\u7b2c\u4e94\u7ae0 bx\u548cloop\u6307\u4ee4 – \u6c47\u7f16\u8bed\u8a00\u63d0\u7eb2<\/title>\n <style>\n #asm-wrapper {\n all: initial;\n display: block;\n width: 100%;\n min-height: 100vh;\n margin: 0;\n padding: 30px 25px;\n box-sizing: border-box;\n font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, \"Helvetica Neue\", Arial, \"Microsoft YaHei\", sans-serif !important;\n line-height: 1.8;\n background: linear-gradient(180deg, #d4ecf7 0%, #a8e6cf 50%, #88d8b0 100%) !important;\n color: #2c3e50 !important;\n }\n #asm-wrapper * { box-sizing: border-box; margin: 0; padding: 0; }\n #asm-wrapper h1 { text-align: center; color: #1a5276 !important; font-size: 1.8em; border-bottom: 3px solid #27ae60 !important; padding-bottom: 15px; }\n #asm-wrapper h2 { color: #1e8449 !important; border-left: 4px solid #27ae60 !important; padding-left: 15px; margin-top: 30px; }\n #asm-wrapper h3 { color: #196f3d !important; margin-top: 20px; }\n #asm-wrapper p { margin: 10px 0; }\n #asm-wrapper ul, #asm-wrapper ol { margin: 10px 0; padding-left: 25px; }\n #asm-wrapper li { margin: 5px 0; }\n #asm-wrapper strong { color: #e74c3c !important; font-weight: 700 !important; }\n #asm-wrapper pre { background: #1e3d2f !important; color: #a8e6cf !important; padding: 15px 20px; border-radius: 8px; overflow-x: auto; font-size: 0.85em; line-height: 1.6; margin: 15px 0; border: 2px solid #27ae60; box-shadow: 0 4px 12px rgba(0,0,0,0.2); }\n #asm-wrapper pre code { background: none !important; padding: 0; color: inherit !important; border: none; }\n #asm-wrapper table { width: 100%; border-collapse: collapse; margin: 15px 0; font-size: 0.9em; }\n #asm-wrapper th, #asm-wrapper td { border: 1px solid #7f8c8d; padding: 10px 12px; text-align: left; }\n #asm-wrapper th { background: #27ae60 !important; color: white !important; }\n #asm-wrapper tr:nth-child(even) { background: #d5f5e3 !important; }\n #asm-wrapper img { max-width: 100%; height: auto; display: block; margin: 25px 0; padding: 15px; background: white !important; border-radius: 8px; box-shadow: 0 4px 15px rgba(0,0,0,0.15); border: 2px solid #27ae60; }\n #asm-wrapper hr { border: none; border-top: 2px dashed #27ae60; margin: 30px 0; }\n<\/style>\n<\/head>\n<body>\n <div id=\"asm-wrapper\">\n <h1>\u7b2c\u4e94\u7ae0 bx\u548cloop\u6307\u4ee4<\/h1>\n <pre><code>\u7b2c\u4e94\u7ae0 <![endif]>[BX]\u548cloop\u6307\u4ee4<\/strong><\/strong>\n\u63cf\u8ff0\u6027\u7b26\u53f7\u7ea6\u5b9a<\/code><\/pre>\n(…)\u8868\u793a\u4e00\u4e2a\u5bc4\u5b58\u5668\u6216\u5185\u5b58\u5355\u5143\u4e2d\u7684\u5185\u5bb9<\/p>\nidata\u8868\u793a\u5e38\u91cf<\/p>\n5.1~5.3[BX]\u548cloop\u53ca\u5176\u8ddf\u8e2a<\/p>\n<pre><code><![if !supportLists]>1. <![endif]>[BX]\nmov ax,[bx]<\/code><\/pre>\n\u8be5\u6307\u4ee4\u4e2dbx\u5b58\u653e\u7684\u662f\u5185\u5b58\u5355\u5143\u7684\u504f\u79fb\u5730\u5740\u3002\u8be5\u6307\u4ee4\u5c06ds:bx\u5904\u7684\u6570\u636e\u9001\u5165ax\u4e2d\u3002\u4ea6\u5373(ax)=((ds)*16+(bx))<\/p>\n<pre><code>mov [bx],ax<\/code><\/pre>\n\u8868\u793a\u5c06ax\u4e2d\u7684\u5185\u5bb9\u9001\u5165ds:bx\u5904\uff0c\u4ea6\u5373((ds)*16+(bx))=(ax)<\/p>\n<pre><code><![if !supportLists]>2. <![endif]>inc \u5bc4\u5b58\u5668<\/strong>\u5c06\u5bc4\u5b58\u5668\u7684\u5185\u5bb9\u52a01\uff0c\u5373(\u5bc4\u5b58\u5668)=(\u5bc4\u5b58\u5668)+1\n<![if !supportLists]>3. <![endif]>loop\u6307\u4ee4\u7684\u683c\u5f0f:\nloop \u6807\u53f7<\/code><\/pre>\n\u6267\u884cloop\u6307\u4ee4\u7684\u64cd\u4f5c:<\/p>\n\u2460(cx)=(cx)-1<\/strong><\/strong><\/p>\n\u2461\u5224\u65adcx\u4e2d\u7684\u503c,\u82e5(cx)==0\uff0c\u5411\u4e0b\u6267\u884c,\u82e5(cx)!=0\uff0c\u5219\u8f6c\u5230\u6807\u53f7\u5904\u6267\u884c\u7a0b\u5e8f<\/strong><\/p>\n<pre><code><![if !supportLists]>4. <![endif]>loop\u6307\u4ee4\u7684\u4f7f\u7528:\u8ba1\u7b972^12\nProgram 5-1<\/strong><\/strong>\nassume cs:code<\/strong><\/strong>\ncode segment<\/strong><\/strong>\nmov ax,2<\/strong><\/strong>\nmov cx,11<\/strong><\/strong>\ns:<\/strong>add ax,ax<\/strong><\/strong>\nloop s<\/strong><\/strong>\nmov ax,4c00h<\/strong><\/strong>\nint 21h<\/strong><\/strong>\ncode ends<\/strong><\/strong>\nend<\/strong><\/strong>\n\u5176\u4e2d\u7684s\u4e3a\u4e00\u4e2a\u6807\u53f7\uff0c\u6807\u8bc6\u4e86\u4e00\u4e2a\u5730\u5740\uff0c\u8be5\u5730\u5740\u4e0a\u6709\u4e00\u6761\u6307\u4ee4 add ax,ax<\/code><\/pre>\n\u603b\u7ed3<\/p>\n(1)cx\u4e2d\u5b58\u653e\u7684\u662f\u5faa\u73af\u6b21\u6570<\/strong><\/strong><\/p>\n(2)loop\u6307\u4ee4\u4e2d\u7684\u6807\u53f7\u6240\u6807\u8bc6\u5730\u5740\u8981\u5728\u524d\u9762<\/strong><\/strong><\/p>\n(3)\u8981\u5faa\u73af\u6267\u884c\u7684\u7a0b\u5e8f\u6bb5,\u8981\u5199\u5728loop\u548c\u6807\u53f7\u7684\u4e2d\u95f4<\/strong><\/strong><\/p>\n\u5faa\u73af\u529f\u80fd\u7684\u7a0b\u5e8f\u6846\u67b6<\/p>\n<pre><code>mov cx,\u5faa\u73af\u6b21\u6570<\/strong><\/strong><\/code><\/pre>\ns:\u5faa\u73af\u6267\u884c\u7684\u7a0b\u5e8f\u6bb5<\/strong><\/strong><\/p>\n<pre><code>loop s<\/strong><\/strong>\n<![if !supportLists]>5. <![endif]>\u5728\u6c47\u7f16\u6e90\u7a0b\u5e8f\u4e2d\uff0c\u6570\u636e\u4e0d\u80fd\u4ee5\u5b57\u6bcd\u5f00\u5934\uff0c\u53ef\u4ee5\u5728\u524d\u9762\u52a00\u89e3\u51b3<\/strong>\n<![if !supportLists]>6. <![endif]>\u5728debug\u4e2d,loop\u6307\u4ee4\u7684\u6807\u53f7\u53d8\u6210\u5177\u4f53\u7684\u504f\u79fb\u5730\u5740<\/u><\/u>\n<![if !supportLists]>7. <![endif]>debug\u7684\u547d\u4ee4<\/code><\/pre>\nG \u504f\u79fb\u5730\u5740<\/strong>\u4f7f\u5f97DEBUG\u4ece\u5f53\u524d\u7684CS:IP\u5904\u5f00\u59cb\u6267\u884c\uff0c\u76f4\u5230(IP)=\u504f\u79fb\u5730\u5740\u4e3a\u6b62<\/strong><\/strong><\/p>\nP<\/strong>\u7528\u4e8e\u5faa\u73af\u65f6\u53ef\u4ee5\u5c06\u5faa\u73af\u4e00\u6b21\u6027\u6267\u884c\u5b8c<\/strong><\/p>\n5.4 Debug\u548cmasm\u5bf9\u6307\u4ee4\u7684\u4e0d\u540c\u5904\u7406<\/p>\nmasm\u5c06[idata]\u89e3\u91ca\u4e3a\u7acb\u5373\u6570idata<\/u>\u3002\u82e5\u662f\u5185\u5b58\u5355\u5143\uff0c\u9700\u8981\u663e\u5f0f\u6307\u5b9a\u6bb5\u5bc4\u5b58\u5668,masm\u5c06ds:[idata]\u89e3\u91ca\u4e3ads:idata\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong>\uff0cmasm\u5bf9\u4e8e[bx]\u7684\u5904\u7406\u4e0edebug\u4e00\u81f4\u3002<\/p>\n5.5 loop\u548c[BX]\u7684\u8054\u5408\u5e94\u7528<\/p>\n\u5c06ffff:0~ffff:b\u5355\u5143\u4e2d\u6570\u636e\u7d2f\u52a0\uff0c\u4fdd\u5b58\u5728dx\u4e2d<\/p>\n\u95ee\u9898:8\u4f4d\u7684\u6570\u636e\u65e0\u6cd5\u9001\u516516\u4f4d\u7684\u5bc4\u5b58\u5668,\u800c8\u4f4d\u7684\u5bc4\u5b58\u5668\u7d2f\u52a0\u4f1a\u6ea2\u51fa<\/strong><\/strong><\/p>\n\u89e3\u51b3:\u4f7f\u7528\u4e00\u4e2a16\u4f4d\u901a\u7528\u5bc4\u5b58\u5668\u4f5c\u4e3a\u4e2d\u4ecb(\u5982ax),\u5c06\u6570\u636e\u9001\u5165al\u4e2d,\u518d\u4f7f\u7528ax\u8fdb\u884c\u7d2f\u52a0\u3002<\/strong><\/strong><\/p>\n\u7a0b\u5e8f\u5b9e\u73b0:<\/p>\n<pre><code>Program 5-2<\/strong><\/strong>\nassume cs:code\ncode segment\nmov ax,0ffffh<\/strong>;\u521d\u59cb\u5316\nmov ds,ax\nmov bx,0\nmov dx,0\nmov cx,12<\/code><\/pre>\n <\/p>\n<pre><code>s:mov al,[bx];\u7d2f\u52a0\nmov ah,0\nadd dx,ax\ninc bx\nloop s<\/code><\/pre>\n <\/p>\n<pre><code>mov ax,4c00h;;\u7a0b\u5e8f\u8fd4\u56de\nint 21h\ncode ends\nend<\/code><\/pre>\n5.6 \u6bb5\u524d\u7f00<\/p>\nds:[idata]<\/strong>\u8868\u793ads:idata\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong><\/strong><\/p>\ncs:[idata]<\/strong>\u8868\u793acs:idata\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong><\/strong><\/p>\nss:[idata]<\/strong>\u8868\u793ass:idata\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong><\/strong><\/p>\nes:[idata]<\/strong>\u8868\u793aes:idata\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong>es\u662f\u9644\u52a0\u6bb5\u5bc4\u5b58\u5668<\/strong><\/strong><\/p>\ncs:[bx]<\/strong>\u8868\u793acs:bx\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong><\/strong><\/p>\nss:[bx]<\/strong>\u8868\u793ass:bx\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong><\/strong><\/p>\nds:[bx]<\/strong>\u8868\u793ads:bx\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong><\/strong><\/p>\nes:[bx]<\/strong>\u8868\u793aes:bx\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong><\/strong><\/p>\n\u51fa\u73b0\u5728\u8bbf\u95ee\u5185\u5b58\u7684\u6307\u4ee4\u4e2d\u7684\u7528\u4e8e\u663e\u5f0f\u6307\u793a\u5185\u5b58\u5355\u5143\u6bb5\u5730\u5740\u7684ds: cs: es: ss:\u5728\u6c47\u7f16\u8bed\u8a00\u4e2d\u53eb\u505a\u6bb5\u524d\u7f00<\/strong><\/strong><\/p>\n5.7\u4e00\u6bb5\u5b89\u5168\u7684\u7a7a\u95f4<\/p>\n\u4e00\u822c\u60c5\u51b5\u4e0b\uff0cDOS\u548c\u5176\u4ed6\u5408\u6cd5\u7a0b\u5e8f\u4e0d\u4f7f\u75280:200~0:2ff\u5171256\u4e2a\u5b57\u8282\u7684\u7a7a\u95f4<\/u><\/p>\n\u5b9e\u9a8c4 [BX]\u548cloop\u7684\u4f7f\u7528<\/p>\n<pre><code><![if !supportLists]>(1) <![endif]>\u7f16\u7a0b\uff0c\u5411\u5185\u5b580:200~0:23f\u4f9d\u6b21\u4f20\u9012\u6570\u636e0~63(3fh)\u3002\nProgram ex-4-1\nassume cs:<\/strong>coding coding segment mov<\/strong> ax,0h mov<\/strong> ds,ax mov<\/strong> bx,23fh mov<\/strong> cx,64 mov<\/strong> dl,63 ;\u521d\u59cb\u5316<\/i> <\/i> ;ds:bx=0:23f,cx=64,dl=63<\/i> <\/i>s:<\/strong> mov<\/strong> ds:<\/strong>[bx],dl sub<\/strong> dl,1 ;dl--<\/i> <\/i> sub<\/strong> bx,1 ;bx--<\/i> <\/i> loop<\/strong> s mov<\/strong> ax,4c00h int<\/strong> 21h coding ends end\n<![if !supportLists]>(2) <![endif]>\u7f16\u7a0b\uff0c\u5411\u5185\u5b580:200~0:23f\u4f9d\u6b21\u4f20\u9012\u6570\u636e0~63(3fh)\uff0c\u7a0b\u5e8f\u4e2d\u53ea\u80fd\u4f7f\u75289\u6761\u6307\u4ee4\uff0c9\u6761\u6307\u4e2d\u5305\u62ec\u201cmov ax,4c00h\u201d\u548c\u201cint 21h\u201d\u3002\nProgram ex-4-2\nassume cs:code\ncode segment\nmov ax,20h\nmov ds,ax\nmov bx,0\nmov cx,40h;\u6216mov cx,64\ns:mov [bx],bl\ninc bx\nloop s\nmov ax,4c00h\nint 21h\ncode ends\nend\n(3)\u4e0b\u9762\u7684\u7a0b\u5e8f\u529f\u80fd\u662f\u5c06\u201cmov ax,4c00h\"\u4e4b\u524d\u7684\u6307\u4ee4\u590d\u5236\u5230\u5185\u5b580:200\u5904\uff0c\u8865\u5168\u7a0b\u5e8f\u3002\u4e0a\u673a\u8c03\u8bd5\uff0c\u8ddf\u8e2a\u8fd0\u884c\u7ed3\u679c\u3002\nassume cs:code \ncode segment \n mov ax, code <\/u>;\u6216mov ax, cs <\/u>\n mov ds,ax \n mov ax,0020h \n mov es,ax \n mov bx,0 \n mov cx, 18h <\/u>;\u6216mov cx, 17h <\/u>;\u6216sub cx,5\n s: mov al,[bx] \n mov es:[bx],al \n inc bx \n loop s \n mov ax,4c00h \n int 21h \ncode ends \nend<\/code><\/pre>\n\u6b64\u9898\u6709\u591a\u4e2a\u7b54\u6848\uff0c\u56e0\u4e3amov\u7528\u5728\u5bc4\u5b58\u5668\u4e4b\u95f4\u4f20\u9001\u6570\u636e\u7684\u6307\u4ee4\u662f2\u4e2a\u5b57\u8282\uff0c\u7528\u5728\u5bc4\u5b58\u5668\u548c\u7acb\u5373\u6570\u4e4b\u95f4\u662f3\u4e2a\u5b57\u8282<\/p>\n<pre><code>\u7b54\u68481:mov ax,cs (\u53602\u4e2a\u5b57\u8282) \n mov cx,17 \n\u7b54\u68482:mov ax,code (\u53603\u4e2a\u5b57\u8282) \n mov cx,18 \n\u7b54\u68483:mov ax,cs \u6216mov ax,code \n \u628amov cx, <\/u>\u6539\u6210 sub cx,5\n(\u56e0\u4e3a\u5728\u8f7d\u5165\u7a0b\u5e8f\u65f6,cx\u4fdd\u5b58\u7a0b\u5e8f\u7684\u957f\u5ea6,\u51cf\u53bb5\u662f\u4e3a\u51cf\u53bbmov ax,4c00h\u548cint 21h\u7684\u957f\u5ea6)\n\u7b54\u68484:mov ax,cx\n mov cx,23<\/code><\/pre>\n\u53ef\u4ee5\u7528debug\u6765\u67e5\u770b\u6307\u4ee4\u7684\u957f\u5ea6<\/p>\n\n <\/div>\n<\/body>\n<\/html>\n\n","protected":false},"excerpt":{"rendered":"\u7b2c\u4e94\u7ae0 bx\u548cloop\u6307\u4ee4 &#8211 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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{"id":494,"date":"2026-03-07T19:53:19","date_gmt":"2026-03-07T11:53:19","guid":{"rendered":"http:\/\/8.129.82.128\/?p=494"},"modified":"2026-03-07T19:53:19","modified_gmt":"2026-03-07T11:53:19","slug":"8086-%e6%b1%87%e7%bc%965","status":"publish","type":"post","link":"http:\/\/8.129.82.128\/?p=494","title":{"rendered":"8086 \u6c47\u7f16#5"},"content":{"rendered":"\n\n\n\n \n \n \u7b2c\u4e94\u7ae0 bx\u548cloop\u6307\u4ee4 – \u6c47\u7f16\u8bed\u8a00\u63d0\u7eb2<\/title>\n <style>\n #asm-wrapper {\n all: initial;\n display: block;\n width: 100%;\n min-height: 100vh;\n margin: 0;\n padding: 30px 25px;\n box-sizing: border-box;\n font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, \"Helvetica Neue\", Arial, \"Microsoft YaHei\", sans-serif !important;\n line-height: 1.8;\n background: linear-gradient(180deg, #d4ecf7 0%, #a8e6cf 50%, #88d8b0 100%) !important;\n color: #2c3e50 !important;\n }\n #asm-wrapper * { box-sizing: border-box; margin: 0; padding: 0; }\n #asm-wrapper h1 { text-align: center; color: #1a5276 !important; font-size: 1.8em; border-bottom: 3px solid #27ae60 !important; padding-bottom: 15px; }\n #asm-wrapper h2 { color: #1e8449 !important; border-left: 4px solid #27ae60 !important; padding-left: 15px; margin-top: 30px; }\n #asm-wrapper h3 { color: #196f3d !important; margin-top: 20px; }\n #asm-wrapper p { margin: 10px 0; }\n #asm-wrapper ul, #asm-wrapper ol { margin: 10px 0; padding-left: 25px; }\n #asm-wrapper li { margin: 5px 0; }\n #asm-wrapper strong { color: #e74c3c !important; font-weight: 700 !important; }\n #asm-wrapper pre { background: #1e3d2f !important; color: #a8e6cf !important; padding: 15px 20px; border-radius: 8px; overflow-x: auto; font-size: 0.85em; line-height: 1.6; margin: 15px 0; border: 2px solid #27ae60; box-shadow: 0 4px 12px rgba(0,0,0,0.2); }\n #asm-wrapper pre code { background: none !important; padding: 0; color: inherit !important; border: none; }\n #asm-wrapper table { width: 100%; border-collapse: collapse; margin: 15px 0; font-size: 0.9em; }\n #asm-wrapper th, #asm-wrapper td { border: 1px solid #7f8c8d; padding: 10px 12px; text-align: left; }\n #asm-wrapper th { background: #27ae60 !important; color: white !important; }\n #asm-wrapper tr:nth-child(even) { background: #d5f5e3 !important; }\n #asm-wrapper img { max-width: 100%; height: auto; display: block; margin: 25px 0; padding: 15px; background: white !important; border-radius: 8px; box-shadow: 0 4px 15px rgba(0,0,0,0.15); border: 2px solid #27ae60; }\n #asm-wrapper hr { border: none; border-top: 2px dashed #27ae60; margin: 30px 0; }\n<\/style>\n<\/head>\n<body>\n <div id=\"asm-wrapper\">\n <h1>\u7b2c\u4e94\u7ae0 bx\u548cloop\u6307\u4ee4<\/h1>\n <pre><code>\u7b2c\u4e94\u7ae0 <![endif]>[BX]\u548cloop\u6307\u4ee4<\/strong><\/strong>\n\u63cf\u8ff0\u6027\u7b26\u53f7\u7ea6\u5b9a<\/code><\/pre>\n(…)\u8868\u793a\u4e00\u4e2a\u5bc4\u5b58\u5668\u6216\u5185\u5b58\u5355\u5143\u4e2d\u7684\u5185\u5bb9<\/p>\nidata\u8868\u793a\u5e38\u91cf<\/p>\n5.1~5.3[BX]\u548cloop\u53ca\u5176\u8ddf\u8e2a<\/p>\n<pre><code><![if !supportLists]>1. <![endif]>[BX]\nmov ax,[bx]<\/code><\/pre>\n\u8be5\u6307\u4ee4\u4e2dbx\u5b58\u653e\u7684\u662f\u5185\u5b58\u5355\u5143\u7684\u504f\u79fb\u5730\u5740\u3002\u8be5\u6307\u4ee4\u5c06ds:bx\u5904\u7684\u6570\u636e\u9001\u5165ax\u4e2d\u3002\u4ea6\u5373(ax)=((ds)*16+(bx))<\/p>\n<pre><code>mov [bx],ax<\/code><\/pre>\n\u8868\u793a\u5c06ax\u4e2d\u7684\u5185\u5bb9\u9001\u5165ds:bx\u5904\uff0c\u4ea6\u5373((ds)*16+(bx))=(ax)<\/p>\n<pre><code><![if !supportLists]>2. <![endif]>inc \u5bc4\u5b58\u5668<\/strong>\u5c06\u5bc4\u5b58\u5668\u7684\u5185\u5bb9\u52a01\uff0c\u5373(\u5bc4\u5b58\u5668)=(\u5bc4\u5b58\u5668)+1\n<![if !supportLists]>3. <![endif]>loop\u6307\u4ee4\u7684\u683c\u5f0f:\nloop \u6807\u53f7<\/code><\/pre>\n\u6267\u884cloop\u6307\u4ee4\u7684\u64cd\u4f5c:<\/p>\n\u2460(cx)=(cx)-1<\/strong><\/strong><\/p>\n\u2461\u5224\u65adcx\u4e2d\u7684\u503c,\u82e5(cx)==0\uff0c\u5411\u4e0b\u6267\u884c,\u82e5(cx)!=0\uff0c\u5219\u8f6c\u5230\u6807\u53f7\u5904\u6267\u884c\u7a0b\u5e8f<\/strong><\/p>\n<pre><code><![if !supportLists]>4. <![endif]>loop\u6307\u4ee4\u7684\u4f7f\u7528:\u8ba1\u7b972^12\nProgram 5-1<\/strong><\/strong>\nassume cs:code<\/strong><\/strong>\ncode segment<\/strong><\/strong>\nmov ax,2<\/strong><\/strong>\nmov cx,11<\/strong><\/strong>\ns:<\/strong>add ax,ax<\/strong><\/strong>\nloop s<\/strong><\/strong>\nmov ax,4c00h<\/strong><\/strong>\nint 21h<\/strong><\/strong>\ncode ends<\/strong><\/strong>\nend<\/strong><\/strong>\n\u5176\u4e2d\u7684s\u4e3a\u4e00\u4e2a\u6807\u53f7\uff0c\u6807\u8bc6\u4e86\u4e00\u4e2a\u5730\u5740\uff0c\u8be5\u5730\u5740\u4e0a\u6709\u4e00\u6761\u6307\u4ee4 add ax,ax<\/code><\/pre>\n\u603b\u7ed3<\/p>\n(1)cx\u4e2d\u5b58\u653e\u7684\u662f\u5faa\u73af\u6b21\u6570<\/strong><\/strong><\/p>\n(2)loop\u6307\u4ee4\u4e2d\u7684\u6807\u53f7\u6240\u6807\u8bc6\u5730\u5740\u8981\u5728\u524d\u9762<\/strong><\/strong><\/p>\n(3)\u8981\u5faa\u73af\u6267\u884c\u7684\u7a0b\u5e8f\u6bb5,\u8981\u5199\u5728loop\u548c\u6807\u53f7\u7684\u4e2d\u95f4<\/strong><\/strong><\/p>\n\u5faa\u73af\u529f\u80fd\u7684\u7a0b\u5e8f\u6846\u67b6<\/p>\n<pre><code>mov cx,\u5faa\u73af\u6b21\u6570<\/strong><\/strong><\/code><\/pre>\ns:\u5faa\u73af\u6267\u884c\u7684\u7a0b\u5e8f\u6bb5<\/strong><\/strong><\/p>\n<pre><code>loop s<\/strong><\/strong>\n<![if !supportLists]>5. <![endif]>\u5728\u6c47\u7f16\u6e90\u7a0b\u5e8f\u4e2d\uff0c\u6570\u636e\u4e0d\u80fd\u4ee5\u5b57\u6bcd\u5f00\u5934\uff0c\u53ef\u4ee5\u5728\u524d\u9762\u52a00\u89e3\u51b3<\/strong>\n<![if !supportLists]>6. <![endif]>\u5728debug\u4e2d,loop\u6307\u4ee4\u7684\u6807\u53f7\u53d8\u6210\u5177\u4f53\u7684\u504f\u79fb\u5730\u5740<\/u><\/u>\n<![if !supportLists]>7. <![endif]>debug\u7684\u547d\u4ee4<\/code><\/pre>\nG \u504f\u79fb\u5730\u5740<\/strong>\u4f7f\u5f97DEBUG\u4ece\u5f53\u524d\u7684CS:IP\u5904\u5f00\u59cb\u6267\u884c\uff0c\u76f4\u5230(IP)=\u504f\u79fb\u5730\u5740\u4e3a\u6b62<\/strong><\/strong><\/p>\nP<\/strong>\u7528\u4e8e\u5faa\u73af\u65f6\u53ef\u4ee5\u5c06\u5faa\u73af\u4e00\u6b21\u6027\u6267\u884c\u5b8c<\/strong><\/p>\n5.4 Debug\u548cmasm\u5bf9\u6307\u4ee4\u7684\u4e0d\u540c\u5904\u7406<\/p>\nmasm\u5c06[idata]\u89e3\u91ca\u4e3a\u7acb\u5373\u6570idata<\/u>\u3002\u82e5\u662f\u5185\u5b58\u5355\u5143\uff0c\u9700\u8981\u663e\u5f0f\u6307\u5b9a\u6bb5\u5bc4\u5b58\u5668,masm\u5c06ds:[idata]\u89e3\u91ca\u4e3ads:idata\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong>\uff0cmasm\u5bf9\u4e8e[bx]\u7684\u5904\u7406\u4e0edebug\u4e00\u81f4\u3002<\/p>\n5.5 loop\u548c[BX]\u7684\u8054\u5408\u5e94\u7528<\/p>\n\u5c06ffff:0~ffff:b\u5355\u5143\u4e2d\u6570\u636e\u7d2f\u52a0\uff0c\u4fdd\u5b58\u5728dx\u4e2d<\/p>\n\u95ee\u9898:8\u4f4d\u7684\u6570\u636e\u65e0\u6cd5\u9001\u516516\u4f4d\u7684\u5bc4\u5b58\u5668,\u800c8\u4f4d\u7684\u5bc4\u5b58\u5668\u7d2f\u52a0\u4f1a\u6ea2\u51fa<\/strong><\/strong><\/p>\n\u89e3\u51b3:\u4f7f\u7528\u4e00\u4e2a16\u4f4d\u901a\u7528\u5bc4\u5b58\u5668\u4f5c\u4e3a\u4e2d\u4ecb(\u5982ax),\u5c06\u6570\u636e\u9001\u5165al\u4e2d,\u518d\u4f7f\u7528ax\u8fdb\u884c\u7d2f\u52a0\u3002<\/strong><\/strong><\/p>\n\u7a0b\u5e8f\u5b9e\u73b0:<\/p>\n<pre><code>Program 5-2<\/strong><\/strong>\nassume cs:code\ncode segment\nmov ax,0ffffh<\/strong>;\u521d\u59cb\u5316\nmov ds,ax\nmov bx,0\nmov dx,0\nmov cx,12<\/code><\/pre>\n <\/p>\n<pre><code>s:mov al,[bx];\u7d2f\u52a0\nmov ah,0\nadd dx,ax\ninc bx\nloop s<\/code><\/pre>\n <\/p>\n<pre><code>mov ax,4c00h;;\u7a0b\u5e8f\u8fd4\u56de\nint 21h\ncode ends\nend<\/code><\/pre>\n5.6 \u6bb5\u524d\u7f00<\/p>\nds:[idata]<\/strong>\u8868\u793ads:idata\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong><\/strong><\/p>\ncs:[idata]<\/strong>\u8868\u793acs:idata\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong><\/strong><\/p>\nss:[idata]<\/strong>\u8868\u793ass:idata\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong><\/strong><\/p>\nes:[idata]<\/strong>\u8868\u793aes:idata\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong>es\u662f\u9644\u52a0\u6bb5\u5bc4\u5b58\u5668<\/strong><\/strong><\/p>\ncs:[bx]<\/strong>\u8868\u793acs:bx\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong><\/strong><\/p>\nss:[bx]<\/strong>\u8868\u793ass:bx\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong><\/strong><\/p>\nds:[bx]<\/strong>\u8868\u793ads:bx\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong><\/strong><\/p>\nes:[bx]<\/strong>\u8868\u793aes:bx\u5904\u7684\u5185\u5b58\u5355\u5143<\/strong><\/strong><\/p>\n\u51fa\u73b0\u5728\u8bbf\u95ee\u5185\u5b58\u7684\u6307\u4ee4\u4e2d\u7684\u7528\u4e8e\u663e\u5f0f\u6307\u793a\u5185\u5b58\u5355\u5143\u6bb5\u5730\u5740\u7684ds: cs: es: ss:\u5728\u6c47\u7f16\u8bed\u8a00\u4e2d\u53eb\u505a\u6bb5\u524d\u7f00<\/strong><\/strong><\/p>\n5.7\u4e00\u6bb5\u5b89\u5168\u7684\u7a7a\u95f4<\/p>\n\u4e00\u822c\u60c5\u51b5\u4e0b\uff0cDOS\u548c\u5176\u4ed6\u5408\u6cd5\u7a0b\u5e8f\u4e0d\u4f7f\u75280:200~0:2ff\u5171256\u4e2a\u5b57\u8282\u7684\u7a7a\u95f4<\/u><\/p>\n\u5b9e\u9a8c4 [BX]\u548cloop\u7684\u4f7f\u7528<\/p>\n<pre><code><![if !supportLists]>(1) <![endif]>\u7f16\u7a0b\uff0c\u5411\u5185\u5b580:200~0:23f\u4f9d\u6b21\u4f20\u9012\u6570\u636e0~63(3fh)\u3002\nProgram ex-4-1\nassume cs:<\/strong>coding coding segment mov<\/strong> ax,0h mov<\/strong> ds,ax mov<\/strong> bx,23fh mov<\/strong> cx,64 mov<\/strong> dl,63 ;\u521d\u59cb\u5316<\/i> <\/i> ;ds:bx=0:23f,cx=64,dl=63<\/i> <\/i>s:<\/strong> mov<\/strong> ds:<\/strong>[bx],dl sub<\/strong> dl,1 ;dl--<\/i> <\/i> sub<\/strong> bx,1 ;bx--<\/i> <\/i> loop<\/strong> s mov<\/strong> ax,4c00h int<\/strong> 21h coding ends end\n<![if !supportLists]>(2) <![endif]>\u7f16\u7a0b\uff0c\u5411\u5185\u5b580:200~0:23f\u4f9d\u6b21\u4f20\u9012\u6570\u636e0~63(3fh)\uff0c\u7a0b\u5e8f\u4e2d\u53ea\u80fd\u4f7f\u75289\u6761\u6307\u4ee4\uff0c9\u6761\u6307\u4e2d\u5305\u62ec\u201cmov ax,4c00h\u201d\u548c\u201cint 21h\u201d\u3002\nProgram ex-4-2\nassume cs:code\ncode segment\nmov ax,20h\nmov ds,ax\nmov bx,0\nmov cx,40h;\u6216mov cx,64\ns:mov [bx],bl\ninc bx\nloop s\nmov ax,4c00h\nint 21h\ncode ends\nend\n(3)\u4e0b\u9762\u7684\u7a0b\u5e8f\u529f\u80fd\u662f\u5c06\u201cmov ax,4c00h\"\u4e4b\u524d\u7684\u6307\u4ee4\u590d\u5236\u5230\u5185\u5b580:200\u5904\uff0c\u8865\u5168\u7a0b\u5e8f\u3002\u4e0a\u673a\u8c03\u8bd5\uff0c\u8ddf\u8e2a\u8fd0\u884c\u7ed3\u679c\u3002\nassume cs:code \ncode segment \n mov ax, code <\/u>;\u6216mov ax, cs <\/u>\n mov ds,ax \n mov ax,0020h \n mov es,ax \n mov bx,0 \n mov cx, 18h <\/u>;\u6216mov cx, 17h <\/u>;\u6216sub cx,5\n s: mov al,[bx] \n mov es:[bx],al \n inc bx \n loop s \n mov ax,4c00h \n int 21h \ncode ends \nend<\/code><\/pre>\n\u6b64\u9898\u6709\u591a\u4e2a\u7b54\u6848\uff0c\u56e0\u4e3amov\u7528\u5728\u5bc4\u5b58\u5668\u4e4b\u95f4\u4f20\u9001\u6570\u636e\u7684\u6307\u4ee4\u662f2\u4e2a\u5b57\u8282\uff0c\u7528\u5728\u5bc4\u5b58\u5668\u548c\u7acb\u5373\u6570\u4e4b\u95f4\u662f3\u4e2a\u5b57\u8282<\/p>\n<pre><code>\u7b54\u68481:mov ax,cs (\u53602\u4e2a\u5b57\u8282) \n mov cx,17 \n\u7b54\u68482:mov ax,code (\u53603\u4e2a\u5b57\u8282) \n mov cx,18 \n\u7b54\u68483:mov ax,cs \u6216mov ax,code \n \u628amov cx, <\/u>\u6539\u6210 sub cx,5\n(\u56e0\u4e3a\u5728\u8f7d\u5165\u7a0b\u5e8f\u65f6,cx\u4fdd\u5b58\u7a0b\u5e8f\u7684\u957f\u5ea6,\u51cf\u53bb5\u662f\u4e3a\u51cf\u53bbmov ax,4c00h\u548cint 21h\u7684\u957f\u5ea6)\n\u7b54\u68484:mov ax,cx\n mov cx,23<\/code><\/pre>\n\u53ef\u4ee5\u7528debug\u6765\u67e5\u770b\u6307\u4ee4\u7684\u957f\u5ea6<\/p>\n\n <\/div>\n<\/body>\n<\/html>\n\n","protected":false},"excerpt":{"rendered":"\u7b2c\u4e94\u7ae0 bx\u548cloop\u6307\u4ee4 &#8211 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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