5408: bx&amp;si, bx&amp;di, bp&amp;si, bp&amp;di\u3002<\/li>\n<li>CX\u79f0\u4e3a\u8ba1\u6570\u5bc4\u5b58\u5668(Count Register)\uff0c\u4e0eloop\u6307\u4ee4\u914d\u5408\u4f7f\u7528\uff0c\u6bcfloop\u4e00\u6b21cx\u51cf\u4e00\uff0c\u5f53cx == 0\u65f6\u9000\u51faloop\u5faa\u73af<\/li>\n<li>DX\u79f0\u4e3a\u6570\u636e\u5bc4\u5b58\u5668(Data Register)<\/li>\n<\/ul>\n<h4>\u6bb5\u5bc4\u5b58\u5668<\/h4>\n<p>8086\u5728\u8bbf\u95ee\u5185\u5b58\u65f6\u8981\u901a\u8fc7\u6bb5\u5730\u5740\u4e0e\u504f\u79fb\u5730\u5740\u8bbf\u95ee\uff08\u901a\u8fc7\u5730\u5740\u52a0\u6cd5\u5668\u6700\u540e\u7684\u5730\u5740\u4e3a\uff1a\u6bb5\u5730\u5740*16 + \u504f\u79fb\u5730\u5740\uff09\uff0c\u6bb5\u5730\u5740\u50a8\u5b58\u5728\u6bb5\u5bc4\u5b58\u5668\u4e2d\u30028086\u67094\u4e2a\u6bb5\u5bc4\u5b58\u5668\uff0c\u5206\u522b\u4e3a\uff1aCS\u3001DS\u3001SS\u3001ES\u3002<\/p>\n<h5>CS\u4ee3\u7801\u6bb5\u5bc4\u5b58\u5668<\/h5>\n<p>CS\u4e3a\u4ee3\u7801\u6bb5\u5bc4\u5b58\u5668\uff0c\u5b83\u4e0eIP\uff08\u6307\u4ee4\u6307\u9488\u5bc4\u5b58\u5668\uff09\u5171\u540c\u6307\u793a\u4e86CPU\u5f53\u524d\u8981\u8bfb\u53d6\u6307\u4ee4\u7684\u5730\u5740\uff0c\u4efb\u610f\u65f6\u523b\uff0cCPU\u5c06CS:IP\u6307\u5411\u7684\u5185\u5bb9\u5f53\u4f5c\u6307\u4ee4\u6267\u884c<\/p>\n<p>\u4e0d\u80fd\u7528mov\u6307\u4ee4\u4fee\u6539CS:IP\u7684\u503c\uff0c\u9700\u8981\u7528\u201cjmp \u6bb5\u5730\u5740:\u504f\u79fb\u5730\u5740\u201d\u6307\u4ee4\u6765\u5b9e\u73b0\u4fee\u6539<\/p>\n<p>\u4e5f\u53ef\u4ee5\u4f7f\u7528\u201cjmp \u5408\u6cd5\u5bc4\u5b58\u5668\u201d \u6765\u5b9e\u73b0\u7528\u5bc4\u5b58\u5668\u4e2d\u7684\u503c\u4fee\u6539IP<\/p>\n<h5>DS\u6570\u636e\u6bb5\u5bc4\u5b58\u5668<\/h5>\n<p>DS\u5bc4\u5b58\u5668\u7528\u6765\u5b58\u653e\u8981\u8bbf\u95ee\u7684\u6570\u636e\u7684\u6bb5\u5730\u5740\uff0c\u7ed3\u5408[Address]\u6765\u5b9e\u73b0\u5bf9\u5185\u5b58\u7684\u8bbf\u95ee<\/p>\n<p>\u4f8b\u5982\u8981\u5c061000H:0\u7684\u6570\u636e\uff08\u4e00\u4e2a\u5b57\u8282\uff09\u8bfb\u5165AX<\/p>\n<pre class=\"brush: plain; title: ; notranslate\" title=\"\">\r\nmov bx, 1000H ;\u5c061000H\u7684\u6bb5\u5730\u5740\u5199\u5165bx\r\nmov ds, bx    ;\u5c06bx\u7684\u5730\u5740\u5199\u5165ds\r\nmov al, [0]   ;\u4eceds:0\u7684\u4f4d\u7f6e\u8bfb\u5199\u6570\u636e\u5199\u5165al\r\n<\/pre>\n<p>\u6ce8\u610f8086\u5e76\u4e0d\u652f\u6301\u76f4\u63a5\u5c06\u6570\u636e\u5199\u5165\u6bb5\u5bc4\u5b58\u5668\uff0c\u9700\u8981\u7528\u5bc4\u5b58\u5668\u4e2d\u8f6c<\/p>\n<p>\u82e5\u8981\u8bfb\u5199\u4e00\u4e2a\u5b57\uff0816\u4f4d\uff09\uff0c\u5219\u6709 mov ax, [0] \u7b49\u6548\u4e8e mov al, [0] \u4e0e mov ah, [1] \u4e24\u53e5\uff08\u5f53\u7136\u57288086\u4e2d\u53ef\u4ee5\u4e00\u6b21\u6027\u5b8c\u621016\u4f4d\u7684\u6570\u636e\u4f20\u9001\uff09<\/p>\n<h5>SS\u6808\u6bb5\u5bc4\u5b58\u5668<\/h5>\n<p>SS\u5bc4\u5b58\u5668\u4e0eSP\u5bc4\u5b58\u5668\u5171\u540c\uff08\u7ec4\u6210 SS:SP\uff09\u6307\u5411\u6808\u9876\u5143\u7d20\uff0c\u53ef\u4ee5\u7528pop\u4e0epush\u8fdb\u884c\u6808\u64cd\u4f5c<\/p>\n<p>push \u6307\u4ee4\u7531\u4e24\u6b65\u5b8c\u6210\uff1a<\/p>\n<ol>\n<li>SP -= 2\uff0c\u5c06SS:SP\u6307\u5411\u65b0\u7684\u6808\u9876<\/li>\n<li>\u5c06\u5bc4\u5b58\u5668\u4e2d\u7684\u6570\u636e\u9001\u5165SS:SP\u6307\u5411\u7684\u5185\u5b58\u5355\u5143<\/li>\n<\/ol>\n<p>pop \u6307\u4ee4\u540c\u6837\u7531\u4e24\u6b65\u7ec4\u6210\uff1a<\/p>\n<ol>\n<li>\u5c06SS:SP\u6307\u5411\u7684\u5185\u5b58\u5355\u5143\u7684\u6570\u636e\u9001\u5165\u5bc4\u5b58\u5668<\/li>\n<li>SP += 2<\/li>\n<\/ol>\n<p>\u6ce8\u610f\u57288086\u4e2d\u6ca1\u6709\u5bf9\u6808\u8d85\u754c\u7684\u68c0\u67e5\uff0c\u5e94\u8be5\u6ce8\u610f\u9632\u6b62\u51fa\u754c\u3002\u7531\u4e8epush\u4e0epop\u6307\u4ee4\u53ea\u4f1a\u4fee\u6539SP\uff0c\u6240\u4ee5\u6808\u4e0d\u4f1a\u8d85\u51faSS\u6307\u5411\u7684\u6bb5\uff0864K\uff09<\/p>\n<p>\u53ef\u4ee5\u7528mov\u6765\u4fee\u6539SS:SP\u7684\u503c\u6765\u8bbe\u7f6e\u6808\u9876\u4f4d\u7f6e<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5bc4\u5b58\u5668\u662fCPU\u4e2d\u7a0b\u5e8f\u5458\u53ef\u4ee5\u7528\u6307\u4ee4\u8bfb\u5199\u7684\u90e8\u5206\uff0c\u7a0b\u5e8f\u5458\u901a\u8fc7\u6539\u53d8\u5404\u79cd\u5bc4\u5b58\u5668\u4e2d\u7684\u5185\u5bb9\u6765\u5b9e\u73b0\u5bf9CPU\u7684\u63a7\u5236<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[7],"tags":[],"_links":{"self":[{"href":"https:\/\/www.hyh0.com\/index.php?rest_route=\/wp\/v2\/posts\/112"}],"collection":[{"href":"https:\/\/www.hyh0.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hyh0.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hyh0.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hyh0.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=112"}],"version-history":[{"count":6,"href":"https:\/\/www.hyh0.com\/index.php?rest_route=\/wp\/v2\/posts\/112\/revisions"}],"predecessor-version":[{"id":119,"href":"https:\/\/www.hyh0.com\/index.php?rest_route=\/wp\/v2\/posts\/112\/revisions\/119"}],"wp:attachment":[{"href":"https:\/\/www.hyh0.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=112"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hyh0.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=112"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hyh0.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=112"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}