\u7b2c\u5341\u7ae0 CALL\u548cRET\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\u5341\u7ae0 CALL\u548cRET\u6307\u4ee4<\/h1>\n <pre><code>\u7b2c\u5341\u7ae0 CALL\u548cRET\u6307\u4ee4<\/strong><\/strong>\n10.1 ret\u548cretf\nret\u7528\u6808\u4e2d\u7684\u6570\u636e\u4fee\u6539IP\u7684\u5185\u5bb9,\u5b9e\u73b0\u8fd1\u8f6c\u79fb<\/u>\nret\u6307\u4ee4\u6267\u884c\u8fc7\u7a0b\u76f8\u5f53\u4e8e:pop IP\nretf\u7528\u6808\u4e2d\u7684\u6570\u636e\u4fee\u6539CS\u548cIP\u4e2d\u7684\u5185\u5bb9\uff0c\u5b9e\u73b0\u8fdc\u8f6c\u79fb<\/u><\/u>\nretf\u6307\u4ee4\u6267\u884c\u8fc7\u7a0b\u76f8\u5f53\u4e8e:\npop IP\npop CS<\/code><\/pre>\n\u68c0\u6d4b\u70b910.1 <\/p>\n<pre><code>\u8865\u5168\u7a0b\u5e8f\uff0c\u5b9e\u73b0\u4ece\u5185\u5b581000\uff1a0000\u5904\u5f00\u59cb\u6267\u884c\u6307\u4ee4\u3002\nassume cs:code\nstack segment\ndb 16 dup (0)\nstack ends\ncode segment\nstart:mov ax,stack\nmov ss,ax\nmov sp,16\nmov ax, 1000h <\/u><\/u>\npush ax\nmov ax, 0 <\/u>\npush ax\nretf\ncode ends\nend start\n10.2~10.6 call\u6307\u4ee4\n<![if !supportLists]>1. <![endif]>\u6267\u884ccall\u6307\u4ee4\u65f6,\u8fdb\u884c\u4e24\u6b65\u64cd\u4f5c:\n<![if !supportLists]>(1) <![endif]>\u5c06\u5f53\u524d\u7684IP\u6216CS\u548cIP\u538b\u5165\u6808\u4e2d\n<![if !supportLists]>(2) <![endif]>\u8f6c\u79fb\ncall\u4e0d\u80fd\u5b9e\u73b0\u77ed\u8f6c\u79fb\uff0c\u5176\u5b9e\u73b0\u8f6c\u79fb\u7684\u65b9\u6cd5\u548cjmp\u6307\u4ee4\u539f\u7406\u76f8\u540c<\/u><\/u>\n<![if !supportLists]>2. <![endif]>\u4f9d\u636e\u4f4d\u79fb\u8fdb\u884c\u8f6c\u79fb\u7684call\u6307\u4ee4\ncall \u6807\u53f7<\/strong><\/strong>\n\u6b64\u6307\u4ee4\u5c06\u5f53\u524dIP\u538b\u5165\u6808\u4e2d,\u5e76\u8f6c\u5230\u6807\u53f7\u5904\u6267\u884c\u6307\u4ee4<\/u>\uff0c\u76f8\u5f53\u4e8e\u8fdb\u884c:\npush IP\njmp near ptr \u6807\u53f7\n\u5728call\u6307\u4ee4\u7684\u673a\u5668\u7801\u4e2d\u6ca1\u6709\u8f6c\u79fb\u7684\u76ee\u7684\u5730\u5740,\u800c\u662f\u4f4d\u79fb\n\u6ce8\u610f:\u8bfb\u53d6\u4e00\u6761\u6307\u4ee4\u540e,IP\u4e2d\u7684\u503c\u81ea\u52a8\u589e\u52a0,\u518d\u6267\u884c\u8bfb\u53d6\u7684\u6307\u4ee4<\/u><\/strong><\/u><\/strong><\/code><\/pre>\n\u68c0\u6d4b\u70b910.2<\/p>\n\u4e0b\u9762\u7684\u7a0b\u5e8f\u6267\u884c\u540e\uff0cax\u4e2d\u7684\u6570\u503c\u4e3a\u591a\u5c11\uff1f<\/p>\n<pre><code>\u5185\u5b58\u5730\u5740 \u673a\u5668\u7801 \u6c47\u7f16\u6307\u4ee4 \u6267\u884c\u540e\u60c5\u51b5\n1000:0 b8 00 00 mov ax,0 ax=0 ip\u6307\u54111000:3\n1000:3 e8 01 00 call s pop ip ip\u6307\u54111000:7\n1000:6 40 inc ax\n1000:7 58 s:pop ax ax=6\n\u7528debug\u8fdb\u884c\u8ddf\u8e2a\u786e\u8ba4\uff0c\u201ccall \u6807\u53f7\u201d\u662f\u5c06\u8be5\u6307\u4ee4\u540e\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u5730\u5740\u5165\u6808\uff0c\u518d\u8f6c\u5230\u6807\u53f7\u5904\u6267\u884c\u6307\u4ee4\u3002\n<![if !supportLists]>3. <![endif]>\u8f6c\u79fb\u7684\u76ee\u7684\u5730\u5740\u5728\u6307\u4ee4\u4e2d\u7684call\u6307\u4ee4\ncall far ptr \u6807\u53f7<\/strong><\/strong>\n\u8be5\u6307\u4ee4\u5b9e\u73b0\u6bb5\u95f4\u8f6c\u79fb\uff0c\u76f8\u5f53\u4e8e:\npush CS\npush IP\njmp far ptr \u6807\u53f7<\/code><\/pre>\n\u68c0\u6d4b\u70b910.3<\/p>\n\u4e0b\u9762\u7684\u7a0b\u5e8f\u6267\u884c\u540e\uff0cax\u4e2d\u7684\u6570\u503c\u4e3a\u591a\u5c11\uff1f <\/p>\n<pre><code>\u5185\u5b58\u5730\u5740 \u673a\u5668\u7801 \u6c47\u7f16\u6307\u4ee4 \u6267\u884c\u540e\u60c5\u51b5 \n1000:0 b8 00 00 mov ax,0 ax=0,ip\u6307\u54111000:3 \n1000:3 9a 09 00 00 10 call far ptr s pop cs,pop ip,ip\u6307\u54111000:9 \n1000:8 40 inc ax \n1000:9 58 s:pop ax ax=8h \n add ax,ax ax=10h \n pop bx bx=1000h \n add ax,bx ax=1010h \n\u7528debug\u8fdb\u884c\u8ddf\u8e2a\u786e\u8ba4\uff0c\u201ccall far ptr s\u201d\u662f\u5148\u5c06\u8be5\u6307\u4ee4\u540e\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u6bb5\u5730\u5740cs=1000h\u5165\u6808\uff0c\u518d\u5c06\u504f\u79fb\u5730\u5740ip=8h\u5165\u6808\uff0c\u6700\u540e\u8f6c\u5230\u6807\u53f7\u5904\u6267\u884c\u6307\u4ee4\u3002 <\/code><\/pre>\n\u51fa\u6808\u65f6\uff0c\u6839\u636e\u6808\u5148\u8fdb\u540e\u51fa\u7684\u539f\u5219\uff0c\u5148\u51fa\u7684\u4e3aip\uff1d8h\uff0c\u540e\u51fa\u7684\u4e3acs\uff1d1000h<\/p>\n<pre><code><![if !supportLists]>4. <![endif]>\u8f6c\u79fb\u5730\u5740\u5728\u5bc4\u5b58\u5668\u4e2d\u7684call\u6307\u4ee4\ncall <\/strong> 16\u4f4dreg<\/strong><\/strong><\/code><\/pre>\n\u76f8\u5f53\u4e8e:<\/p>\n<pre><code>push IP\njmp 16\u4f4dreg<\/code><\/pre>\n\u68c0\u6d4b\u70b910.4<\/p>\n\u4e0b\u9762\u7684\u7a0b\u5e8f\u6267\u884c\u540e\uff0cax\u4e2d\u7684\u6570\u503c\u4e3a\u591a\u5c11\uff1f<\/p>\n<pre><code>\u5185\u5b58\u5730\u5740 \u673a\u5668\u7801 \u6c47\u7f16\u6307\u4ee4 \u6267\u884c\u540e\u60c5\u51b5\n1000:0 b8 06 00 mov ax,6 ax=6,ip\u6307\u54111000:3\n1000:3 ff d0 call ax pop ip,ip\u6307\u54111000:6\n1000:5 40 inc ax\n1000:6 58 mov bp,sp bp=sp=fffeh\n add ax,[bp] ax=[6+ds:(fffeh)]=6+5=0bh\n\u7528debug\u8fdb\u884c\u8ddf\u8e2a\u786e\u8ba4\uff0c\u201ccall ax(16\u4f4dreg)\u201d\u662f\u5148\u5c06\u8be5\u6307\u4ee4\u540e\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u5730\u5740ip\u5165\u6808\uff0c\u518d\u8f6c\u5230\u504f\u79fb\u5730\u5740\u4e3aax(16\u4f4dreg)\u5904\u6267\u884c\u6307\u4ee4\u3002\n<![if !supportLists]>5. <![endif]>\u8f6c\u79fb\u5730\u5740\u5728\u5185\u5b58\u4e2d\u7684call\u6307\u4ee4\n<![if !supportLists]>(1) <![endif]>call word ptr \u5185\u5b58\u5355\u5143\u5730\u5740<\/strong><\/strong><\/code><\/pre>\n\u76f8\u5f53\u4e8e:<\/p>\n<pre><code>push IP\njmp word ptr \u5185\u5b58\u5355\u5143\u5730\u5740\n<![if !supportLists]>(2) <![endif]>call dword ptr \u5185\u5b58\u5355\u5143\u5730\u5740<\/strong><\/strong><\/code><\/pre>\n\u76f8\u5f53\u4e8e:<\/p>\n<pre><code>push CS\npush IP\njmp dword ptr \u5185\u5b58\u5355\u5143\u5730\u5740<\/code><\/pre>\n\u68c0\u6d4b\u70b910.5<\/p>\n(1)\u4e0b\u9762\u7684\u7a0b\u5e8f\u6267\u884c\u540e\uff0cax\u4e2d\u7684\u6570\u503c\u4e3a\u591a\u5c11\uff1f<\/p>\n<pre><code>assume cs:code\nstack segment\ndw 8 dup (0)\nstack ends\ncode segment\nstart:mov ax,stack\nmov ss,ax\nmov sp,16\nmov ds,ax\nmov ax,0\ncall word ptr ds:[0eh]\ninc ax\ninc ax\ninc ax\nmov ax,4c00h\nint 21h\ncode ends\nend start\n\u6267\u884ccall word ptr ds:[0eh]\u6307\u4ee4\u65f6\uff0c\u5148cs\u5165\u6808\uff0c\u518dip=11\u5165\u6808\uff0c\u6700\u540eip\u8f6c\u79fb\u5230(ds:[0eh])\u3002(ds:[0eh])=11h\uff0c\u6267\u884cinc ax\u6700\u7ec8ax=3<\/code><\/pre>\n(2)\u4e0b\u9762\u7684\u7a0b\u5e8f\u6267\u884c\u540e\uff0cax\u548cbx\u4e2d\u7684\u6570\u503c\u4e3a\u591a\u5c11\uff1f<\/p>\n<pre><code>assume cs:codesg\nstack segment\n dw 8 dup(0)\nstack ends\ncodesg segment\nstart:\n mov ax,stack\n mov ss,ax\n mov sp,10h\n mov word ptr ss:[0],offset s ;(ss:[0])=1ah\n mov ss:[2],cs ;(ss:[2])=cs\n call dword ptr ss:[0] ;cs\u5165\u6808,ip=19h\u5165\u6808,\u8f6c\u5230cs:1ah\u5904\u6267\u884c\u6307\u4ee4\n ;(ss:[4])=cs,(ss:[6])=ip\n nop\ns: mov ax,offset s ;ax=1ah\n sub ax,ss:[0ch] ;ax<\/strong>=1ah-(ss:[0ch])=1ah-19h=1<\/strong>\n mov bx,cs ;bx=cs\uff1d0c5bh\n sub bx,ss:[0eh] ;bx<\/strong>=cs-cs=0<\/strong>\n mov ax,4c00h\n int 21h\ncodesg ends\nend start\n10.7 call\u548cret\u7684\u914d\u5408\u4f7f\u7528<\/code><\/pre>\n\u5b50\u7a0b\u5e8f\u7684\u6846\u67b6:<\/p>\n\u6807\u53f7:<\/p>\n<pre><code>\u6307\u4ee4\nret<\/code><\/pre>\n\u5177\u6709\u5b50\u7a0b\u5e8f\u7684\u6e90\u7a0b\u5e8f\u6846\u67b6:<\/p>\n<pre><code>assume cs:code\ncode segment<\/code><\/pre>\nmain:;\u4e3b\u7a0b\u5e8f<\/p>\n<pre><code>...\ncall sub1;\u8c03\u7528\u5b50\u7a0b\u5e8f\n...\nmov ax,4c00h\nint 21h\nsub1:\n...\ncall sub2;\u8c03\u7528\u5b50\u7a0b\u5e8f\n...\nret;\u8fd4\u56de\nsub2:\n...\nret;\u8fd4\u56de\ncode ends\nend\n10.8 mul\u6307\u4ee4\nmul\u6307\u4ee4\u4e3a\u4e58\u6cd5\u6307\u4ee4\uff0c\u7528\u6cd5\u5982\u4e0b\n<![if !supportLists]>(1) <![endif]>\u4e24\u4e2a\u4e58\u6570:\u8981\u4e48\u90fd\u662f8\u4f4d\uff0c\u8981\u4e48\u90fd\u662f16\u4f4d\u30028\u4f4d\u4e58\u6cd5\u4e2d\uff0c\u4e00\u4e2a\u4e58\u6570\u653e\u5728AL\u4e2d,\u4e00\u4e2a\u653e\u57288\u4f4d\u5185\u5b58\u5b57\u8282\u5355\u5143\u62168\u4f4dreg\u4e2d\uff1b16\u4f4d\u4e58\u6cd5\u4e2d,\u4e00\u4e2a\u4e58\u6570\u653e\u5728AX\u4e2d,\u53e6\u4e00\u4e2a\u653e\u572816\u4f4dreg\u6216\u5bc4\u5b58\u5668\u4e2d.<\/u><\/u>\n<![if !supportLists]>(2) <![endif]>\u7ed3\u679c:8\u4f4d\u4e58\u6cd5\u5728AX\u4e2d,16\u4f4d\u4e58\u6cd5\u5728DX\u548cAX\u4e2d(DX\u653e\u9ad816\u4f4d,AX\u653e\u4f4e16\u4f4d)<\/u><\/u>\n<![if !supportLists]>(3) <![endif]>\u683c\u5f0f:<\/u><\/u>\nmul reg<\/u><\/u>\nmul \u5185\u5b58\u5355\u5143(\u6ce8\u610f:\u8981\u7528byte ptr\u548cword ptr\u6307\u51fa\u662f8\u4f4d\u8fd8\u662f16\u4f4d\u4e58\u6cd5)<\/u><\/u><\/code><\/pre>\n10.9~10.11 \u6a21\u5757\u5316\u8bbe\u8ba1 & \u9644\u6ce84 \u7528\u6808\u4f20\u9012\u53c2\u6570<\/p>\n1.\u4f20\u9012\u53c2\u6570\u548c\u8fd4\u56de:\u4f7f\u7528\u6307\u5b9a\u7684\u5bc4\u5b58\u5668\u6216\u5185\u5b58\u5355\u5143<\/p>\n2.\u7528\u6808\u4f20\u9012\u53c2\u6570<\/strong><\/strong><\/p>\n\u539f\u7406:\u5c06\u8981\u4f20\u9012\u7ed9\u5b50\u7a0b\u5e8f\u7684\u53c2\u6570\u538b\u5165\u6808\u4e2d,\u5b50\u7a0b\u5e8f\u4ece\u6808\u4e2d\u53d6\u5f97\u53c2\u6570<\/strong><\/strong><\/p>\n\u4e3e\u4f8b:\u8ba1\u7b97(a-b)^3,a\u3001b\u4e3a\u5b57\u578b\u6570\u636e<\/strong><\/strong><\/p>\n<pre><code>difcube:<\/strong><\/strong>\npush bp<\/strong><\/strong>\nmov bp,sp<\/strong><\/strong>\nmov ax,[bp+4]<\/strong>;ax=a<\/strong>[bp+4]=byte a<\/strong><\/strong>\nsub ax,[bp+6]<\/strong>;a=a-b <\/strong>[bp+6]=byte b<\/strong><\/strong>\nmov bp,ax<\/strong><\/strong>\nmul bp<\/strong><\/strong>\nmul bp<\/strong><\/strong>\npop bp<\/strong><\/strong>\nret 4<\/strong><\/strong>\n\u6307\u4ee4ret n\u7684\u542b\u4e49:<\/strong><\/strong>\npop ip<\/strong><\/strong>\nadd sp,n<\/strong><\/strong>\n\u7531\u4e8e\u7528\u6808\u4f20\u9012\u53c2\u6570,\u5728\u8c03\u7528\u65f6\u5411\u6808\u4e2d\u538b\u5165\u53c2\u6570,\u5b50\u7a0b\u5e8f\u5728\u8fd4\u56de\u7684\u65f6\u5019\u53ef\u4ee5\u7528ret n\u5c06\u6808\u9876\u6307\u9488\u6062\u590d\u3002\u8c03\u7528\u4ee5\u4e0a\u7a0b\u5e8f\u7684\u8fc7\u7a0b:<\/strong><\/strong>\nmov ax,1<\/strong><\/strong>\npush ax<\/strong><\/strong>\nmov ax,3<\/strong><\/strong>\npush ax<\/strong><\/strong>\ncall difcube<\/strong><\/strong>\n\u6b64\u65f6\u9700\u6ce8\u610f\u53c2\u6570\u7684\u538b\u6808\u987a\u5e8f<\/strong><\/strong><\/code><\/pre>\n\u793a\u4f8b\uff1aC\u8bed\u8a00\u7f16\u8bd1\u4e3a\u6c47\u7f16<\/strong><\/strong><\/p>\nC\u7a0b\u5e8f<\/strong><\/strong><\/p>\n<pre><code>void add(int,int,int);<\/strong><\/strong>\nint main(void)<\/strong><\/strong>\n{<\/strong><\/strong>\nint a=1;<\/strong><\/strong>\nint b=2;<\/strong><\/strong>\nint c=0;<\/strong><\/strong>\nadd(a,b,c);<\/strong><\/strong>\nc++;<\/strong><\/strong>\n}<\/strong><\/strong>\nvoid add(int a,int b,int c)<\/strong><\/strong>\n{<\/strong><\/strong>\nc=a+b;<\/strong><\/strong>\n}<\/strong><\/strong><\/code><\/pre>\nmain()\u51fd\u6570\u4e0d\u662f\u7a0b\u5e8f\u542f\u52a8\u540e\u6267\u884c\u7684\u7b2c\u4e00\u4e2a\u51fd\u6570\uff0c\u8fd8\u6709\u522b\u7684\u51fd\u6570\u8c03\u7528main()<\/strong><\/strong><\/p>\n<pre><code>\u5c40\u90e8\u53d8\u91cf\u4e5f\u5728\u6808\u4e2d\u5b58\u50a8<\/strong><\/strong>\n\u6c47\u7f16\u7a0b\u5e8f<\/strong><\/strong>\nmain:<\/strong>;int main(void)<\/strong><\/strong>\nmov bp,sp<\/strong><\/strong>\nsub sp,6<\/strong>;\u7ed9\u5c40\u90e8\u53d8\u91cf\u8ba9\u51fa\u7a7a\u95f4<\/strong><\/strong>\nmov word ptr[bp-6],0001<\/strong>;int a=1<\/strong><\/strong>\nmov word ptr[bp-4],0002<\/strong>;int b=2<\/strong><\/strong>\nmov word ptr[bp-2],0000<\/strong>;int c=0<\/strong><\/strong><\/code><\/pre>\n;\u4ee5\u4e0a\u4e3amain()\u7684\u5c40\u90e8\u53d8\u91cfa,b,c<\/strong><\/strong><\/p>\n<pre><code>push [bp-2]<\/strong><\/strong>\npush [bp-4]<\/strong><\/strong>\npush [bp-6]<\/strong><\/strong><\/code><\/pre>\n;\u4f20\u53c2<\/strong><\/strong><\/p>\n<pre><code>call add<\/strong>;add(a,b,c)<\/strong><\/strong>\nadd sp,6<\/strong>;\u6e05\u7406\u8c03\u7528\u7684\u51fd\u6570\u7684\u5c40\u90e8\u53d8\u91cf\u548c\u53c2\u6570<\/strong><\/strong>\ninc word ptr [bp-2]<\/strong>;c++<\/strong><\/strong>\nadd:<\/strong><\/strong>\npush bp<\/strong>;\u5907\u4efdbp<\/strong><\/strong>\nmov bp,sp<\/strong><\/strong>\nmov ax,[bp+4]<\/strong>;AX=a<\/strong><\/strong>\nadd ax,[bp+6]<\/strong>;AX=a+b<\/strong><\/strong>\nmov [bp+8],ax<\/strong>;c=a+b<\/strong><\/strong>\nmov sp,bp<\/strong><\/strong>\npop bp<\/strong>;\u6062\u590dbp<\/strong><\/strong>\nret<\/strong><\/strong><\/code><\/pre>\n10.12 \u5bc4\u5b58\u5668\u51b2\u7a81\u7684\u95ee\u9898<\/p>\n\u89e3\u51b3\u65b9\u6cd5:\u5728\u5b50\u7a0b\u5e8f\u7684\u5f00\u59cb\u5c06\u5b50\u7a0b\u5e8f\u4e2d\u6240\u6709\u7528\u5230\u7684\u5bc4\u5b58\u5668\u4e2d\u7684\u5185\u5bb9\u90fd\u5165\u6808\u4fdd\u5b58\u8d77\u6765,\u5728\u5b50\u7a0b\u5e8f\u8fd4\u56de\u524d\u6062\u590d\u3002<\/p>\n\u5b50\u7a0b\u5e8f\u7684\u6846\u67b6:<\/strong><\/strong><\/p>\n\u5b50\u7a0b\u5e8f:\u5b50\u7a0b\u5e8f\u4e2d\u4f7f\u7528\u7684\u5bc4\u5b58\u5668\u5165\u6808<\/strong><\/strong><\/p>\n<pre><code>\u5b50\u7a0b\u5e8f\u5185\u5bb9<\/strong><\/strong>\n\u5b50\u7a0b\u5e8f\u4e2d\u4f7f\u7528\u7684\u5bc4\u5b58\u5668\u51fa\u6808<\/strong><\/strong>\n\u8fd4\u56de(ret\\retf)<\/strong><\/strong><\/code><\/pre>\n\u793a\u4f8b:\u5c0f\u5199\u8f6c\u5927\u5199\u7a0b\u5e8f:<\/p>\n<pre><code>capital:push cx\npush si\nchange:mov cl,[si]\nmov ch,0<\/code><\/pre>\njcxz ok<\/p>\n<pre><code>and byte ptr[si],11011111b\ninc si\njmp short change\nok:pop si\npop cx\nret<\/code><\/pre>\n\u5b9e\u9a8c10 \u7f16\u5199\u5b50\u7a0b\u5e8f<\/strong><\/strong><\/p>\n<pre><code><![if !supportLists]>1. <![endif]>\u663e\u793a\u5b57\u7b26\u4e32\n\u5b50\u7a0b\u5e8f\u63cf\u8ff0<\/code><\/pre>\n\u540d\u79f0:show_str<\/p>\n\u529f\u80fd:\u5728\u6307\u5b9a\u7684\u4f4d\u7f6e\u4f7f\u7528\u6307\u5b9a\u7684\u989c\u8272,\u663e\u793a\u4e00\u4e2a\u75280\u7ed3\u675f\u7684\u5b57\u7b26\u4e32<\/p>\n\u53c2\u6570:(dh)=\u884c\u53f7(\u53d6\u503c\u8303\u56f40~24),(dl)=\u5217\u53f7(\u53d6\u503c\u8303\u56f40~79)<\/p>\n(cl)=\u989c\u8272,ds:si\u6307\u5411\u5b57\u7b26\u4e32\u9996\u5730\u5740<\/p>\n\u8fd4\u56de:\u65e0<\/p>\nProgram ex-10-1 \u81ea\u4e3b\u89e3\u6cd5<\/p>\n<pre><code>assume cs:<\/strong>code,ds:<\/strong>data,ss:<\/strong>stack data segment db '<\/strong>welcome to masm!'<\/strong>,0 data ends stack segment db 256 dup(<\/strong>0)<\/strong> <\/strong>stack ends code segment start:<\/strong> <\/strong> mov<\/strong> ax,stack mov<\/strong> ss,ax mov<\/strong> sp,256 ;ss:sp=stack:256<\/i> <\/i> mov<\/strong> dh,8 ;row=8<\/i> <\/i> mov<\/strong> dl,3 ;line=3<\/i> <\/i> mov<\/strong> cl,2 ;color=2<\/i> <\/i> mov<\/strong> ax,data mov<\/strong> ds,ax mov<\/strong> si,0 ;str=data:0<\/i> <\/i> call<\/strong> show_str mov<\/strong> ax,4c00h int<\/strong> 21h show_str:<\/strong> <\/strong>;show_str(byte row=(dh),byte line=(dl),<\/i> <\/i>;byte color=(cl),const char* str =(ds:si));<\/i> <\/i>;\u663e\u5b58\u504f\u79fb\u5730\u5740offset_display=row*160+line*2<\/i> <\/i> push<\/strong> ax push<\/strong> bx push<\/strong> cx push<\/strong> dx push<\/strong> si push<\/strong> di push<\/strong> es mov<\/strong> al,dh mov<\/strong> ah,160 mul<\/strong> ah ;AX=row*160<\/i> <\/i> mov<\/strong> bh,0 mov<\/strong> bl,dl ;BX=(word)line<\/i> <\/i> add<\/strong> ax,bx add<\/strong> ax,bx ;AX=offset_display=row*160+line*2<\/i> <\/i> mov<\/strong> di,ax ;DI=offset_display<\/i> <\/i> mov<\/strong> ax,0b800h mov<\/strong> es,ax ;ES=\u663e\u793a\u7f13\u51b2\u533a<\/i> <\/i> mov<\/strong> dl,cl ;DL=color<\/i> <\/i> ;es:di \u6307\u5411\u663e\u5b58\u663e\u793a\u7f13\u51b2\u533a\u7684\u6307\u9488<\/i> <\/i>display:<\/strong> <\/strong> mov<\/strong> ch,0 mov<\/strong> cl,[si] ;CX=(word)(DS:SI)<\/i> <\/i> jcxz<\/strong> ok ;if((cx)==0) return;<\/i> <\/i> mov<\/strong> es:<\/strong>[di],cl ;(ES:DI)=(DS:SI)<\/i> <\/i> mov<\/strong> es:<\/strong>[di+<\/strong>1],dl;(ES:DI+1)=color<\/i> <\/i> add<\/strong> di,2 add<\/strong> si,1 jmp<\/strong> display ok:<\/strong> pop<\/strong> es pop<\/strong> di pop<\/strong> si pop<\/strong> dx pop<\/strong> cx pop<\/strong> bx pop<\/strong> ax ret<\/strong> <\/strong>code ends end start<\/code><\/pre>\nProgram ex-10-2 \u53c2\u8003\u89e3\u6cd5<\/p>\n<img fetchpriority=\"high\" decoding=\"async\" width=\"330\" height=\"166\" src=\"http:\/\/8.129.82.128\/wp-content\/uploads\/2026\/03\/asm202405\u7248\u63d0\u7eb242603.png\" > <\/p>\n<pre><code>;\u6548\u679c\u56fe<\/code><\/pre>\n;\u5728\u5c4f\u5e55\u76848\u884c3\u4f8b\uff0c\u7528\u7eff\u8272\u663e\u793adata\u6bb5\u4e2d\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<pre><code>assume cs:code,ds:data\ndata segment\ndb 'welcome to masm!',0\ndata ends\ncode segment\nstart:mov dh,8\nmov dl,3\nmov cl,2\nmov ax,data\nmov ds,ax\nmov si,0\ncall show_str<\/code><\/pre>\n <\/p>\n<pre><code>mov ax,4c00h\nint 21h\nshow_str:\npush ax\npush bx\npush es\npush si\nmov ax,0b800h\nmov es,ax\nmov ax,160\nmul dh\nmov bx,ax;bx=160*dh\nmov ax,2\nmul dl;ax=dl*2\nadd bx,ax;mov bx,(160*dh+dl*2)\u8bbe\u7f6ees:bx\u6307\u5411\u663e\u5b58\u9996\u5730\u5740\nmov al,cl;\u628a\u989c\u8272cl\u8d4b\u503cal\nmov cl,0\nshow0:\nmov ch,[si]<\/code><\/pre>\njcxz show1;(ds:si)=0\u65f6\uff0c\u8f6c\u5230show1\u6267\u884c<\/p>\n<pre><code>mov es:[bx],ch\nmov es:[bx].1,al\ninc si;ds:si\u6307\u5411\u4e0b\u4e00\u4e2a\u5b57\u7b26\u5730\u5740\nadd bx,2;es:bx\u6307\u5411\u4e0b\u4e00\u4e2a\u663e\u5b58\u5730\u5740\njmp show0\nshow1:\npop si\npop es\npop bx\npop ax\nret<\/code><\/pre>\n <\/p>\n<pre><code>code ends\nend start\n<![if !supportLists]>2. <![endif]>\u89e3\u51b3\u9664\u6cd5\u6ea2\u51fa\u7684\u95ee\u9898<\/code><\/pre>\n\u5982\u679c\u7ed3\u679c\u7684\u5546\u5927\u4e8eAL\u6216AX\u6240\u80fd\u5b58\u50a8\u7684\u6700\u5927\u503c,\u4fbf\u4f1a\u5f15\u53d1CPU\u7684\u4e00\u4e2a\u5185\u90e8\u9519\u8bef\u51fa\u73b0\u9664\u6cd5\u6ea2\u51fa<\/p>\n<pre><code>\u5b50\u7a0b\u5e8f\u63cf\u8ff0<\/code><\/pre>\n\u540d\u79f0:divdw<\/p>\n\u529f\u80fd:\u8fdb\u884c\u4e0d\u4f1a\u6ea2\u51fa\u7684\u9664\u6cd5\u64cd\u4f5c\uff0c\u88ab\u9664\u6570\u4e3adword\u578b,\u9664\u6570\u4e3aword\u578b,\u7ed3\u679c\u4e3adword\u578b<\/p>\n\u53c2\u6570:(ax)=dword\u578b\u6570\u636e\u7684\u4f4e16\u4f4d\uff0c(dx)=dword\u578b\u6570\u636e\u7684\u9ad816\u4f4d\uff0c(cx)=\u9664\u6570<\/p>\n\u8fd4\u56de:(dx)=\u7ed3\u679c\u7684\u9ad816\u4f4d,(ax)=\u7ed3\u679c\u7684\u4f4e16\u4f4d,(cx)=\u4f59\u6570<\/p>\n<pre><code>\u63d0\u793a\nx\/n=int(h\/n)*65536+[rem(h\/n)*65536+l]\/n<\/code><\/pre>\nx:\u88ab\u9664\u6570\uff0c\u8303\u56f4[0,FFFFFFFF]<\/p>\nn:\u9664\u6570,\u8303\u56f4[0,FFFF]<\/p>\nh:x\u9ad816\u4f4d<\/p>\nl:x\u4f4e16\u4f4d<\/p>\nint()\u53d6\u5546<\/p>\nrem()\u53d6\u4f59<\/p>\n\u516c\u5f0f\u7684\u8bc1\u660e:<\/p>\n\u8bc1\u660e\u6cd51:<\/p>\n\u5c06\u8ba1\u7b97 X \/ n \u5206\u89e3\u4e3a\u8ba1\u7b97\uff1a<\/p>\n<pre><code>( H \/ n ) * 65536 + ( L \/ n ) \uff1b H = int ( x \/ 65536 ) \uff1b L = rem ( x \/ 65536 )\nDIV \u6307\u4ee4\u53ea\u80fd\u5f97\u51fa\u4f59\u6570\u548c\u5546\uff0c\u800c\u6211\u4eec\u53ea\u4fdd\u7559\u5546\u3002\u4f59\u6570\u5fc5\u7136\u5c0f\u4e8e\u9664\u6570\uff0c\u4e00\u6b21\u6b63\u786e\u7684\u9664\u6cd5\u8fd0\u7b97\u53ea\u80fd\u4e22\u6389\u4e00\u4e2a\u4f59\u6570\u3002\u6211\u4eec\u867d\u7136\u5728\u5177\u4f53\u5904\u7406\u65f6\u8fdb\u884c\u4e86\u4e24\u6b21\u9664\u6cd5\u8fd0\u7b97 ( H \/ n ) \u548c ( L \/ n ) \uff1b\u4f46\u8fd9\u5b9e\u8d28\u4e0a\u662f\u4e00\u6b21\u9664\u6cd5\u8fd0\u7b97\uff08X \/ n\uff09\u95ee\u9898\u7684\u5206\u89e3\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e3a\u4fdd\u8bc1\u6700\u7ec8\u7ed3\u679c\u7684\u6b63\u786e\uff0c\u4e24\u6b21\u9664\u6cd5\u8fd0\u7b97\u53ea\u80fd\u4e22\u6389\u4e00\u4e2a\u4f59\u6570\u3002<\/code><\/pre>\n\u5728\u8fd9\u4e2a\u95ee\u9898\u4e2d\uff0cH \/ n \u4ea7\u751f\u7684\u4f59\u6570\u662f\u7edd\u5bf9\u4e0d\u80fd\u4e22\u7684\uff0c\u56e0\u4e3a\u4e22\u6389\u4e86\u5b83\uff08\u8bbe\u4e3a r \uff09\u5c31\u76f8\u5f53\u4e8e\u4e22\u6389\u4e86 r * 65536 \u3002<\/p>\n\u90a3\u4e48\u5982\u4f55\u5904\u7406 \uff08 H \/ n \uff09\u4ea7\u751f\u7684\u4f59\u6570\u5462\uff1f<\/p>\n<pre><code>\u6211\u4eec\u77e5\u9053\uff1aH = int ( H \/ n) * n + rem ( H \/ n )\n\u6240\u4ee5\u6709\uff1a\n( H \/ n ) * 65536 + ( L \/ n )\n= [ int ( H \/ n) * n + rem ( H \/ n ) ] \/ n * 65536 + L \/ n\n= int ( H \/ n) * 65536 + rem ( H \/ n ) * 65536 \/ n + L \/ n\n= int ( H \/ n) * 65536 + [ rem ( H \/ n ) * 65536 + L ] \/ n<\/code><\/pre>\n\u73b0\u5728\u8bb2\u8ba1\u7b97X \/ n \u8f6c\u5316\u4e3a\u8ba1\u7b97\uff1a<\/p>\n<pre><code>int ( H \/ n) * 65536 + [ rem ( H \/ n ) * 65536 + L ] \/ n \uff1b\nH = int ( x \/ 65536 ) \uff1bL = rem ( x \/ 65536 ) \n\u5728\u8fd9\u91cc\u8981\u8fdb\u884c\u4e24\u6b21\u9664\u6cd5\u8fd0\u7b97\uff1a<\/code><\/pre>\n\u7b2c\u4e00\u6b21\uff1a H \/ n<\/p>\n\u7b2c\u4e8c\u6b21\uff1a [ rem ( H \/ n ) * 65536 + L ] \/ n<\/p>\n<pre><code>\u6211\u4eec\u77e5\u9053\u7b2c\u4e00\u6b21\u4e0d\u4f1a\u4ea7\u751f\u9664\u6cd5\u6ea2\u51fa\u3002\n\u73b0\u8bc1\u660e\u7b2c\u4e8c\u6b21\uff1a<\/code><\/pre>\n\u2460L \u2264 65535<\/p>\n\u2461rem ( H \/ n ) \u2264 n \u2013 1<\/p>\n\u7531\u2461\u6709\uff1a<\/p>\n\u2462rem ( H \/ n ) * 65536 \u2264 ( n \u2013 1 ) *65536<\/p>\n\u7531\u2460\uff0c\u2462\u6709\uff1a<\/p>\n④rem ( H \/ n ) * 65536 + L \u2264 ( n \u2013 1 ) *65536 + 65535<\/p>\n\u7531④\u6709\uff1a<\/p>\n⑤[ rem ( H \/ n ) * 65536 + L ] \/ n \u2264 [ ( n \u2013 1 ) *65536 + 65535 ] \/ n<\/p>\n\u7531⑤\u6709\uff1a<\/p>\n⑥[ rem ( H \/ n ) * 65536 + L ] \/ n \u2264 65536 \u2013 ( 1 \/ n )<\/p>\n\u6240\u4ee5 [ rem ( H \/ n ) * 65536 + L ] \/ n \u4e0d\u4f1a\u4ea7\u751f\u9664\u6cd5\u6ea2\u51fa\u3002<\/p>\n<pre><code>\u5219\uff1aX \/ n = int ( H \/ n) * 65536 + [ rem ( H \/ n ) * 65536 + L ] \/ n \uff1b\nH = int ( x \/ 65536 ) \uff1bL = rem ( x \/ 65536 ) <\/code><\/pre>\n\u8bc1\u660e\u6cd52:\u6570\u5b66\u8bc1\u660e<\/strong><\/strong><\/p>\n<img decoding=\"async\" width=\"326\" height=\"491\" src=\"http:\/\/8.129.82.128\/wp-content\/uploads\/2026\/03\/asm202405\u7248\u63d0\u7eb244861.png\" ><\/p>\nProgram ex-10-3 \u81ea\u4e3b\u89e3\u6cd5<\/strong><\/strong><\/p>\n<pre><code>assume cs:<\/strong>code,ds:<\/strong>data,ss:<\/strong>stack data segment db 256 dup(<\/strong>0)<\/strong> <\/strong>data ends stack segment db 256 dup(<\/strong>0)<\/strong> <\/strong>stack ends code segment start:<\/strong> <\/strong> mov<\/strong> ax,stack mov<\/strong> ss,ax ;ss=stack<\/i> <\/i> mov<\/strong> sp,256 mov<\/strong> ax,data mov<\/strong> ds,ax ;ds=data<\/i> <\/i> mov<\/strong> ax,4240h;L(16bit)<\/i> <\/i> mov<\/strong> dx,000fh;H(16bit)<\/i> <\/i> mov<\/strong> cx,0ah ;N(16bit)<\/i> <\/i> ;\u8ba1\u7b971000000\/10(F4240h\/0ah)<\/i> <\/i> call<\/strong> divdw mov<\/strong> ax,4c00h int<\/strong> 21h divdw:<\/strong> <\/strong> push<\/strong> si mov<\/strong> si,0 mov<\/strong> [si],ax ;ds:0=l<\/i> <\/i> mov<\/strong> [si+<\/strong>2],dx ;ds:2=h<\/i> <\/i> mov<\/strong> [si+<\/strong>4],cx ;ds:4=n<\/i> <\/i> ;x\/n=int(h\/n)*65536+[rem(h\/n)*65536+l]\/n<\/i> <\/i> ;\u8ba1\u7b97int(h\/n)<\/i> <\/i> ;\u4e0d\u8981\u4e58\u4ee565536!\u76f4\u63a5\u4f5c\u4e3a\u4e00\u4e2a\u53cc\u5b50\u6570\u636e\u9ad816\u4f4d\u5904\u7406<\/i> <\/i> ;int(h\/n)\u662f\u7ed3\u679c\u5f97\u9ad816\u4f4d<\/i> <\/i> mov<\/strong> ax,[si+<\/strong>2] mov<\/strong> dx,0 div<\/strong> word ptr[si+<\/strong>4] mov<\/strong> [si+<\/strong>6],ax ;int(h\/n) \u5546<\/i> <\/i> mov<\/strong> [si+<\/strong>8],dx ;rem(h\/n) \u4f59\u6570<\/i> <\/i> ;\u8ba1\u7b97[rem(h\/n)*65536+l]\/n<\/i> <\/i> mov<\/strong> ax,[si] ;(dx*0FFFFh+ax)=rem(h\/n)*65536+l<\/i> <\/i> div<\/strong> word ptr[si+<\/strong>4] ;ax=[rem(h\/n)*65536+l]\/n,\u4e3a\u7ed3\u679c\u7684\u4f4e16\u4f4d<\/i> <\/i> ;dx\u4e3a\u4f59\u6570,\u79fb\u5165cx<\/i> <\/i> mov<\/strong> cx,dx mov<\/strong> dx,[si+<\/strong>6] pop<\/strong> si ret<\/strong> <\/strong>code ends end start<\/code><\/pre>\nProgram ex-10-4\u53c2\u8003\u89e3\u6cd5<\/p>\n<img decoding=\"async\" width=\"290\" height=\"147\" src=\"http:\/\/8.129.82.128\/wp-content\/uploads\/2026\/03\/asm202405\u7248\u63d0\u7eb245886.png\" align=\"left\" hspace=\"12\" > <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n<pre><code>\u6548\u679c\u56fe<\/code><\/pre>\n;\u5e94\u7528\u4e3e\u4f8b\uff1a\u8ba1\u7b971000000\/10(f4240h\/0ah)<\/strong><\/strong><\/p>\n<pre><code>assume cs:code<\/strong><\/strong>\ncode segment<\/strong><\/strong>\nstart:<\/strong>mov ax,4240h<\/strong><\/strong>\nmov dx,000fh<\/strong><\/strong>\nmov cx,0ah<\/strong><\/strong>\ncall divdw<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>mov ax,4c00h<\/strong><\/strong>\nint 21h<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>divdw:<\/strong><\/strong>\npush si<\/strong><\/strong>\npush bx<\/strong><\/strong>\npush ax<\/strong><\/strong>\nmov ax,dx<\/strong><\/strong>\nmov dx,0<\/strong><\/strong>\ndiv cx<\/strong>;\u88ab\u9664\u6570\u7684\u9ad8\u4f4d\/cx,\u9ad8\u4f4d\u5728ax,\u4f59\u6570\u5728dx<\/strong><\/strong>\nmov si,ax<\/strong><\/strong>\npop ax <\/strong><\/strong>\ndiv cx<\/strong>;(\u88ab\u9664\u6570\u9ad8\u4f4d\u7684\u5546+\u4f4e\u4f4d)\/cx,\u9ad8\u4f4d\u5728ax,\u4f59\u6570\u5728dx<\/strong><\/strong>\nmov cx,dx<\/strong>;\u4f59\u6570\u5165cx<\/strong><\/strong>\nmov dx,si<\/strong>;\u9ad8\u4f4d\u7684\u5546\u5165dx<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>pop bx<\/strong><\/strong>\npop si<\/strong><\/strong>\nret<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>code ends<\/strong><\/strong>\nend start<\/strong>\n\u516c\u5f0fx\/n=int(h\/n)*65536+[rem(h\/n)*65536+l]\/n\u89e3\u6790\uff1a <\/code><\/pre>\n\u5982\u679c\u9ad8\u4f4d\u9664\u6cd5\u6709\u5546\uff0c\u90a3\u4e48\u5546\u5c31\u662f\u7ed3\u679c\u7684\u9ad8\u4f4d\u503c\uff0c\u5982\u679c\u4f1a\u6709\u4f59\u6570\uff0c\u90a3\u4e48\u4f59\u6570\u81ea\u7136\u4e0d\u80fd\u4e22\u5f03\uff0c\u4f59\u6570\u5c31\u4f5c\u4e3a\u4f4e\u4f4d\u9664\u6cd5\u7684dx(\u4e5f\u5c31\u662f\u9ad8\u4f4d\u7684\u88ab\u9664\u6570\uff0c\u56e0\u4e3a\u4ed6\u662f\u4ece\u9ad8\u4f4d\u9664\u6cd5\u4e2d\u4f59\u4e0b\u7684\uff09 <\/p>\n\u505a\u4f4e\u4f4d\u9664\u6cd5\u7684\u65f6\u5019\uff0c\u5c31\u62ff\u4f59\u4e0b\u7684dx+\u4f4e\u4f4d\u6570\u7684ax\u9664\u4ee5\u9664\u6570\uff0c\u4f1a\u5f97\u5230 \u4e00\u4e2a\u4f4e\u4f4d\u7684\u5546 \u548c \u4f59\u6570 <\/p>\n\u9ad8\u4f4d\u7684\u5546+\u4f4e\u4f4d\u6570\u7684\u5546+\u4f59\u6570 \u5c31\u662f\u7ed3\u679c<\/p>\n<pre><code><![if !supportLists]>3. <![endif]>\u6570\u503c\u663e\u793a<\/code><\/pre>\n\u7f16\u7a0b,\u5c06data\u6bb5\u4e2d\u7684\u6570\u636e\u4ee5\u5341\u8fdb\u5236\u5f62\u5f0f\u663e\u793a<\/p>\n<pre><code>\u5b50\u7a0b\u5e8f\u63cf\u8ff0<\/code><\/pre>\n\u540d\u79f0: dtoc<\/p>\n\u529f\u80fd:\u5c06word\u578b\u6570\u636e\u8f6c\u53d8\u4e3a\u8868\u793a\u5341\u8fdb\u5236\u5f62\u5f0f\u7684\u5b57\u7b26\u4e32\uff0c\u5b57\u7b26\u4e32\u4ee50\u7ed3\u5c3e<\/p>\n\u53c2\u6570:(ax)=word\u578b\u6570\u636e<\/p>\n<img loading=\"lazy\" decoding=\"async\" width=\"196\" height=\"156\" src=\"http:\/\/8.129.82.128\/wp-content\/uploads\/2026\/03\/asm202405\u7248\u63d0\u7eb246549.png\" align=\"left\" hspace=\"12\" >ds:si\u6307\u5411\u5b57\u7b26\u4e32\u7684\u9996\u5730\u5740<\/p>\n\u8fd4\u56de:\u65e0<\/p>\n<pre><code>\u63d0\u793a\u4e0e\u5206\u6790<\/code><\/pre>\n\u5341\u8fdb\u5236\u6570\u7801\u5b57\u7b26\u5bf9\u5e94\u7684ASCII\u7801=\u5341\u8fdb\u5236\u6570\u7801\u503c+30H<\/p>\n\u6216\u8005\u7528\u6570\u7801\u503c+’0’\u4e5f\u53ef\u4ee5<\/p>\n\u5f97\u51fa10\u8fdb\u5236\u6570\u6bcf\u4f4d\u7684\u503c\u7684\u65b9\u6cd5<\/p>\n\u6ce8:\u8fd9\u4e0e10\u8fdb\u5236\u6570\u8f6c\u6362\u4e3a\u5176\u4ed6\u8fdb\u5236\u7684\u65b9\u6cd5\u7c7b\u4f3c\uff0c\u8be5\u7528\u6cd5\u76f8\u5f53\u4e8e\u752810\u8fdb\u5236\u8f6c\u636210\u8fdb\u5236<\/p>\n<pre><code>\u6ce8\u610f\u51fa\u6765\u7684\u4f59\u6570\u5e94\u8be5\u5012\u8fc7\u6765\u624d\u662f\u539f\u6765\u7684\u6570\u5b57<\/code><\/pre>\n\u4f7f\u7528C++\u6f14\u793a\u539f\u7406:<\/p>\n<pre><code>#include<<\/strong>iostream><\/strong> <\/strong>using<\/strong> namespace<\/strong> std<\/strong>;<\/strong> <\/strong>int<\/strong> main()<\/strong> <\/strong>{<\/strong> <\/strong> int<\/strong> a=<\/strong>12666;<\/strong> <\/strong> while<\/strong>(<\/strong>a!=<\/strong>0)<\/strong> <\/strong> {<\/strong> <\/strong> cout<<(<\/strong>char<\/strong>)(<\/strong>a%<\/strong>10+<\/strong>'0')<<<\/strong>\" \"<\/strong>;<\/strong> <\/strong> a\/=<\/strong>10;<\/strong> <\/strong> }<\/strong> <\/strong> return<\/strong> 0;<\/strong> <\/strong>}<\/strong><\/code><\/pre>\n\u7ed3\u679c:6 6 6 2 1<\/p>\nProgram ex-10-5 \u81ea\u4e3b\u89e3\u6cd5<\/strong><\/strong><\/p>\n<pre><code>assume cs:<\/strong>code,ss:<\/strong>stack,ds:<\/strong>data stack segment db 256 dup(<\/strong>0)<\/strong> <\/strong>stack ends data segment db 256 dup(<\/strong>0)<\/strong> <\/strong>data ends code segment start:<\/strong> <\/strong> mov<\/strong> ax,stack mov<\/strong> ss,ax mov<\/strong> sp,256 mov<\/strong> ax,data mov<\/strong> ds,ax mov<\/strong> si,0 mov<\/strong> ax,12666 call<\/strong> dtoc mov<\/strong> cl,2 mov<\/strong> dh,8 mov<\/strong> dl,3 call<\/strong> show_str mov<\/strong> ax,4c00h int<\/strong> 21h dtoc:<\/strong> <\/strong>;void dtoc(word data=(ax),const char* str=(ds:si));<\/i> <\/i> push<\/strong> dx push<\/strong> cx push<\/strong> bx push<\/strong> ax push<\/strong> si push<\/strong> di mov<\/strong> di,si ;si\u521d\u503c<\/i> <\/i> mov<\/strong> bx,10 mov<\/strong> dx,0 ;\u6ce8\u610f\u76f4\u63a5\u9664\u4f1a\u6ea2\u51fa!<\/i> <\/i>dt_l1:<\/strong> <\/strong> mov<\/strong> dx,0 div<\/strong> bx ;ax=ax\/10,dx=ax%10;<\/i> <\/i> add<\/strong> dl,'<\/strong>0'<\/strong> ;dl+='0';<\/i> <\/i> mov<\/strong> [si],dl ;ds:si=dl<\/i> <\/i> mov<\/strong> cx,ax inc<\/strong> si jcxz<\/strong> exit_dtoc jmp<\/strong> dt_l1 exit_dtoc:<\/strong> <\/strong> ;\u53cd\u8f6c\u5b57\u7b26\u4e32<\/i> <\/i> mov<\/strong> ax,si sub<\/strong> ax,di ;ax=si-di<\/i> <\/i> mov<\/strong> cx,ax ;ax=\u5b57\u7b26\u6570<\/i> <\/i>reverse_str:<\/strong> <\/strong> ;\u7531\u4e8epush\u548cpop\u64cd\u4f5c\u4e3a\u5b57\u64cd\u4f5c<\/i> <\/i> ;\u56e0\u6b64\u8981\u5c06\u6bcf\u4e2a\u5b57\u7b26\u4ece\u5b57\u8282\u8f6c\u4e3a\u5b57<\/i> <\/i> mov<\/strong> bx,[di] mov<\/strong> bh,0 push<\/strong> bx inc<\/strong> di loop<\/strong> reverse_str sub<\/strong> si,ax ;\u5c06si\u6062\u590d\u4e3a\u521d\u59cb\u503c<\/i> <\/i> mov<\/strong> cx,ax copy_str:<\/strong> <\/strong> pop<\/strong> bx mov<\/strong> [si],bl inc<\/strong> si loop<\/strong> copy_str pop<\/strong> di pop<\/strong> si pop<\/strong> ax pop<\/strong> bx pop<\/strong> cx pop<\/strong> dx ret<\/strong> <\/strong> show_str:<\/strong> <\/strong>......<\/strong> <\/strong>code ends end start<\/code><\/pre>\nProgram ex-10-<\/strong>6<\/strong> <\/strong>\u53c2\u8003<\/strong>\u89e3\u6cd5<\/strong><\/strong><\/p>\n<pre><code>assume cs:code,ds:data<\/strong><\/strong>\ndata segment<\/strong><\/strong>\ndb 10 dup (0)<\/strong><\/strong>\ndata ends<\/strong><\/strong>\ncode segment<\/strong><\/strong>\nstart:<\/strong>mov ax,12666<\/strong><\/strong>\nmov bx,data<\/strong><\/strong>\nmov ds,bx<\/strong><\/strong>\nmov si,0<\/strong>;ds:si\u6307\u5411data\u9996\u5730\u5740<\/strong><\/strong>\ncall dtoc1<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>mov dh,8<\/strong><\/strong>\nmov dl,3<\/strong><\/strong>\nmov cl,2<\/strong><\/strong>\ncall show_str<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>mov ax,4c00h<\/strong><\/strong>\nint 21h<\/strong><\/strong>\ndtoc1:<\/strong>push ax<\/strong><\/strong>\npush bx<\/strong><\/strong>\npush cx<\/strong><\/strong>\npush dx<\/strong><\/strong>\npush si<\/strong><\/strong>\npush di<\/strong><\/strong>\nmov di,0<\/strong><\/strong>\nd10:<\/strong>mov dx,0<\/strong>;\u8bbe\u7f6e\u88ab\u9664\u6570\u9ad8\u4f4d\u4e3a0<\/strong><\/strong>\nmov bx,10<\/strong>;\u9664\u6570\u4e3a10<\/strong><\/strong>\ndiv bx<\/strong><\/strong>\nadd dx,30h<\/strong>;ax\/10\u7684\u4f59\u6570+30h\uff0c\u8f6c\u4e3a\u5b57\u7b26<\/strong><\/strong>\npush dx<\/strong>;\u5b57\u7b26\u5165\u6808<\/strong><\/strong>\ninc di<\/strong>;\u8bb0\u5f55\u5b57\u7b26\u4e2a\u6570<\/strong><\/strong>\nmov cx,ax<\/strong><\/strong><\/code><\/pre>\njcxz d11<\/strong>;\u5f53ax\/10\u7684\u5546=0\u65f6\uff0c\u8f6c\u5230d11\u6267\u884c<\/strong><\/strong><\/p>\n<pre><code>jmp d10<\/strong><\/strong>\nd11:<\/strong>mov cx,di<\/strong><\/strong>\nd12:<\/strong>pop dx<\/strong>;\u5b57\u7b26\u51fa\u6808<\/strong><\/strong>\nmov [si],dl<\/strong><\/strong>\ninc si<\/strong>;ds:si\u6307\u5411\u4e0b\u4e00\u5355\u5143<\/strong><\/strong>\nloop d12<\/strong><\/strong>\nmov dl,0<\/strong><\/strong>\nmov [si],dl<\/strong>;\u8bbe\u7f6e\u7ed3\u5c3e\u7b260<\/strong><\/strong>\npop si<\/strong><\/strong>\npop di<\/strong><\/strong>\npop dx<\/strong><\/strong>\npop cx<\/strong><\/strong>\npop bx<\/strong><\/strong>\npop ax<\/strong><\/strong>\nret<\/strong><\/strong>\nshow_str:<\/strong><\/strong>\npush ax<\/strong><\/strong>\npush bx<\/strong><\/strong>\nmov ax,0b800h<\/strong><\/strong>\nmov es,ax<\/strong><\/strong>\nmov ax,160<\/strong><\/strong>\nmul dh<\/strong><\/strong>\nmov bx,ax<\/strong>;bx=160*dh<\/strong><\/strong>\nmov ax,2<\/strong><\/strong>\nmul dl<\/strong>;ax=dl*2<\/strong><\/strong>\nadd bx,ax<\/strong>;mov bx,(160*dh+dl*2)\u8bbe\u7f6ees:bx\u6307\u5411\u663e\u5b58\u9996\u5730\u5740<\/strong><\/strong>\nmov al,cl<\/strong>;\u628a\u989c\u8272cl\u8d4b\u503cal<\/strong><\/strong>\nmov cl,0<\/strong><\/strong>\nshow0:<\/strong><\/strong>\nmov ch,[si]<\/strong><\/strong><\/code><\/pre>\njcxz show1<\/strong>;(ds:si)=0\u65f6\uff0c\u8f6c\u5230show1\u6267\u884c<\/strong><\/strong><\/p>\n<pre><code>mov es:[bx],ch<\/strong><\/strong>\nmov es:[bx].1,al<\/strong><\/strong>\ninc si<\/strong>;ds:si\u6307\u5411\u4e0b\u4e00\u4e2a\u5b57\u7b26\u5730\u5740<\/strong><\/strong>\nadd bx,2<\/strong>;es:bx\u6307\u5411\u4e0b\u4e00\u4e2a\u663e\u5b58\u5730\u5740<\/strong><\/strong>\njmp show0<\/strong><\/strong>\nshow1:<\/strong><\/strong>\npop bx<\/strong><\/strong>\npop ax<\/strong><\/strong>\nret<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>code ends<\/strong><\/strong>\nend start<\/strong><\/strong><\/code><\/pre>\n\u6539\u8fdb\u7a0b\u5e8f:\u5c06dword\u578b\u6570\u636e\u8f6c\u4e3a\u5b57\u7b26<\/p>\n\u540d\u79f0\uff1adtoc2<\/p>\n\u529f\u80fd\uff1a\u5c06dword\u578b\u6570\u636e\u8f6c\u53d8\u4e3a\u8868\u793a\u5341\u8fdb\u5236\u7684\u5b57\u7b26\u4e32\uff0c\u5b57\u7b26\u4e32\u4ee50\u4e3a\u7ed3\u5c3e\u7b26\u3002<\/p>\n\u53c2\u6570\uff1a(ax)=dword\u578b\u6570\u636e\u7684\u4f4e16\u4f4d\uff1b<\/p>\n (dx)=dword\u578b\u6570\u636e\u7684\u9ad816\u4f4d\uff1b<\/p>\n ds:si\u6307\u5411\u5b57\u7b26\u4e32\u9996\u5730\u5740\u3002<\/p>\n<pre><code>\u8fd4\u56de\uff1a\u65e0\u3002<\/code><\/pre>\nProgram ex-10-7 \u81ea\u4e3b\u89e3\u6cd5<\/strong><\/strong><\/p>\n<pre><code>assume cs:<\/strong>code,ss:<\/strong>stack,ds:<\/strong>data stack segment db 256 dup(<\/strong>0)<\/strong> <\/strong>stack ends data segment db 256 dup(<\/strong>0)<\/strong> <\/strong>data ends code segment start:<\/strong> <\/strong> mov<\/strong> ax,stack mov<\/strong> ss,ax mov<\/strong> sp,256 mov<\/strong> ax,data mov<\/strong> ds,ax mov<\/strong> si,0 ;\u6ce8\u610f\u8fd9\u91cc\u4e0d\u8981\u752810\u8fdb\u5236\u5199!<\/i> <\/i> mov<\/strong> ax,0bf52h mov<\/strong> dx,1h call<\/strong> dtoc2 mov<\/strong> cl,2 mov<\/strong> dh,8 mov<\/strong> dl,3 call<\/strong> show_str mov<\/strong> ax,4c00h int<\/strong> 21h dtoc2:<\/strong> <\/strong>;void dtoc2(dword data=(bx)*65536+(ax),const char* str=(ds:si));<\/i> <\/i> push<\/strong> dx push<\/strong> cx push<\/strong> bx push<\/strong> ax push<\/strong> si push<\/strong> di mov<\/strong> di,si ;si\u521d\u503c<\/i> <\/i> dt_l1:<\/strong> <\/strong> mov<\/strong> cx,10 call<\/strong> divdw ;dx*65536+ax=\u5546,cx=\u4f59\u6570<\/i> <\/i> add<\/strong> cl,'<\/strong>0'<\/strong> ;cl+='0';<\/i> <\/i> mov<\/strong> [si],cl ;ds:si=cl<\/i> <\/i> mov<\/strong> cx,dx jcxz<\/strong> dx_is_0 ;dx==0\u65f6\u7ee7\u7eed\u5224\u65adax\u662f\u5426\u4e3a0<\/i> <\/i> jmp<\/strong> dx_is_not_0 ;dx!=0\u65f6<\/i> <\/i> dx_is_0:<\/strong> <\/strong> mov<\/strong> cx,ax dx_is_not_0:<\/strong> inc<\/strong> si jcxz<\/strong> exit_dtoc ;ax==0\u65f6\u5411\u5916\u8df3\u8f6c,\u5426\u5219\u5411\u4e0b <\/i> <\/i> jmp<\/strong> dt_l1 exit_dtoc:<\/strong> <\/strong> ;\u53cd\u8f6c\u5b57\u7b26\u4e32<\/i> <\/i> mov<\/strong> ax,si sub<\/strong> ax,di ;ax=si-di<\/i> <\/i> mov<\/strong> cx,ax ;ax=\u5b57\u7b26\u6570<\/i> <\/i> reverse_str:<\/strong> <\/strong> ;\u7531\u4e8epush\u548cpop\u64cd\u4f5c\u4e3a\u5b57\u64cd\u4f5c<\/i> <\/i> ;\u56e0\u6b64\u8981\u5c06\u6bcf\u4e2a\u5b57\u7b26\u4ece\u5b57\u8282\u8f6c\u4e3a\u5b57<\/i> <\/i> mov<\/strong> bx,[di] mov<\/strong> bh,0 push<\/strong> bx inc<\/strong> di loop<\/strong> reverse_str sub<\/strong> si,ax ;\u5c06si\u6062\u590d\u4e3a\u521d\u59cb\u503c<\/i> <\/i> mov<\/strong> cx,ax copy_str:<\/strong> <\/strong> pop<\/strong> bx mov<\/strong> [si],bl inc<\/strong> si loop<\/strong> copy_str pop<\/strong> di pop<\/strong> si pop<\/strong> ax pop<\/strong> bx pop<\/strong> cx pop<\/strong> dx ret<\/strong> <\/strong> show_str:<\/strong> <\/strong>......<\/strong> divdw:<\/strong> <\/strong> push<\/strong> si mov<\/strong> si,0 ;\u4e3a\u4e86\u9632\u6b62\u5f71\u54cd\u5230\u5176\u4ed6\u7a0b\u5e8f\u7684\u5185\u5b58,\u5c06\u4f7f\u7528\u7684\u5355\u5143\u5907\u4efd<\/i> <\/i> ;\u89e3\u51b3\u5185\u5b58\u51b2\u7a81\u7684\u65b9\u6cd5:<\/i> <\/i> push<\/strong> [si] push<\/strong> [si+<\/strong>2] push<\/strong> [si+<\/strong>4] push<\/strong> [si+<\/strong>6] push<\/strong> [si+<\/strong>8] mov<\/strong> [si],ax ;ds:0=l<\/i> <\/i> mov<\/strong> [si+<\/strong>2],dx ;ds:2=h<\/i> <\/i> mov<\/strong> [si+<\/strong>4],cx ;ds:4=n<\/i> <\/i> ;x\/n=int(h\/n)*65536+[rem(h\/n)*65536+l]\/n<\/i> <\/i> ;\u8ba1\u7b97int(h\/n)<\/i> <\/i> ;\u4e0d\u8981\u4e58\u4ee565536!\u76f4\u63a5\u4f5c\u4e3a\u4e00\u4e2a\u53cc\u5b50\u6570\u636e\u9ad816\u4f4d\u5904\u7406<\/i> <\/i> ;int(h\/n)\u662f\u7ed3\u679c\u5f97\u9ad816\u4f4d<\/i> <\/i> mov<\/strong> ax,[si+<\/strong>2] mov<\/strong> dx,0 div<\/strong> word ptr[si+<\/strong>4] mov<\/strong> [si+<\/strong>6],ax ;int(h\/n) \u5546<\/i> <\/i> mov<\/strong> [si+<\/strong>8],dx ;rem(h\/n) \u4f59\u6570<\/i> <\/i> ;\u8ba1\u7b97[rem(h\/n)*65536+l]\/n<\/i> <\/i> mov<\/strong> ax,[si] ;(dx*0FFFFh+ax)=rem(h\/n)*65536+l<\/i> <\/i> div<\/strong> word ptr[si+<\/strong>4] ;ax=[rem(h\/n)*65536+l]\/n,\u4e3a\u7ed3\u679c\u7684\u4f4e16\u4f4d<\/i> <\/i> ;dx\u4e3a\u4f59\u6570,\u79fb\u5165cx<\/i> <\/i> mov<\/strong> cx,dx mov<\/strong> dx,[si+<\/strong>6] pop<\/strong> [si+<\/strong>8] pop<\/strong> [si+<\/strong>6] pop<\/strong> [si+<\/strong>4] pop<\/strong> [si+<\/strong>2] pop<\/strong> [si] pop<\/strong> si ret<\/strong> <\/strong>code ends end start<\/code><\/pre>\nProgram ex-10-8 \u53c2\u8003\u89e3\u6cd5<\/strong><\/strong><\/p>\n;\u5e94\u7528\u4e3e\u4f8b\uff1a\u5c06\u6570\u636e2494967295\u4ee5\u5341\u8fdb\u5236\u7684\u5f62\u5f0f\u5728\u5c4f\u5e55\u76848\u884c3\u5217\uff0c\u7528\u7eff\u8272\u663e\u793a\u51fa\u6765\u3002<\/strong><\/strong><\/p>\n<pre><code>assume cs:code,ds:data<\/strong><\/strong>\ndata segment<\/strong><\/strong>\ndb 10 dup (0)<\/strong><\/strong>\ndata ends<\/strong><\/strong>\ncode segment<\/strong><\/strong>\nstart:<\/strong>mov ax,0ffffh<\/strong><\/strong>\nmov dx,0ffffh<\/strong><\/strong>\nmov bx,data<\/strong><\/strong>\nmov ds,bx<\/strong><\/strong>\nmov si,0<\/strong>;ds:si\u6307\u5411\u5b57\u7b26\u4e32\u9996\u5730\u5740<\/strong><\/strong>\ncall dtoc2<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>mov dh,8<\/strong><\/strong>\nmov dl,3<\/strong><\/strong>\nmov cl,2<\/strong><\/strong>\ncall show_str<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>mov ax,4c00h<\/strong><\/strong>\nint 21h<\/strong><\/strong>\ndtoc2:<\/strong><\/strong>\npush ax<\/strong><\/strong>\npush bx<\/strong><\/strong>\npush cx<\/strong><\/strong>\npush dx<\/strong><\/strong>\npush si<\/strong><\/strong>\npush di<\/strong><\/strong>\nmov di,0<\/strong><\/strong>\nd20:<\/strong>mov cx,10<\/strong>;\u9664\u6570\u4e3a10<\/strong><\/strong>\ncall divdw<\/strong><\/strong>\nadd cx,30h<\/strong>;\u4f59\u6570+30h\uff0c\u8f6c\u4e3a\u5b57\u7b26<\/strong><\/strong>\npush cx<\/strong>;\u5b57\u7b26\u5165\u6808<\/strong><\/strong>\ninc di<\/strong>;\u8bb0\u5f55\u5b57\u7b26\u4e2a\u6570<\/strong><\/strong>\nmov cx,ax <\/strong><\/strong><\/code><\/pre>\njcxz d21<\/strong>;\u4f4e\u4f4d\u5546=0\u65f6\uff0c\u8f6c\u5230d21\u68c0\u6d4b\u9ad8\u4f4d\u5546<\/strong><\/strong><\/p>\n<pre><code>jmp d20<\/strong><\/strong>\nd21:<\/strong>mov cx,dx<\/strong><\/strong><\/code><\/pre>\njcxz d22<\/strong>;\u9ad8\u4f4e\u4f4d\u5546\u5168=0\u65f6\uff0c\u8f6c\u5230d22\u6267\u884c<\/strong><\/strong><\/p>\n<pre><code>jmp d20<\/strong><\/strong>\nd22:<\/strong>mov cx,di<\/strong><\/strong>\nd23:<\/strong>pop ax<\/strong>;\u5b57\u7b26\u51fa\u6808<\/strong><\/strong>\nmov [si],al<\/strong><\/strong>\ninc si<\/strong>;ds:si\u6307\u5411\u4e0b\u4e00\u5355\u5143<\/strong><\/strong>\nloop d23<\/strong><\/strong>\nmov al,0<\/strong><\/strong>\nmov [si],al<\/strong>;\u8bbe\u7f6e\u7ed3\u5c3e\u7b260<\/strong><\/strong>\npop di<\/strong><\/strong>\npop si<\/strong><\/strong>\npop dx<\/strong><\/strong>\npop cx<\/strong><\/strong>\npop bx<\/strong><\/strong>\npop ax<\/strong><\/strong>\nret<\/strong><\/strong>\nshow_str:<\/strong><\/strong>\npush ax<\/strong><\/strong>\npush bx<\/strong><\/strong>\nmov ax,0b800h<\/strong><\/strong>\nmov es,ax<\/strong><\/strong>\nmov ax,160<\/strong><\/strong>\nmul dh<\/strong><\/strong>\nmov bx,ax<\/strong>;bx=160*dh<\/strong><\/strong>\nmov ax,2<\/strong><\/strong>\nmul dl<\/strong>;ax=dl*2<\/strong><\/strong>\nadd bx,ax<\/strong>;mov bx,(160*dh+dl*2)\u8bbe\u7f6ees:bx\u6307\u5411\u663e\u5b58\u9996\u5730\u5740<\/strong><\/strong>\nmov al,cl<\/strong>;\u628a\u989c\u8272cl\u8d4b\u503cal<\/strong><\/strong>\nmov cl,0<\/strong><\/strong>\nshow0:<\/strong><\/strong>\nmov ch,[si]<\/strong><\/strong><\/code><\/pre>\njcxz show1<\/strong>;(ds:si)=0\u65f6\uff0c\u8f6c\u5230show1\u6267\u884c<\/strong><\/strong><\/p>\n<pre><code>mov es:[bx],ch<\/strong><\/strong>\nmov es:[bx].1,al<\/strong><\/strong>\ninc si<\/strong>;ds:si\u6307\u5411\u4e0b\u4e00\u4e2a\u5b57\u7b26\u5730\u5740<\/strong><\/strong>\nadd bx,2<\/strong>;es:bx\u6307\u5411\u4e0b\u4e00\u4e2a\u663e\u5b58\u5730\u5740<\/strong><\/strong>\njmp show0<\/strong><\/strong>\nshow1:<\/strong><\/strong>\npop bx<\/strong><\/strong>\npop ax<\/strong><\/strong>\nret<\/strong><\/strong>\ndivdw:<\/strong><\/strong>\npush si<\/strong><\/strong>\npush bx<\/strong><\/strong>\npush ax<\/strong><\/strong>\nmov ax,dx<\/strong><\/strong>\nmov dx,0<\/strong><\/strong>\ndiv cx<\/strong>;\u88ab\u9664\u6570\u7684\u9ad8\u4f4d\/cx<\/strong><\/strong>\nmov si,ax<\/strong><\/strong>\npop ax <\/strong><\/strong>\ndiv cx<\/strong>;(\u88ab\u9664\u6570\u9ad8\u4f4d\u7684\u5546+\u4f4e\u4f4d)\/cx<\/strong><\/strong>\nmov cx,dx<\/strong>;\u4f59\u6570\u5165cx<\/strong><\/strong>\nmov dx,si<\/strong>;\u9ad8\u4f4d\u7684\u5546\u5165dx<\/strong><\/strong>\npop bx<\/strong><\/strong>\npop si<\/strong><\/strong>\nret<\/strong><\/strong>\ncode ends<\/strong><\/strong>\nend start<\/strong><\/strong><\/code><\/pre>\n\u8bfe\u7a0b\u8bbe\u8ba1<\/strong>1<\/strong><\/strong><\/p>\n\u5c06\u5b9e\u9a8c7\u4e2d\u7684Power idea\u516c\u53f8\u7684\u6570\u636e\u6309\u7167\u56fe\u6240\u793a\u7684\u683c\u5f0f\u5728\u5c4f\u5e55\u4e0a\u663e\u793a\u73b0\u6765\u3002<\/p>\n<img loading=\"lazy\" decoding=\"async\" width=\"417\" height=\"212\" src=\"http:\/\/8.129.82.128\/wp-content\/uploads\/2026\/03\/asm202405\u7248\u63d0\u7eb252948.png\" > <\/p>\n<pre><code>\u6548\u679c\u56fe<\/code><\/pre>\nProgram lesson-design-1-1 \u81ea\u5df1\u7684\u89e3\u6cd5<\/strong><\/strong><\/p>\n<pre><code>assume cs:<\/strong>code,ds:<\/strong>data,ss:<\/strong>stack,es:<\/strong>table_ data segment db '<\/strong>1975'<\/strong>,'<\/strong>1976'<\/strong>,'<\/strong>1977'<\/strong>,'<\/strong>1978'<\/strong>,'<\/strong>1979'<\/strong>,'<\/strong>1980'<\/strong>,'<\/strong>1981'<\/strong>,'<\/strong>1982'<\/strong>,'<\/strong>1983'<\/strong> <\/strong> db '<\/strong>1984'<\/strong>,'<\/strong>1985'<\/strong>,'<\/strong>1986'<\/strong>,'<\/strong>1987'<\/strong>,'<\/strong>1988'<\/strong>,'<\/strong>1989'<\/strong>,'<\/strong>1990'<\/strong>,'<\/strong>1991'<\/strong>,'<\/strong>1992'<\/strong> <\/strong> db '<\/strong>1993'<\/strong>,'<\/strong>1994'<\/strong>,'<\/strong>1995'<\/strong> <\/strong> ;\u4ee5\u4e0a\u4e3a21\u5e74\u768421\u4e2a\u5b57\u7b26\u4e32(+84byte)<\/i> <\/i> dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514 dd 345980,590827,803530,1183000,1843000,2759000,3753000,4649000,5937000 ;\u4ee5\u4e0a\u4e3a21\u5e74\u7684\u603b\u6536\u5165\u6570\u636e(+168byte)<\/i> <\/i> dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226 dw 11452,14430,15257,17800 ;\u4ee5\u4e0a\u4e3a21\u5e74\u6bcf\u5e74\u7684\u96c7\u5458\u4eba\u6570<\/i> <\/i>data ends temp segment db 512 dup(<\/strong>0)<\/strong> <\/strong>temp ends stack segment db 256 dup(<\/strong>0)<\/strong> <\/strong>stack ends table_ segment db 21 dup (<\/strong>'<\/strong>year'<\/strong>,0,'<\/strong>summ ne ?? '<\/strong>)<\/strong> <\/strong>table_ ends code segment start:<\/strong> <\/strong> mov<\/strong> ax,data mov<\/strong> ds,ax ;ds=data<\/i> <\/i> mov<\/strong> ax,table_ mov<\/strong> es,ax ;es=table_<\/i> <\/i> mov<\/strong> ax,stack mov<\/strong> ss,ax ;ss=stack<\/i> <\/i> mov<\/strong> sp,256 mov<\/strong> bx,0 mov<\/strong> cx,21 mov<\/strong> di,0 ;\u5199\u5165\u5e74\u4efd<\/i> <\/i> l1:<\/strong> <\/strong> mov<\/strong> ax,[di] mov<\/strong> es:<\/strong>[bx+<\/strong>0],ax mov<\/strong> ax,[di+<\/strong>2] mov<\/strong> es:<\/strong>[bx+<\/strong>2],ax add<\/strong> di,4 ;\u6362\u4e0b\u4e00\u884c<\/i> <\/i> add<\/strong> bx,16 loop<\/strong> l1 ;\u5199\u5165\u6536\u5165<\/i> <\/i> mov<\/strong> bx,0 mov<\/strong> cx,21 l2:<\/strong> <\/strong> mov<\/strong> ax,[di] mov<\/strong> es:<\/strong>[bx+<\/strong>5],ax mov<\/strong> ax,[di+<\/strong>2] mov<\/strong> es:<\/strong>[bx+<\/strong>7],ax add<\/strong> di,4 add<\/strong> bx,16 loop<\/strong> l2 ;\u5199\u5165\u96c7\u5458\u6570<\/i> <\/i> mov<\/strong> bx,0 mov<\/strong> cx,21 l3:<\/strong> <\/strong> mov<\/strong> ax,[di] mov<\/strong> es:<\/strong>[bx+<\/strong>0ah],ax add<\/strong> di,2 add<\/strong> bx,16 loop<\/strong> l3 ;\u8ba1\u7b97\u4eba\u5747\u6536\u5165<\/i> <\/i> mov<\/strong> bx,0 mov<\/strong> cx,21 mov<\/strong> di,84 mov<\/strong> si,0 ;\u7528\u4e8e\u5b9a\u4f4d\u88ab\u9664\u6570<\/i> <\/i> l4:<\/strong> <\/strong> mov<\/strong> dx,[di+<\/strong>2] mov<\/strong> ax,[di] div<\/strong> word ptr[168+<\/strong>si] mov<\/strong> es:<\/strong>[bx+<\/strong>0dh],ax add<\/strong> si,2 add<\/strong> di,4 add<\/strong> bx,16 loop<\/strong> l4 ;\u663e\u793atable<\/i> <\/i> mov<\/strong> ax,table_ mov<\/strong> ds,ax ;ds=table_<\/i> <\/i> mov<\/strong> si,0 ;\u8868\u683c\u6bcf\u4e00\u884c\u7684\u5730\u5740<\/i> <\/i> mov<\/strong> cx,21 mov<\/strong> dh,2 ;\u884c\u53f7<\/i> <\/i>s1:<\/strong> mov<\/strong> dl,20 ;\u6bcf\u6b21\u90fd\u8981\u8fd8\u539f\u5217\u53f7<\/i> <\/i> push<\/strong> cx ;\u663e\u793a\u5e74\u4efd<\/i> <\/i> mov<\/strong> cl,2 call<\/strong> show_str ;str=ds:si<\/i> <\/i> pop<\/strong> cx add<\/strong> si,10h ;\u8868\u683c\u4e0b\u4e00\u884c<\/i> <\/i> inc<\/strong> dh ;\u4e0b\u4e00\u884c<\/i> <\/i> loop<\/strong> s1 mov<\/strong> ax,temp mov<\/strong> ds,ax ;ds=temp<\/i> <\/i> mov<\/strong> si,0 ;ds:si\u5b58\u653e\u5b57\u7b26<\/i> <\/i> mov<\/strong> di,0 ;es:di\u53d6\u6570\u636e<\/i> <\/i> mov<\/strong> cx,21 mov<\/strong> si,0 s2:<\/strong> ;\u5c06\u6536\u5165\u8f6c\u4e3a\u5b57\u7b26<\/i> <\/i> mov<\/strong> ax,es:<\/strong>[di+<\/strong>5] mov<\/strong> dx,es:<\/strong>[di+<\/strong>7] call<\/strong> dtoc2 ;\u5b57\u7b26\u4f4d\u4e8eds:0<\/i> <\/i> ;\u5c06\u96c7\u5458\u6570\u8f6c\u4e3a\u5b57\u7b26<\/i> <\/i> add<\/strong> si,10 mov<\/strong> ax,es:<\/strong>[di+<\/strong>0ah] mov<\/strong> dx,0 call<\/strong> dtoc2 ;\u5b57\u7b26\u4f4d\u4e8eds:10<\/i> <\/i> ;\u5c06\u4eba\u5747\u6536\u5165\u8f6c\u4e3a\u5b57\u7b26<\/i> <\/i> add<\/strong> si,6 mov<\/strong> ax,es:<\/strong>[di+<\/strong>0dh] mov<\/strong> dx,0 call<\/strong> dtoc2 add<\/strong> si,6 add<\/strong> di,16 loop<\/strong> s2 mov<\/strong> dh,2 ;\u884c\u53f7<\/i> <\/i> mov<\/strong> dl,28 ;\u5217\u53f7<\/i> <\/i> mov<\/strong> cx,21 mov<\/strong> si,0 s3:<\/strong> ;\u6253\u5370\u5b57\u7b26<\/i> <\/i> mov<\/strong> dl,28 push<\/strong> cx mov<\/strong> cl,2 call<\/strong> show_str pop<\/strong> cx add<\/strong> si,10 add<\/strong> dl,10 push<\/strong> cx mov<\/strong> cl,2 call<\/strong> show_str pop<\/strong> cx add<\/strong> si,6 add<\/strong> dl,6 push<\/strong> cx mov<\/strong> cl,2 call<\/strong> show_str pop<\/strong> cx add<\/strong> si,6 add<\/strong> dl,6 inc<\/strong> dh loop<\/strong> s3 mov<\/strong> ax,4c00h int<\/strong> 21h dtoc2:<\/strong> <\/strong>;void dtoc2(dword data=(dx)*65536+(ax),const char* str=(ds:si));<\/i> <\/i> push<\/strong> dx push<\/strong> cx push<\/strong> bx push<\/strong> ax push<\/strong> si push<\/strong> di mov<\/strong> di,si ;si\u521d\u503c<\/i> <\/i> dt_l1:<\/strong> <\/strong> mov<\/strong> cx,10 call<\/strong> divdw ;dx*65536+ax=\u5546,cx=\u4f59\u6570<\/i> <\/i> add<\/strong> cl,'<\/strong>0'<\/strong> ;cl+='0';<\/i> <\/i> mov<\/strong> [si],cl ;ds:si=cl<\/i> <\/i> mov<\/strong> cx,dx jcxz<\/strong> dx_is_0 ;dx==0\u65f6\u7ee7\u7eed\u5224\u65adax\u662f\u5426\u4e3a0<\/i> <\/i> jmp<\/strong> dx_is_not_0 ;dx!=0\u65f6<\/i> <\/i> dx_is_0:<\/strong> <\/strong> mov<\/strong> cx,ax dx_is_not_0:<\/strong> inc<\/strong> si jcxz<\/strong> exit_dtoc ;ax==0\u65f6\u5411\u5916\u8df3\u8f6c,\u5426\u5219\u5411\u4e0b <\/i> <\/i> jmp<\/strong> dt_l1 exit_dtoc:<\/strong> <\/strong> ;\u53cd\u8f6c\u5b57\u7b26\u4e32<\/i> <\/i> mov<\/strong> ax,si sub<\/strong> ax,di ;ax=si-di<\/i> <\/i> mov<\/strong> cx,ax ;ax=\u5b57\u7b26\u6570<\/i> <\/i> reverse_str:<\/strong> <\/strong> ;\u7531\u4e8epush\u548cpop\u64cd\u4f5c\u4e3a\u5b57\u64cd\u4f5c<\/i> <\/i> ;\u56e0\u6b64\u8981\u5c06\u6bcf\u4e2a\u5b57\u7b26\u4ece\u5b57\u8282\u8f6c\u4e3a\u5b57<\/i> <\/i> mov<\/strong> bx,[di] mov<\/strong> bh,0 push<\/strong> bx inc<\/strong> di loop<\/strong> reverse_str sub<\/strong> si,ax ;\u5c06si\u6062\u590d\u4e3a\u521d\u59cb\u503c<\/i> <\/i> mov<\/strong> cx,ax copy_str:<\/strong> <\/strong> pop<\/strong> bx mov<\/strong> [si],bl inc<\/strong> si loop<\/strong> copy_str pop<\/strong> di pop<\/strong> si pop<\/strong> ax pop<\/strong> bx pop<\/strong> cx pop<\/strong> dx ret<\/strong> <\/strong> show_str:<\/strong> <\/strong>;void show_str(byte row=(dh),byte line=(dl),<\/i> <\/i>;byte color=(cl),const char* str =(ds:si));<\/i> <\/i>;\u663e\u5b58\u504f\u79fb\u5730\u5740offset_display=row*160+line*2<\/i> <\/i> push<\/strong> ax push<\/strong> bx push<\/strong> cx push<\/strong> dx push<\/strong> si push<\/strong> di push<\/strong> es mov<\/strong> al,dh mov<\/strong> ah,160 mul<\/strong> ah ;AX=row*160<\/i> <\/i> mov<\/strong> bh,0 mov<\/strong> bl,dl ;BX=(word)line<\/i> <\/i> add<\/strong> ax,bx add<\/strong> ax,bx ;AX=offset_display=row*160+line*2<\/i> <\/i> mov<\/strong> di,ax ;DI=offset_display<\/i> <\/i> mov<\/strong> ax,0b800h mov<\/strong> es,ax ;ES=\u663e\u793a\u7f13\u51b2\u533a<\/i> <\/i> mov<\/strong> dl,cl ;DL=color<\/i> <\/i> ;es:di \u6307\u5411\u663e\u5b58\u663e\u793a\u7f13\u51b2\u533a\u7684\u6307\u9488<\/i> <\/i> display:<\/strong> <\/strong> mov<\/strong> ch,0 mov<\/strong> cl,[si] ;CX=(word)(DS:SI)<\/i> <\/i> jcxz<\/strong> ok ;if((cx)==0) return;<\/i> <\/i> mov<\/strong> es:<\/strong>[di],cl ;(ES:DI)=(DS:SI)<\/i> <\/i> mov<\/strong> es:<\/strong>[di+<\/strong>1],dl;(ES:DI+1)=color<\/i> <\/i> add<\/strong> di,2 add<\/strong> si,1 jmp<\/strong> display ok:<\/strong> pop<\/strong> es pop<\/strong> di pop<\/strong> si pop<\/strong> dx pop<\/strong> cx pop<\/strong> bx pop<\/strong> ax ret<\/strong> <\/strong> divdw:<\/strong> <\/strong> push<\/strong> si mov<\/strong> si,0 ;\u4e3a\u4e86\u9632\u6b62\u5f71\u54cd\u5230\u5176\u4ed6\u7a0b\u5e8f\u7684\u5185\u5b58,\u5c06\u4f7f\u7528\u7684\u5355\u5143\u5907\u4efd<\/i> <\/i> ;\u89e3\u51b3\u5185\u5b58\u51b2\u7a81\u7684\u65b9\u6cd5:<\/i> <\/i> push<\/strong> [si] push<\/strong> [si+<\/strong>2] push<\/strong> [si+<\/strong>4] push<\/strong> [si+<\/strong>6] push<\/strong> [si+<\/strong>8] mov<\/strong> [si],ax ;ds:0=l<\/i> <\/i> mov<\/strong> [si+<\/strong>2],dx ;ds:2=h<\/i> <\/i> mov<\/strong> [si+<\/strong>4],cx ;ds:4=n<\/i> <\/i> ;x\/n=int(h\/n)*65536+[rem(h\/n)*65536+l]\/n<\/i> <\/i> ;\u8ba1\u7b97int(h\/n)<\/i> <\/i> ;\u4e0d\u8981\u4e58\u4ee565536!\u76f4\u63a5\u4f5c\u4e3a\u4e00\u4e2a\u53cc\u5b50\u6570\u636e\u9ad816\u4f4d\u5904\u7406<\/i> <\/i> ;int(h\/n)\u662f\u7ed3\u679c\u5f97\u9ad816\u4f4d<\/i> <\/i> mov<\/strong> ax,[si+<\/strong>2] mov<\/strong> dx,0 div<\/strong> word ptr[si+<\/strong>4] mov<\/strong> [si+<\/strong>6],ax ;int(h\/n) \u5546<\/i> <\/i> mov<\/strong> [si+<\/strong>8],dx ;rem(h\/n) \u4f59\u6570<\/i> <\/i> ;\u8ba1\u7b97[rem(h\/n)*65536+l]\/n<\/i> <\/i> mov<\/strong> ax,[si] ;(dx*0FFFFh+ax)=rem(h\/n)*65536+l<\/i> <\/i> div<\/strong> word ptr[si+<\/strong>4] ;ax=[rem(h\/n)*65536+l]\/n,\u4e3a\u7ed3\u679c\u7684\u4f4e16\u4f4d<\/i> <\/i> ;dx\u4e3a\u4f59\u6570,\u79fb\u5165cx<\/i> <\/i> mov<\/strong> cx,dx mov<\/strong> dx,[si+<\/strong>6] pop<\/strong> [si+<\/strong>8] pop<\/strong> [si+<\/strong>6] pop<\/strong> [si+<\/strong>4] pop<\/strong> [si+<\/strong>2] pop<\/strong> [si] pop<\/strong> si ret<\/strong> <\/strong>code ends end start<\/code><\/pre>\nProgram lesson-design-1-2 \u53c2\u8003\u89e3\u6cd5<\/strong><\/strong><\/p>\n<pre><code>assume cs:code,ds:data,es:table\ntable segment\n db '1975','1976','1977','1978','1979','1980','1981','1982','1983'\n db '1984','1985','1986','1987','1988','1989','1990','1991','1992'\n db '1993','1994','1995'\n dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514\n dd 345980,590827,803530,1183000,1843000,2795000,3753000,4649000,5937000\n dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226\n dw 11542,14430,15257,17800\n dw 5,3,42,104,85,210,123,111,105,125,140,136,153,211,199,209,224,239\n dw 260,304,333\ntable ends\ndata segment\n db 32 dup (0)\ndata ends\ncode segment\nstart:mov ax,data\nmov ds,ax\nmov ax,table\nmov es,ax\nmov bx,0\nmov si,0\nmov di,0\nmov cx,21\nmov dh,2\nmov dl,30\ng:push cx\npush dx\nmov ax,es:[bx]\nmov [si],ax\nmov ax,es:[bx].2\nmov [si].2,ax;\u5e74\u4efd\u5165ds:si\nadd si,6\nmov ax,es:[bx].84\nmov dx,es:[bx].86\ncall dtoc2;\u6536\u5165\u8f6c\u6210\u5341\u8fdb\u5236\u5b57\u7b26\u5165ds:si\nadd si,10\nmov ax,es:[di].168\nmov dx,0\ncall dtoc2;\u4eba\u5458\u6570\u8f6c\u6210\u5341\u8fdb\u5236\u5b57\u7b26\u5165ds:si\nadd si,6\nmov ax,es:[di].210\nmov dx,0\ncall dtoc2;\u4eba\u5747\u6536\u5165\u8f6c\u6210\u5341\u8fdb\u5236\u5b57\u7b26\u5165ds:si\nmov si,0;\u8bbe\u7f6eds:si\u6307\u5411\u9700\u663e\u793a\u5b57\u7b26\u9996\u5730\u5740\nb:mov cx,29\nc:push cx\nmov cl,[si]<\/code><\/pre>\njcxz f;(ds:si)=0\u8f6c\u5230f\u6267\u884c<\/p>\n<pre><code>d:inc si\npop cx\nloop c\ninc si\nmov al,0\nmov [si],al;\u8bbe\u7f6e\u7ed3\u5c3e\u7b260\nmov si,0;\u8bbe\u7f6eds:si\u6307\u5411\u9700\u663e\u793a\u5b57\u7b26\u9996\u5730\u5740\npop dx\nmov cl,2\ncall show_str\nadd bx,4;dword\u6570\u636e\u6307\u5411\u4e0b\u4e00\u6570\u636e\u5355\u5143\nadd di,2;word\u6570\u636e\u6307\u5411\u4e0b\u4e00\u6570\u636e\u5355\u5143\nadd dh,1;\u6307\u5411\u663e\u5b58\u4e0b\u4e00\u884c\npop cx\nloop g\nmov ax,4c00h\nint 21h\nf:mov al,20h\nmov [si],al;(ds:si)=0\u7684\u6570\u636e\u6539\u6210\u7a7a\u683c\njmp d\ndtoc2:\npush ax\npush bx\npush cx\npush dx\npush si\npush di\nmov di,0\nd20:mov cx,10;\u9664\u6570\u4e3a10\ncall divdw\nadd cx,30h;\u4f59\u6570+30h\uff0c\u8f6c\u4e3a\u5b57\u7b26\npush cx;\u5b57\u7b26\u5165\u6808\ninc di;\u8bb0\u5f55\u5b57\u7b26\u4e2a\u6570\nmov cx,ax <\/code><\/pre>\njcxz d21;\u4f4e\u4f4d\u5546=0\u65f6\uff0c\u8f6c\u5230d21\u68c0\u6d4b\u9ad8\u4f4d\u5546<\/p>\n<pre><code>jmp d20\nd21:mov cx,dx<\/code><\/pre>\njcxz d22;\u9ad8\u4f4e\u4f4d\u5546\u5168=0\u65f6\uff0c\u8f6c\u5230d22\u6267\u884c<\/p>\n<pre><code>jmp d20\nd22:mov cx,di\nd23:pop ax;\u5b57\u7b26\u51fa\u6808\nmov [si],al\ninc si;ds:si\u6307\u5411\u4e0b\u4e00\u5355\u5143\nloop d23\nmov al,0\nmov [si],al;\u8bbe\u7f6e\u7ed3\u5c3e\u7b260\npop di\npop si\npop dx\npop cx\npop bx\npop ax\nret\ndivdw:\npush si\npush bx\npush ax\nmov ax,dx\nmov dx,0\ndiv cx;\u88ab\u9664\u6570\u7684\u9ad8\u4f4d\/cx\nmov si,ax\npop ax \ndiv cx;(\u88ab\u9664\u6570\u9ad8\u4f4d\u7684\u5546+\u4f4e\u4f4d)\/cx\nmov cx,dx;\u4f59\u6570\u5165cx\nmov dx,si;\u9ad8\u4f4d\u7684\u5546\u5165dx\npop bx\npop si\nret\nshow_str:\npush ax\npush bx\npush es\npush si\nmov ax,0b800h\nmov es,ax\nmov ax,160\nmul dh\nmov bx,ax;bx=160*dh\nmov ax,2\nmul dl;ax=dl*2\nadd bx,ax;mov bx,(160*dh+dl*2)\u8bbe\u7f6ees:bx\u6307\u5411\u663e\u5b58\u9996\u5730\u5740\nmov al,cl;\u628a\u989c\u8272cl\u8d4b\u503cal\nmov cl,0\nshow0:\nmov ch,[si]<\/code><\/pre>\njcxz show1;(ds:si)=0\u65f6\uff0c\u8f6c\u5230show1\u6267\u884c<\/p>\n<pre><code>mov es:[bx],ch\nmov es:[bx].1,al\ninc si;ds:si\u6307\u5411\u4e0b\u4e00\u4e2a\u5b57\u7b26\u5730\u5740\nadd bx,2;es:bx\u6307\u5411\u4e0b\u4e00\u4e2a\u663e\u5b58\u5730\u5740\njmp show0\nshow1:\npop si\npop es\npop bx\npop ax\nret\ncode ends\nend start<\/code><\/pre>\n<![if !supportLists]>\n <\/div>\n<\/body>\n<\/html>\n\n","protected":false},"excerpt":{"rendered":"\u7b2c\u5341\u7ae0 CALL\u548cRET\u6307\u4ee4 &#821 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{"id":504,"date":"2026-03-07T19:57:55","date_gmt":"2026-03-07T11:57:55","guid":{"rendered":"http:\/\/8.129.82.128\/?p=504"},"modified":"2026-03-07T19:57:55","modified_gmt":"2026-03-07T11:57:55","slug":"8086%e6%b1%87%e7%bc%9610","status":"publish","type":"post","link":"http:\/\/8.129.82.128\/?p=504","title":{"rendered":"8086\u6c47\u7f16#10"},"content":{"rendered":"\n\n\n\n \n \n \u7b2c\u5341\u7ae0 CALL\u548cRET\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\u5341\u7ae0 CALL\u548cRET\u6307\u4ee4<\/h1>\n <pre><code>\u7b2c\u5341\u7ae0 CALL\u548cRET\u6307\u4ee4<\/strong><\/strong>\n10.1 ret\u548cretf\nret\u7528\u6808\u4e2d\u7684\u6570\u636e\u4fee\u6539IP\u7684\u5185\u5bb9,\u5b9e\u73b0\u8fd1\u8f6c\u79fb<\/u>\nret\u6307\u4ee4\u6267\u884c\u8fc7\u7a0b\u76f8\u5f53\u4e8e:pop IP\nretf\u7528\u6808\u4e2d\u7684\u6570\u636e\u4fee\u6539CS\u548cIP\u4e2d\u7684\u5185\u5bb9\uff0c\u5b9e\u73b0\u8fdc\u8f6c\u79fb<\/u><\/u>\nretf\u6307\u4ee4\u6267\u884c\u8fc7\u7a0b\u76f8\u5f53\u4e8e:\npop IP\npop CS<\/code><\/pre>\n\u68c0\u6d4b\u70b910.1 <\/p>\n<pre><code>\u8865\u5168\u7a0b\u5e8f\uff0c\u5b9e\u73b0\u4ece\u5185\u5b581000\uff1a0000\u5904\u5f00\u59cb\u6267\u884c\u6307\u4ee4\u3002\nassume cs:code\nstack segment\ndb 16 dup (0)\nstack ends\ncode segment\nstart:mov ax,stack\nmov ss,ax\nmov sp,16\nmov ax, 1000h <\/u><\/u>\npush ax\nmov ax, 0 <\/u>\npush ax\nretf\ncode ends\nend start\n10.2~10.6 call\u6307\u4ee4\n<![if !supportLists]>1. <![endif]>\u6267\u884ccall\u6307\u4ee4\u65f6,\u8fdb\u884c\u4e24\u6b65\u64cd\u4f5c:\n<![if !supportLists]>(1) <![endif]>\u5c06\u5f53\u524d\u7684IP\u6216CS\u548cIP\u538b\u5165\u6808\u4e2d\n<![if !supportLists]>(2) <![endif]>\u8f6c\u79fb\ncall\u4e0d\u80fd\u5b9e\u73b0\u77ed\u8f6c\u79fb\uff0c\u5176\u5b9e\u73b0\u8f6c\u79fb\u7684\u65b9\u6cd5\u548cjmp\u6307\u4ee4\u539f\u7406\u76f8\u540c<\/u><\/u>\n<![if !supportLists]>2. <![endif]>\u4f9d\u636e\u4f4d\u79fb\u8fdb\u884c\u8f6c\u79fb\u7684call\u6307\u4ee4\ncall \u6807\u53f7<\/strong><\/strong>\n\u6b64\u6307\u4ee4\u5c06\u5f53\u524dIP\u538b\u5165\u6808\u4e2d,\u5e76\u8f6c\u5230\u6807\u53f7\u5904\u6267\u884c\u6307\u4ee4<\/u>\uff0c\u76f8\u5f53\u4e8e\u8fdb\u884c:\npush IP\njmp near ptr \u6807\u53f7\n\u5728call\u6307\u4ee4\u7684\u673a\u5668\u7801\u4e2d\u6ca1\u6709\u8f6c\u79fb\u7684\u76ee\u7684\u5730\u5740,\u800c\u662f\u4f4d\u79fb\n\u6ce8\u610f:\u8bfb\u53d6\u4e00\u6761\u6307\u4ee4\u540e,IP\u4e2d\u7684\u503c\u81ea\u52a8\u589e\u52a0,\u518d\u6267\u884c\u8bfb\u53d6\u7684\u6307\u4ee4<\/u><\/strong><\/u><\/strong><\/code><\/pre>\n\u68c0\u6d4b\u70b910.2<\/p>\n\u4e0b\u9762\u7684\u7a0b\u5e8f\u6267\u884c\u540e\uff0cax\u4e2d\u7684\u6570\u503c\u4e3a\u591a\u5c11\uff1f<\/p>\n<pre><code>\u5185\u5b58\u5730\u5740 \u673a\u5668\u7801 \u6c47\u7f16\u6307\u4ee4 \u6267\u884c\u540e\u60c5\u51b5\n1000:0 b8 00 00 mov ax,0 ax=0 ip\u6307\u54111000:3\n1000:3 e8 01 00 call s pop ip ip\u6307\u54111000:7\n1000:6 40 inc ax\n1000:7 58 s:pop ax ax=6\n\u7528debug\u8fdb\u884c\u8ddf\u8e2a\u786e\u8ba4\uff0c\u201ccall \u6807\u53f7\u201d\u662f\u5c06\u8be5\u6307\u4ee4\u540e\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u5730\u5740\u5165\u6808\uff0c\u518d\u8f6c\u5230\u6807\u53f7\u5904\u6267\u884c\u6307\u4ee4\u3002\n<![if !supportLists]>3. <![endif]>\u8f6c\u79fb\u7684\u76ee\u7684\u5730\u5740\u5728\u6307\u4ee4\u4e2d\u7684call\u6307\u4ee4\ncall far ptr \u6807\u53f7<\/strong><\/strong>\n\u8be5\u6307\u4ee4\u5b9e\u73b0\u6bb5\u95f4\u8f6c\u79fb\uff0c\u76f8\u5f53\u4e8e:\npush CS\npush IP\njmp far ptr \u6807\u53f7<\/code><\/pre>\n\u68c0\u6d4b\u70b910.3<\/p>\n\u4e0b\u9762\u7684\u7a0b\u5e8f\u6267\u884c\u540e\uff0cax\u4e2d\u7684\u6570\u503c\u4e3a\u591a\u5c11\uff1f <\/p>\n<pre><code>\u5185\u5b58\u5730\u5740 \u673a\u5668\u7801 \u6c47\u7f16\u6307\u4ee4 \u6267\u884c\u540e\u60c5\u51b5 \n1000:0 b8 00 00 mov ax,0 ax=0,ip\u6307\u54111000:3 \n1000:3 9a 09 00 00 10 call far ptr s pop cs,pop ip,ip\u6307\u54111000:9 \n1000:8 40 inc ax \n1000:9 58 s:pop ax ax=8h \n add ax,ax ax=10h \n pop bx bx=1000h \n add ax,bx ax=1010h \n\u7528debug\u8fdb\u884c\u8ddf\u8e2a\u786e\u8ba4\uff0c\u201ccall far ptr s\u201d\u662f\u5148\u5c06\u8be5\u6307\u4ee4\u540e\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u6bb5\u5730\u5740cs=1000h\u5165\u6808\uff0c\u518d\u5c06\u504f\u79fb\u5730\u5740ip=8h\u5165\u6808\uff0c\u6700\u540e\u8f6c\u5230\u6807\u53f7\u5904\u6267\u884c\u6307\u4ee4\u3002 <\/code><\/pre>\n\u51fa\u6808\u65f6\uff0c\u6839\u636e\u6808\u5148\u8fdb\u540e\u51fa\u7684\u539f\u5219\uff0c\u5148\u51fa\u7684\u4e3aip\uff1d8h\uff0c\u540e\u51fa\u7684\u4e3acs\uff1d1000h<\/p>\n<pre><code><![if !supportLists]>4. <![endif]>\u8f6c\u79fb\u5730\u5740\u5728\u5bc4\u5b58\u5668\u4e2d\u7684call\u6307\u4ee4\ncall <\/strong> 16\u4f4dreg<\/strong><\/strong><\/code><\/pre>\n\u76f8\u5f53\u4e8e:<\/p>\n<pre><code>push IP\njmp 16\u4f4dreg<\/code><\/pre>\n\u68c0\u6d4b\u70b910.4<\/p>\n\u4e0b\u9762\u7684\u7a0b\u5e8f\u6267\u884c\u540e\uff0cax\u4e2d\u7684\u6570\u503c\u4e3a\u591a\u5c11\uff1f<\/p>\n<pre><code>\u5185\u5b58\u5730\u5740 \u673a\u5668\u7801 \u6c47\u7f16\u6307\u4ee4 \u6267\u884c\u540e\u60c5\u51b5\n1000:0 b8 06 00 mov ax,6 ax=6,ip\u6307\u54111000:3\n1000:3 ff d0 call ax pop ip,ip\u6307\u54111000:6\n1000:5 40 inc ax\n1000:6 58 mov bp,sp bp=sp=fffeh\n add ax,[bp] ax=[6+ds:(fffeh)]=6+5=0bh\n\u7528debug\u8fdb\u884c\u8ddf\u8e2a\u786e\u8ba4\uff0c\u201ccall ax(16\u4f4dreg)\u201d\u662f\u5148\u5c06\u8be5\u6307\u4ee4\u540e\u7684\u7b2c\u4e00\u4e2a\u5b57\u8282\u504f\u79fb\u5730\u5740ip\u5165\u6808\uff0c\u518d\u8f6c\u5230\u504f\u79fb\u5730\u5740\u4e3aax(16\u4f4dreg)\u5904\u6267\u884c\u6307\u4ee4\u3002\n<![if !supportLists]>5. <![endif]>\u8f6c\u79fb\u5730\u5740\u5728\u5185\u5b58\u4e2d\u7684call\u6307\u4ee4\n<![if !supportLists]>(1) <![endif]>call word ptr \u5185\u5b58\u5355\u5143\u5730\u5740<\/strong><\/strong><\/code><\/pre>\n\u76f8\u5f53\u4e8e:<\/p>\n<pre><code>push IP\njmp word ptr \u5185\u5b58\u5355\u5143\u5730\u5740\n<![if !supportLists]>(2) <![endif]>call dword ptr \u5185\u5b58\u5355\u5143\u5730\u5740<\/strong><\/strong><\/code><\/pre>\n\u76f8\u5f53\u4e8e:<\/p>\n<pre><code>push CS\npush IP\njmp dword ptr \u5185\u5b58\u5355\u5143\u5730\u5740<\/code><\/pre>\n\u68c0\u6d4b\u70b910.5<\/p>\n(1)\u4e0b\u9762\u7684\u7a0b\u5e8f\u6267\u884c\u540e\uff0cax\u4e2d\u7684\u6570\u503c\u4e3a\u591a\u5c11\uff1f<\/p>\n<pre><code>assume cs:code\nstack segment\ndw 8 dup (0)\nstack ends\ncode segment\nstart:mov ax,stack\nmov ss,ax\nmov sp,16\nmov ds,ax\nmov ax,0\ncall word ptr ds:[0eh]\ninc ax\ninc ax\ninc ax\nmov ax,4c00h\nint 21h\ncode ends\nend start\n\u6267\u884ccall word ptr ds:[0eh]\u6307\u4ee4\u65f6\uff0c\u5148cs\u5165\u6808\uff0c\u518dip=11\u5165\u6808\uff0c\u6700\u540eip\u8f6c\u79fb\u5230(ds:[0eh])\u3002(ds:[0eh])=11h\uff0c\u6267\u884cinc ax\u6700\u7ec8ax=3<\/code><\/pre>\n(2)\u4e0b\u9762\u7684\u7a0b\u5e8f\u6267\u884c\u540e\uff0cax\u548cbx\u4e2d\u7684\u6570\u503c\u4e3a\u591a\u5c11\uff1f<\/p>\n<pre><code>assume cs:codesg\nstack segment\n dw 8 dup(0)\nstack ends\ncodesg segment\nstart:\n mov ax,stack\n mov ss,ax\n mov sp,10h\n mov word ptr ss:[0],offset s ;(ss:[0])=1ah\n mov ss:[2],cs ;(ss:[2])=cs\n call dword ptr ss:[0] ;cs\u5165\u6808,ip=19h\u5165\u6808,\u8f6c\u5230cs:1ah\u5904\u6267\u884c\u6307\u4ee4\n ;(ss:[4])=cs,(ss:[6])=ip\n nop\ns: mov ax,offset s ;ax=1ah\n sub ax,ss:[0ch] ;ax<\/strong>=1ah-(ss:[0ch])=1ah-19h=1<\/strong>\n mov bx,cs ;bx=cs\uff1d0c5bh\n sub bx,ss:[0eh] ;bx<\/strong>=cs-cs=0<\/strong>\n mov ax,4c00h\n int 21h\ncodesg ends\nend start\n10.7 call\u548cret\u7684\u914d\u5408\u4f7f\u7528<\/code><\/pre>\n\u5b50\u7a0b\u5e8f\u7684\u6846\u67b6:<\/p>\n\u6807\u53f7:<\/p>\n<pre><code>\u6307\u4ee4\nret<\/code><\/pre>\n\u5177\u6709\u5b50\u7a0b\u5e8f\u7684\u6e90\u7a0b\u5e8f\u6846\u67b6:<\/p>\n<pre><code>assume cs:code\ncode segment<\/code><\/pre>\nmain:;\u4e3b\u7a0b\u5e8f<\/p>\n<pre><code>...\ncall sub1;\u8c03\u7528\u5b50\u7a0b\u5e8f\n...\nmov ax,4c00h\nint 21h\nsub1:\n...\ncall sub2;\u8c03\u7528\u5b50\u7a0b\u5e8f\n...\nret;\u8fd4\u56de\nsub2:\n...\nret;\u8fd4\u56de\ncode ends\nend\n10.8 mul\u6307\u4ee4\nmul\u6307\u4ee4\u4e3a\u4e58\u6cd5\u6307\u4ee4\uff0c\u7528\u6cd5\u5982\u4e0b\n<![if !supportLists]>(1) <![endif]>\u4e24\u4e2a\u4e58\u6570:\u8981\u4e48\u90fd\u662f8\u4f4d\uff0c\u8981\u4e48\u90fd\u662f16\u4f4d\u30028\u4f4d\u4e58\u6cd5\u4e2d\uff0c\u4e00\u4e2a\u4e58\u6570\u653e\u5728AL\u4e2d,\u4e00\u4e2a\u653e\u57288\u4f4d\u5185\u5b58\u5b57\u8282\u5355\u5143\u62168\u4f4dreg\u4e2d\uff1b16\u4f4d\u4e58\u6cd5\u4e2d,\u4e00\u4e2a\u4e58\u6570\u653e\u5728AX\u4e2d,\u53e6\u4e00\u4e2a\u653e\u572816\u4f4dreg\u6216\u5bc4\u5b58\u5668\u4e2d.<\/u><\/u>\n<![if !supportLists]>(2) <![endif]>\u7ed3\u679c:8\u4f4d\u4e58\u6cd5\u5728AX\u4e2d,16\u4f4d\u4e58\u6cd5\u5728DX\u548cAX\u4e2d(DX\u653e\u9ad816\u4f4d,AX\u653e\u4f4e16\u4f4d)<\/u><\/u>\n<![if !supportLists]>(3) <![endif]>\u683c\u5f0f:<\/u><\/u>\nmul reg<\/u><\/u>\nmul \u5185\u5b58\u5355\u5143(\u6ce8\u610f:\u8981\u7528byte ptr\u548cword ptr\u6307\u51fa\u662f8\u4f4d\u8fd8\u662f16\u4f4d\u4e58\u6cd5)<\/u><\/u><\/code><\/pre>\n10.9~10.11 \u6a21\u5757\u5316\u8bbe\u8ba1 & \u9644\u6ce84 \u7528\u6808\u4f20\u9012\u53c2\u6570<\/p>\n1.\u4f20\u9012\u53c2\u6570\u548c\u8fd4\u56de:\u4f7f\u7528\u6307\u5b9a\u7684\u5bc4\u5b58\u5668\u6216\u5185\u5b58\u5355\u5143<\/p>\n2.\u7528\u6808\u4f20\u9012\u53c2\u6570<\/strong><\/strong><\/p>\n\u539f\u7406:\u5c06\u8981\u4f20\u9012\u7ed9\u5b50\u7a0b\u5e8f\u7684\u53c2\u6570\u538b\u5165\u6808\u4e2d,\u5b50\u7a0b\u5e8f\u4ece\u6808\u4e2d\u53d6\u5f97\u53c2\u6570<\/strong><\/strong><\/p>\n\u4e3e\u4f8b:\u8ba1\u7b97(a-b)^3,a\u3001b\u4e3a\u5b57\u578b\u6570\u636e<\/strong><\/strong><\/p>\n<pre><code>difcube:<\/strong><\/strong>\npush bp<\/strong><\/strong>\nmov bp,sp<\/strong><\/strong>\nmov ax,[bp+4]<\/strong>;ax=a<\/strong>[bp+4]=byte a<\/strong><\/strong>\nsub ax,[bp+6]<\/strong>;a=a-b <\/strong>[bp+6]=byte b<\/strong><\/strong>\nmov bp,ax<\/strong><\/strong>\nmul bp<\/strong><\/strong>\nmul bp<\/strong><\/strong>\npop bp<\/strong><\/strong>\nret 4<\/strong><\/strong>\n\u6307\u4ee4ret n\u7684\u542b\u4e49:<\/strong><\/strong>\npop ip<\/strong><\/strong>\nadd sp,n<\/strong><\/strong>\n\u7531\u4e8e\u7528\u6808\u4f20\u9012\u53c2\u6570,\u5728\u8c03\u7528\u65f6\u5411\u6808\u4e2d\u538b\u5165\u53c2\u6570,\u5b50\u7a0b\u5e8f\u5728\u8fd4\u56de\u7684\u65f6\u5019\u53ef\u4ee5\u7528ret n\u5c06\u6808\u9876\u6307\u9488\u6062\u590d\u3002\u8c03\u7528\u4ee5\u4e0a\u7a0b\u5e8f\u7684\u8fc7\u7a0b:<\/strong><\/strong>\nmov ax,1<\/strong><\/strong>\npush ax<\/strong><\/strong>\nmov ax,3<\/strong><\/strong>\npush ax<\/strong><\/strong>\ncall difcube<\/strong><\/strong>\n\u6b64\u65f6\u9700\u6ce8\u610f\u53c2\u6570\u7684\u538b\u6808\u987a\u5e8f<\/strong><\/strong><\/code><\/pre>\n\u793a\u4f8b\uff1aC\u8bed\u8a00\u7f16\u8bd1\u4e3a\u6c47\u7f16<\/strong><\/strong><\/p>\nC\u7a0b\u5e8f<\/strong><\/strong><\/p>\n<pre><code>void add(int,int,int);<\/strong><\/strong>\nint main(void)<\/strong><\/strong>\n{<\/strong><\/strong>\nint a=1;<\/strong><\/strong>\nint b=2;<\/strong><\/strong>\nint c=0;<\/strong><\/strong>\nadd(a,b,c);<\/strong><\/strong>\nc++;<\/strong><\/strong>\n}<\/strong><\/strong>\nvoid add(int a,int b,int c)<\/strong><\/strong>\n{<\/strong><\/strong>\nc=a+b;<\/strong><\/strong>\n}<\/strong><\/strong><\/code><\/pre>\nmain()\u51fd\u6570\u4e0d\u662f\u7a0b\u5e8f\u542f\u52a8\u540e\u6267\u884c\u7684\u7b2c\u4e00\u4e2a\u51fd\u6570\uff0c\u8fd8\u6709\u522b\u7684\u51fd\u6570\u8c03\u7528main()<\/strong><\/strong><\/p>\n<pre><code>\u5c40\u90e8\u53d8\u91cf\u4e5f\u5728\u6808\u4e2d\u5b58\u50a8<\/strong><\/strong>\n\u6c47\u7f16\u7a0b\u5e8f<\/strong><\/strong>\nmain:<\/strong>;int main(void)<\/strong><\/strong>\nmov bp,sp<\/strong><\/strong>\nsub sp,6<\/strong>;\u7ed9\u5c40\u90e8\u53d8\u91cf\u8ba9\u51fa\u7a7a\u95f4<\/strong><\/strong>\nmov word ptr[bp-6],0001<\/strong>;int a=1<\/strong><\/strong>\nmov word ptr[bp-4],0002<\/strong>;int b=2<\/strong><\/strong>\nmov word ptr[bp-2],0000<\/strong>;int c=0<\/strong><\/strong><\/code><\/pre>\n;\u4ee5\u4e0a\u4e3amain()\u7684\u5c40\u90e8\u53d8\u91cfa,b,c<\/strong><\/strong><\/p>\n<pre><code>push [bp-2]<\/strong><\/strong>\npush [bp-4]<\/strong><\/strong>\npush [bp-6]<\/strong><\/strong><\/code><\/pre>\n;\u4f20\u53c2<\/strong><\/strong><\/p>\n<pre><code>call add<\/strong>;add(a,b,c)<\/strong><\/strong>\nadd sp,6<\/strong>;\u6e05\u7406\u8c03\u7528\u7684\u51fd\u6570\u7684\u5c40\u90e8\u53d8\u91cf\u548c\u53c2\u6570<\/strong><\/strong>\ninc word ptr [bp-2]<\/strong>;c++<\/strong><\/strong>\nadd:<\/strong><\/strong>\npush bp<\/strong>;\u5907\u4efdbp<\/strong><\/strong>\nmov bp,sp<\/strong><\/strong>\nmov ax,[bp+4]<\/strong>;AX=a<\/strong><\/strong>\nadd ax,[bp+6]<\/strong>;AX=a+b<\/strong><\/strong>\nmov [bp+8],ax<\/strong>;c=a+b<\/strong><\/strong>\nmov sp,bp<\/strong><\/strong>\npop bp<\/strong>;\u6062\u590dbp<\/strong><\/strong>\nret<\/strong><\/strong><\/code><\/pre>\n10.12 \u5bc4\u5b58\u5668\u51b2\u7a81\u7684\u95ee\u9898<\/p>\n\u89e3\u51b3\u65b9\u6cd5:\u5728\u5b50\u7a0b\u5e8f\u7684\u5f00\u59cb\u5c06\u5b50\u7a0b\u5e8f\u4e2d\u6240\u6709\u7528\u5230\u7684\u5bc4\u5b58\u5668\u4e2d\u7684\u5185\u5bb9\u90fd\u5165\u6808\u4fdd\u5b58\u8d77\u6765,\u5728\u5b50\u7a0b\u5e8f\u8fd4\u56de\u524d\u6062\u590d\u3002<\/p>\n\u5b50\u7a0b\u5e8f\u7684\u6846\u67b6:<\/strong><\/strong><\/p>\n\u5b50\u7a0b\u5e8f:\u5b50\u7a0b\u5e8f\u4e2d\u4f7f\u7528\u7684\u5bc4\u5b58\u5668\u5165\u6808<\/strong><\/strong><\/p>\n<pre><code>\u5b50\u7a0b\u5e8f\u5185\u5bb9<\/strong><\/strong>\n\u5b50\u7a0b\u5e8f\u4e2d\u4f7f\u7528\u7684\u5bc4\u5b58\u5668\u51fa\u6808<\/strong><\/strong>\n\u8fd4\u56de(ret\\retf)<\/strong><\/strong><\/code><\/pre>\n\u793a\u4f8b:\u5c0f\u5199\u8f6c\u5927\u5199\u7a0b\u5e8f:<\/p>\n<pre><code>capital:push cx\npush si\nchange:mov cl,[si]\nmov ch,0<\/code><\/pre>\njcxz ok<\/p>\n<pre><code>and byte ptr[si],11011111b\ninc si\njmp short change\nok:pop si\npop cx\nret<\/code><\/pre>\n\u5b9e\u9a8c10 \u7f16\u5199\u5b50\u7a0b\u5e8f<\/strong><\/strong><\/p>\n<pre><code><![if !supportLists]>1. <![endif]>\u663e\u793a\u5b57\u7b26\u4e32\n\u5b50\u7a0b\u5e8f\u63cf\u8ff0<\/code><\/pre>\n\u540d\u79f0:show_str<\/p>\n\u529f\u80fd:\u5728\u6307\u5b9a\u7684\u4f4d\u7f6e\u4f7f\u7528\u6307\u5b9a\u7684\u989c\u8272,\u663e\u793a\u4e00\u4e2a\u75280\u7ed3\u675f\u7684\u5b57\u7b26\u4e32<\/p>\n\u53c2\u6570:(dh)=\u884c\u53f7(\u53d6\u503c\u8303\u56f40~24),(dl)=\u5217\u53f7(\u53d6\u503c\u8303\u56f40~79)<\/p>\n(cl)=\u989c\u8272,ds:si\u6307\u5411\u5b57\u7b26\u4e32\u9996\u5730\u5740<\/p>\n\u8fd4\u56de:\u65e0<\/p>\nProgram ex-10-1 \u81ea\u4e3b\u89e3\u6cd5<\/p>\n<pre><code>assume cs:<\/strong>code,ds:<\/strong>data,ss:<\/strong>stack data segment db '<\/strong>welcome to masm!'<\/strong>,0 data ends stack segment db 256 dup(<\/strong>0)<\/strong> <\/strong>stack ends code segment start:<\/strong> <\/strong> mov<\/strong> ax,stack mov<\/strong> ss,ax mov<\/strong> sp,256 ;ss:sp=stack:256<\/i> <\/i> mov<\/strong> dh,8 ;row=8<\/i> <\/i> mov<\/strong> dl,3 ;line=3<\/i> <\/i> mov<\/strong> cl,2 ;color=2<\/i> <\/i> mov<\/strong> ax,data mov<\/strong> ds,ax mov<\/strong> si,0 ;str=data:0<\/i> <\/i> call<\/strong> show_str mov<\/strong> ax,4c00h int<\/strong> 21h show_str:<\/strong> <\/strong>;show_str(byte row=(dh),byte line=(dl),<\/i> <\/i>;byte color=(cl),const char* str =(ds:si));<\/i> <\/i>;\u663e\u5b58\u504f\u79fb\u5730\u5740offset_display=row*160+line*2<\/i> <\/i> push<\/strong> ax push<\/strong> bx push<\/strong> cx push<\/strong> dx push<\/strong> si push<\/strong> di push<\/strong> es mov<\/strong> al,dh mov<\/strong> ah,160 mul<\/strong> ah ;AX=row*160<\/i> <\/i> mov<\/strong> bh,0 mov<\/strong> bl,dl ;BX=(word)line<\/i> <\/i> add<\/strong> ax,bx add<\/strong> ax,bx ;AX=offset_display=row*160+line*2<\/i> <\/i> mov<\/strong> di,ax ;DI=offset_display<\/i> <\/i> mov<\/strong> ax,0b800h mov<\/strong> es,ax ;ES=\u663e\u793a\u7f13\u51b2\u533a<\/i> <\/i> mov<\/strong> dl,cl ;DL=color<\/i> <\/i> ;es:di \u6307\u5411\u663e\u5b58\u663e\u793a\u7f13\u51b2\u533a\u7684\u6307\u9488<\/i> <\/i>display:<\/strong> <\/strong> mov<\/strong> ch,0 mov<\/strong> cl,[si] ;CX=(word)(DS:SI)<\/i> <\/i> jcxz<\/strong> ok ;if((cx)==0) return;<\/i> <\/i> mov<\/strong> es:<\/strong>[di],cl ;(ES:DI)=(DS:SI)<\/i> <\/i> mov<\/strong> es:<\/strong>[di+<\/strong>1],dl;(ES:DI+1)=color<\/i> <\/i> add<\/strong> di,2 add<\/strong> si,1 jmp<\/strong> display ok:<\/strong> pop<\/strong> es pop<\/strong> di pop<\/strong> si pop<\/strong> dx pop<\/strong> cx pop<\/strong> bx pop<\/strong> ax ret<\/strong> <\/strong>code ends end start<\/code><\/pre>\nProgram ex-10-2 \u53c2\u8003\u89e3\u6cd5<\/p>\n<img fetchpriority=\"high\" decoding=\"async\" width=\"330\" height=\"166\" src=\"http:\/\/8.129.82.128\/wp-content\/uploads\/2026\/03\/asm202405\u7248\u63d0\u7eb242603.png\" > <\/p>\n<pre><code>;\u6548\u679c\u56fe<\/code><\/pre>\n;\u5728\u5c4f\u5e55\u76848\u884c3\u4f8b\uff0c\u7528\u7eff\u8272\u663e\u793adata\u6bb5\u4e2d\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<pre><code>assume cs:code,ds:data\ndata segment\ndb 'welcome to masm!',0\ndata ends\ncode segment\nstart:mov dh,8\nmov dl,3\nmov cl,2\nmov ax,data\nmov ds,ax\nmov si,0\ncall show_str<\/code><\/pre>\n <\/p>\n<pre><code>mov ax,4c00h\nint 21h\nshow_str:\npush ax\npush bx\npush es\npush si\nmov ax,0b800h\nmov es,ax\nmov ax,160\nmul dh\nmov bx,ax;bx=160*dh\nmov ax,2\nmul dl;ax=dl*2\nadd bx,ax;mov bx,(160*dh+dl*2)\u8bbe\u7f6ees:bx\u6307\u5411\u663e\u5b58\u9996\u5730\u5740\nmov al,cl;\u628a\u989c\u8272cl\u8d4b\u503cal\nmov cl,0\nshow0:\nmov ch,[si]<\/code><\/pre>\njcxz show1;(ds:si)=0\u65f6\uff0c\u8f6c\u5230show1\u6267\u884c<\/p>\n<pre><code>mov es:[bx],ch\nmov es:[bx].1,al\ninc si;ds:si\u6307\u5411\u4e0b\u4e00\u4e2a\u5b57\u7b26\u5730\u5740\nadd bx,2;es:bx\u6307\u5411\u4e0b\u4e00\u4e2a\u663e\u5b58\u5730\u5740\njmp show0\nshow1:\npop si\npop es\npop bx\npop ax\nret<\/code><\/pre>\n <\/p>\n<pre><code>code ends\nend start\n<![if !supportLists]>2. <![endif]>\u89e3\u51b3\u9664\u6cd5\u6ea2\u51fa\u7684\u95ee\u9898<\/code><\/pre>\n\u5982\u679c\u7ed3\u679c\u7684\u5546\u5927\u4e8eAL\u6216AX\u6240\u80fd\u5b58\u50a8\u7684\u6700\u5927\u503c,\u4fbf\u4f1a\u5f15\u53d1CPU\u7684\u4e00\u4e2a\u5185\u90e8\u9519\u8bef\u51fa\u73b0\u9664\u6cd5\u6ea2\u51fa<\/p>\n<pre><code>\u5b50\u7a0b\u5e8f\u63cf\u8ff0<\/code><\/pre>\n\u540d\u79f0:divdw<\/p>\n\u529f\u80fd:\u8fdb\u884c\u4e0d\u4f1a\u6ea2\u51fa\u7684\u9664\u6cd5\u64cd\u4f5c\uff0c\u88ab\u9664\u6570\u4e3adword\u578b,\u9664\u6570\u4e3aword\u578b,\u7ed3\u679c\u4e3adword\u578b<\/p>\n\u53c2\u6570:(ax)=dword\u578b\u6570\u636e\u7684\u4f4e16\u4f4d\uff0c(dx)=dword\u578b\u6570\u636e\u7684\u9ad816\u4f4d\uff0c(cx)=\u9664\u6570<\/p>\n\u8fd4\u56de:(dx)=\u7ed3\u679c\u7684\u9ad816\u4f4d,(ax)=\u7ed3\u679c\u7684\u4f4e16\u4f4d,(cx)=\u4f59\u6570<\/p>\n<pre><code>\u63d0\u793a\nx\/n=int(h\/n)*65536+[rem(h\/n)*65536+l]\/n<\/code><\/pre>\nx:\u88ab\u9664\u6570\uff0c\u8303\u56f4[0,FFFFFFFF]<\/p>\nn:\u9664\u6570,\u8303\u56f4[0,FFFF]<\/p>\nh:x\u9ad816\u4f4d<\/p>\nl:x\u4f4e16\u4f4d<\/p>\nint()\u53d6\u5546<\/p>\nrem()\u53d6\u4f59<\/p>\n\u516c\u5f0f\u7684\u8bc1\u660e:<\/p>\n\u8bc1\u660e\u6cd51:<\/p>\n\u5c06\u8ba1\u7b97 X \/ n \u5206\u89e3\u4e3a\u8ba1\u7b97\uff1a<\/p>\n<pre><code>( H \/ n ) * 65536 + ( L \/ n ) \uff1b H = int ( x \/ 65536 ) \uff1b L = rem ( x \/ 65536 )\nDIV \u6307\u4ee4\u53ea\u80fd\u5f97\u51fa\u4f59\u6570\u548c\u5546\uff0c\u800c\u6211\u4eec\u53ea\u4fdd\u7559\u5546\u3002\u4f59\u6570\u5fc5\u7136\u5c0f\u4e8e\u9664\u6570\uff0c\u4e00\u6b21\u6b63\u786e\u7684\u9664\u6cd5\u8fd0\u7b97\u53ea\u80fd\u4e22\u6389\u4e00\u4e2a\u4f59\u6570\u3002\u6211\u4eec\u867d\u7136\u5728\u5177\u4f53\u5904\u7406\u65f6\u8fdb\u884c\u4e86\u4e24\u6b21\u9664\u6cd5\u8fd0\u7b97 ( H \/ n ) \u548c ( L \/ n ) \uff1b\u4f46\u8fd9\u5b9e\u8d28\u4e0a\u662f\u4e00\u6b21\u9664\u6cd5\u8fd0\u7b97\uff08X \/ n\uff09\u95ee\u9898\u7684\u5206\u89e3\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e3a\u4fdd\u8bc1\u6700\u7ec8\u7ed3\u679c\u7684\u6b63\u786e\uff0c\u4e24\u6b21\u9664\u6cd5\u8fd0\u7b97\u53ea\u80fd\u4e22\u6389\u4e00\u4e2a\u4f59\u6570\u3002<\/code><\/pre>\n\u5728\u8fd9\u4e2a\u95ee\u9898\u4e2d\uff0cH \/ n \u4ea7\u751f\u7684\u4f59\u6570\u662f\u7edd\u5bf9\u4e0d\u80fd\u4e22\u7684\uff0c\u56e0\u4e3a\u4e22\u6389\u4e86\u5b83\uff08\u8bbe\u4e3a r \uff09\u5c31\u76f8\u5f53\u4e8e\u4e22\u6389\u4e86 r * 65536 \u3002<\/p>\n\u90a3\u4e48\u5982\u4f55\u5904\u7406 \uff08 H \/ n \uff09\u4ea7\u751f\u7684\u4f59\u6570\u5462\uff1f<\/p>\n<pre><code>\u6211\u4eec\u77e5\u9053\uff1aH = int ( H \/ n) * n + rem ( H \/ n )\n\u6240\u4ee5\u6709\uff1a\n( H \/ n ) * 65536 + ( L \/ n )\n= [ int ( H \/ n) * n + rem ( H \/ n ) ] \/ n * 65536 + L \/ n\n= int ( H \/ n) * 65536 + rem ( H \/ n ) * 65536 \/ n + L \/ n\n= int ( H \/ n) * 65536 + [ rem ( H \/ n ) * 65536 + L ] \/ n<\/code><\/pre>\n\u73b0\u5728\u8bb2\u8ba1\u7b97X \/ n \u8f6c\u5316\u4e3a\u8ba1\u7b97\uff1a<\/p>\n<pre><code>int ( H \/ n) * 65536 + [ rem ( H \/ n ) * 65536 + L ] \/ n \uff1b\nH = int ( x \/ 65536 ) \uff1bL = rem ( x \/ 65536 ) \n\u5728\u8fd9\u91cc\u8981\u8fdb\u884c\u4e24\u6b21\u9664\u6cd5\u8fd0\u7b97\uff1a<\/code><\/pre>\n\u7b2c\u4e00\u6b21\uff1a H \/ n<\/p>\n\u7b2c\u4e8c\u6b21\uff1a [ rem ( H \/ n ) * 65536 + L ] \/ n<\/p>\n<pre><code>\u6211\u4eec\u77e5\u9053\u7b2c\u4e00\u6b21\u4e0d\u4f1a\u4ea7\u751f\u9664\u6cd5\u6ea2\u51fa\u3002\n\u73b0\u8bc1\u660e\u7b2c\u4e8c\u6b21\uff1a<\/code><\/pre>\n\u2460L \u2264 65535<\/p>\n\u2461rem ( H \/ n ) \u2264 n \u2013 1<\/p>\n\u7531\u2461\u6709\uff1a<\/p>\n\u2462rem ( H \/ n ) * 65536 \u2264 ( n \u2013 1 ) *65536<\/p>\n\u7531\u2460\uff0c\u2462\u6709\uff1a<\/p>\n④rem ( H \/ n ) * 65536 + L \u2264 ( n \u2013 1 ) *65536 + 65535<\/p>\n\u7531④\u6709\uff1a<\/p>\n⑤[ rem ( H \/ n ) * 65536 + L ] \/ n \u2264 [ ( n \u2013 1 ) *65536 + 65535 ] \/ n<\/p>\n\u7531⑤\u6709\uff1a<\/p>\n⑥[ rem ( H \/ n ) * 65536 + L ] \/ n \u2264 65536 \u2013 ( 1 \/ n )<\/p>\n\u6240\u4ee5 [ rem ( H \/ n ) * 65536 + L ] \/ n \u4e0d\u4f1a\u4ea7\u751f\u9664\u6cd5\u6ea2\u51fa\u3002<\/p>\n<pre><code>\u5219\uff1aX \/ n = int ( H \/ n) * 65536 + [ rem ( H \/ n ) * 65536 + L ] \/ n \uff1b\nH = int ( x \/ 65536 ) \uff1bL = rem ( x \/ 65536 ) <\/code><\/pre>\n\u8bc1\u660e\u6cd52:\u6570\u5b66\u8bc1\u660e<\/strong><\/strong><\/p>\n<img decoding=\"async\" width=\"326\" height=\"491\" src=\"http:\/\/8.129.82.128\/wp-content\/uploads\/2026\/03\/asm202405\u7248\u63d0\u7eb244861.png\" ><\/p>\nProgram ex-10-3 \u81ea\u4e3b\u89e3\u6cd5<\/strong><\/strong><\/p>\n<pre><code>assume cs:<\/strong>code,ds:<\/strong>data,ss:<\/strong>stack data segment db 256 dup(<\/strong>0)<\/strong> <\/strong>data ends stack segment db 256 dup(<\/strong>0)<\/strong> <\/strong>stack ends code segment start:<\/strong> <\/strong> mov<\/strong> ax,stack mov<\/strong> ss,ax ;ss=stack<\/i> <\/i> mov<\/strong> sp,256 mov<\/strong> ax,data mov<\/strong> ds,ax ;ds=data<\/i> <\/i> mov<\/strong> ax,4240h;L(16bit)<\/i> <\/i> mov<\/strong> dx,000fh;H(16bit)<\/i> <\/i> mov<\/strong> cx,0ah ;N(16bit)<\/i> <\/i> ;\u8ba1\u7b971000000\/10(F4240h\/0ah)<\/i> <\/i> call<\/strong> divdw mov<\/strong> ax,4c00h int<\/strong> 21h divdw:<\/strong> <\/strong> push<\/strong> si mov<\/strong> si,0 mov<\/strong> [si],ax ;ds:0=l<\/i> <\/i> mov<\/strong> [si+<\/strong>2],dx ;ds:2=h<\/i> <\/i> mov<\/strong> [si+<\/strong>4],cx ;ds:4=n<\/i> <\/i> ;x\/n=int(h\/n)*65536+[rem(h\/n)*65536+l]\/n<\/i> <\/i> ;\u8ba1\u7b97int(h\/n)<\/i> <\/i> ;\u4e0d\u8981\u4e58\u4ee565536!\u76f4\u63a5\u4f5c\u4e3a\u4e00\u4e2a\u53cc\u5b50\u6570\u636e\u9ad816\u4f4d\u5904\u7406<\/i> <\/i> ;int(h\/n)\u662f\u7ed3\u679c\u5f97\u9ad816\u4f4d<\/i> <\/i> mov<\/strong> ax,[si+<\/strong>2] mov<\/strong> dx,0 div<\/strong> word ptr[si+<\/strong>4] mov<\/strong> [si+<\/strong>6],ax ;int(h\/n) \u5546<\/i> <\/i> mov<\/strong> [si+<\/strong>8],dx ;rem(h\/n) \u4f59\u6570<\/i> <\/i> ;\u8ba1\u7b97[rem(h\/n)*65536+l]\/n<\/i> <\/i> mov<\/strong> ax,[si] ;(dx*0FFFFh+ax)=rem(h\/n)*65536+l<\/i> <\/i> div<\/strong> word ptr[si+<\/strong>4] ;ax=[rem(h\/n)*65536+l]\/n,\u4e3a\u7ed3\u679c\u7684\u4f4e16\u4f4d<\/i> <\/i> ;dx\u4e3a\u4f59\u6570,\u79fb\u5165cx<\/i> <\/i> mov<\/strong> cx,dx mov<\/strong> dx,[si+<\/strong>6] pop<\/strong> si ret<\/strong> <\/strong>code ends end start<\/code><\/pre>\nProgram ex-10-4\u53c2\u8003\u89e3\u6cd5<\/p>\n<img decoding=\"async\" width=\"290\" height=\"147\" src=\"http:\/\/8.129.82.128\/wp-content\/uploads\/2026\/03\/asm202405\u7248\u63d0\u7eb245886.png\" align=\"left\" hspace=\"12\" > <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n <\/p>\n<pre><code>\u6548\u679c\u56fe<\/code><\/pre>\n;\u5e94\u7528\u4e3e\u4f8b\uff1a\u8ba1\u7b971000000\/10(f4240h\/0ah)<\/strong><\/strong><\/p>\n<pre><code>assume cs:code<\/strong><\/strong>\ncode segment<\/strong><\/strong>\nstart:<\/strong>mov ax,4240h<\/strong><\/strong>\nmov dx,000fh<\/strong><\/strong>\nmov cx,0ah<\/strong><\/strong>\ncall divdw<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>mov ax,4c00h<\/strong><\/strong>\nint 21h<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>divdw:<\/strong><\/strong>\npush si<\/strong><\/strong>\npush bx<\/strong><\/strong>\npush ax<\/strong><\/strong>\nmov ax,dx<\/strong><\/strong>\nmov dx,0<\/strong><\/strong>\ndiv cx<\/strong>;\u88ab\u9664\u6570\u7684\u9ad8\u4f4d\/cx,\u9ad8\u4f4d\u5728ax,\u4f59\u6570\u5728dx<\/strong><\/strong>\nmov si,ax<\/strong><\/strong>\npop ax <\/strong><\/strong>\ndiv cx<\/strong>;(\u88ab\u9664\u6570\u9ad8\u4f4d\u7684\u5546+\u4f4e\u4f4d)\/cx,\u9ad8\u4f4d\u5728ax,\u4f59\u6570\u5728dx<\/strong><\/strong>\nmov cx,dx<\/strong>;\u4f59\u6570\u5165cx<\/strong><\/strong>\nmov dx,si<\/strong>;\u9ad8\u4f4d\u7684\u5546\u5165dx<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>pop bx<\/strong><\/strong>\npop si<\/strong><\/strong>\nret<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>code ends<\/strong><\/strong>\nend start<\/strong>\n\u516c\u5f0fx\/n=int(h\/n)*65536+[rem(h\/n)*65536+l]\/n\u89e3\u6790\uff1a <\/code><\/pre>\n\u5982\u679c\u9ad8\u4f4d\u9664\u6cd5\u6709\u5546\uff0c\u90a3\u4e48\u5546\u5c31\u662f\u7ed3\u679c\u7684\u9ad8\u4f4d\u503c\uff0c\u5982\u679c\u4f1a\u6709\u4f59\u6570\uff0c\u90a3\u4e48\u4f59\u6570\u81ea\u7136\u4e0d\u80fd\u4e22\u5f03\uff0c\u4f59\u6570\u5c31\u4f5c\u4e3a\u4f4e\u4f4d\u9664\u6cd5\u7684dx(\u4e5f\u5c31\u662f\u9ad8\u4f4d\u7684\u88ab\u9664\u6570\uff0c\u56e0\u4e3a\u4ed6\u662f\u4ece\u9ad8\u4f4d\u9664\u6cd5\u4e2d\u4f59\u4e0b\u7684\uff09 <\/p>\n\u505a\u4f4e\u4f4d\u9664\u6cd5\u7684\u65f6\u5019\uff0c\u5c31\u62ff\u4f59\u4e0b\u7684dx+\u4f4e\u4f4d\u6570\u7684ax\u9664\u4ee5\u9664\u6570\uff0c\u4f1a\u5f97\u5230 \u4e00\u4e2a\u4f4e\u4f4d\u7684\u5546 \u548c \u4f59\u6570 <\/p>\n\u9ad8\u4f4d\u7684\u5546+\u4f4e\u4f4d\u6570\u7684\u5546+\u4f59\u6570 \u5c31\u662f\u7ed3\u679c<\/p>\n<pre><code><![if !supportLists]>3. <![endif]>\u6570\u503c\u663e\u793a<\/code><\/pre>\n\u7f16\u7a0b,\u5c06data\u6bb5\u4e2d\u7684\u6570\u636e\u4ee5\u5341\u8fdb\u5236\u5f62\u5f0f\u663e\u793a<\/p>\n<pre><code>\u5b50\u7a0b\u5e8f\u63cf\u8ff0<\/code><\/pre>\n\u540d\u79f0: dtoc<\/p>\n\u529f\u80fd:\u5c06word\u578b\u6570\u636e\u8f6c\u53d8\u4e3a\u8868\u793a\u5341\u8fdb\u5236\u5f62\u5f0f\u7684\u5b57\u7b26\u4e32\uff0c\u5b57\u7b26\u4e32\u4ee50\u7ed3\u5c3e<\/p>\n\u53c2\u6570:(ax)=word\u578b\u6570\u636e<\/p>\n<img loading=\"lazy\" decoding=\"async\" width=\"196\" height=\"156\" src=\"http:\/\/8.129.82.128\/wp-content\/uploads\/2026\/03\/asm202405\u7248\u63d0\u7eb246549.png\" align=\"left\" hspace=\"12\" >ds:si\u6307\u5411\u5b57\u7b26\u4e32\u7684\u9996\u5730\u5740<\/p>\n\u8fd4\u56de:\u65e0<\/p>\n<pre><code>\u63d0\u793a\u4e0e\u5206\u6790<\/code><\/pre>\n\u5341\u8fdb\u5236\u6570\u7801\u5b57\u7b26\u5bf9\u5e94\u7684ASCII\u7801=\u5341\u8fdb\u5236\u6570\u7801\u503c+30H<\/p>\n\u6216\u8005\u7528\u6570\u7801\u503c+’0’\u4e5f\u53ef\u4ee5<\/p>\n\u5f97\u51fa10\u8fdb\u5236\u6570\u6bcf\u4f4d\u7684\u503c\u7684\u65b9\u6cd5<\/p>\n\u6ce8:\u8fd9\u4e0e10\u8fdb\u5236\u6570\u8f6c\u6362\u4e3a\u5176\u4ed6\u8fdb\u5236\u7684\u65b9\u6cd5\u7c7b\u4f3c\uff0c\u8be5\u7528\u6cd5\u76f8\u5f53\u4e8e\u752810\u8fdb\u5236\u8f6c\u636210\u8fdb\u5236<\/p>\n<pre><code>\u6ce8\u610f\u51fa\u6765\u7684\u4f59\u6570\u5e94\u8be5\u5012\u8fc7\u6765\u624d\u662f\u539f\u6765\u7684\u6570\u5b57<\/code><\/pre>\n\u4f7f\u7528C++\u6f14\u793a\u539f\u7406:<\/p>\n<pre><code>#include<<\/strong>iostream><\/strong> <\/strong>using<\/strong> namespace<\/strong> std<\/strong>;<\/strong> <\/strong>int<\/strong> main()<\/strong> <\/strong>{<\/strong> <\/strong> int<\/strong> a=<\/strong>12666;<\/strong> <\/strong> while<\/strong>(<\/strong>a!=<\/strong>0)<\/strong> <\/strong> {<\/strong> <\/strong> cout<<(<\/strong>char<\/strong>)(<\/strong>a%<\/strong>10+<\/strong>'0')<<<\/strong>\" \"<\/strong>;<\/strong> <\/strong> a\/=<\/strong>10;<\/strong> <\/strong> }<\/strong> <\/strong> return<\/strong> 0;<\/strong> <\/strong>}<\/strong><\/code><\/pre>\n\u7ed3\u679c:6 6 6 2 1<\/p>\nProgram ex-10-5 \u81ea\u4e3b\u89e3\u6cd5<\/strong><\/strong><\/p>\n<pre><code>assume cs:<\/strong>code,ss:<\/strong>stack,ds:<\/strong>data stack segment db 256 dup(<\/strong>0)<\/strong> <\/strong>stack ends data segment db 256 dup(<\/strong>0)<\/strong> <\/strong>data ends code segment start:<\/strong> <\/strong> mov<\/strong> ax,stack mov<\/strong> ss,ax mov<\/strong> sp,256 mov<\/strong> ax,data mov<\/strong> ds,ax mov<\/strong> si,0 mov<\/strong> ax,12666 call<\/strong> dtoc mov<\/strong> cl,2 mov<\/strong> dh,8 mov<\/strong> dl,3 call<\/strong> show_str mov<\/strong> ax,4c00h int<\/strong> 21h dtoc:<\/strong> <\/strong>;void dtoc(word data=(ax),const char* str=(ds:si));<\/i> <\/i> push<\/strong> dx push<\/strong> cx push<\/strong> bx push<\/strong> ax push<\/strong> si push<\/strong> di mov<\/strong> di,si ;si\u521d\u503c<\/i> <\/i> mov<\/strong> bx,10 mov<\/strong> dx,0 ;\u6ce8\u610f\u76f4\u63a5\u9664\u4f1a\u6ea2\u51fa!<\/i> <\/i>dt_l1:<\/strong> <\/strong> mov<\/strong> dx,0 div<\/strong> bx ;ax=ax\/10,dx=ax%10;<\/i> <\/i> add<\/strong> dl,'<\/strong>0'<\/strong> ;dl+='0';<\/i> <\/i> mov<\/strong> [si],dl ;ds:si=dl<\/i> <\/i> mov<\/strong> cx,ax inc<\/strong> si jcxz<\/strong> exit_dtoc jmp<\/strong> dt_l1 exit_dtoc:<\/strong> <\/strong> ;\u53cd\u8f6c\u5b57\u7b26\u4e32<\/i> <\/i> mov<\/strong> ax,si sub<\/strong> ax,di ;ax=si-di<\/i> <\/i> mov<\/strong> cx,ax ;ax=\u5b57\u7b26\u6570<\/i> <\/i>reverse_str:<\/strong> <\/strong> ;\u7531\u4e8epush\u548cpop\u64cd\u4f5c\u4e3a\u5b57\u64cd\u4f5c<\/i> <\/i> ;\u56e0\u6b64\u8981\u5c06\u6bcf\u4e2a\u5b57\u7b26\u4ece\u5b57\u8282\u8f6c\u4e3a\u5b57<\/i> <\/i> mov<\/strong> bx,[di] mov<\/strong> bh,0 push<\/strong> bx inc<\/strong> di loop<\/strong> reverse_str sub<\/strong> si,ax ;\u5c06si\u6062\u590d\u4e3a\u521d\u59cb\u503c<\/i> <\/i> mov<\/strong> cx,ax copy_str:<\/strong> <\/strong> pop<\/strong> bx mov<\/strong> [si],bl inc<\/strong> si loop<\/strong> copy_str pop<\/strong> di pop<\/strong> si pop<\/strong> ax pop<\/strong> bx pop<\/strong> cx pop<\/strong> dx ret<\/strong> <\/strong> show_str:<\/strong> <\/strong>......<\/strong> <\/strong>code ends end start<\/code><\/pre>\nProgram ex-10-<\/strong>6<\/strong> <\/strong>\u53c2\u8003<\/strong>\u89e3\u6cd5<\/strong><\/strong><\/p>\n<pre><code>assume cs:code,ds:data<\/strong><\/strong>\ndata segment<\/strong><\/strong>\ndb 10 dup (0)<\/strong><\/strong>\ndata ends<\/strong><\/strong>\ncode segment<\/strong><\/strong>\nstart:<\/strong>mov ax,12666<\/strong><\/strong>\nmov bx,data<\/strong><\/strong>\nmov ds,bx<\/strong><\/strong>\nmov si,0<\/strong>;ds:si\u6307\u5411data\u9996\u5730\u5740<\/strong><\/strong>\ncall dtoc1<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>mov dh,8<\/strong><\/strong>\nmov dl,3<\/strong><\/strong>\nmov cl,2<\/strong><\/strong>\ncall show_str<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>mov ax,4c00h<\/strong><\/strong>\nint 21h<\/strong><\/strong>\ndtoc1:<\/strong>push ax<\/strong><\/strong>\npush bx<\/strong><\/strong>\npush cx<\/strong><\/strong>\npush dx<\/strong><\/strong>\npush si<\/strong><\/strong>\npush di<\/strong><\/strong>\nmov di,0<\/strong><\/strong>\nd10:<\/strong>mov dx,0<\/strong>;\u8bbe\u7f6e\u88ab\u9664\u6570\u9ad8\u4f4d\u4e3a0<\/strong><\/strong>\nmov bx,10<\/strong>;\u9664\u6570\u4e3a10<\/strong><\/strong>\ndiv bx<\/strong><\/strong>\nadd dx,30h<\/strong>;ax\/10\u7684\u4f59\u6570+30h\uff0c\u8f6c\u4e3a\u5b57\u7b26<\/strong><\/strong>\npush dx<\/strong>;\u5b57\u7b26\u5165\u6808<\/strong><\/strong>\ninc di<\/strong>;\u8bb0\u5f55\u5b57\u7b26\u4e2a\u6570<\/strong><\/strong>\nmov cx,ax<\/strong><\/strong><\/code><\/pre>\njcxz d11<\/strong>;\u5f53ax\/10\u7684\u5546=0\u65f6\uff0c\u8f6c\u5230d11\u6267\u884c<\/strong><\/strong><\/p>\n<pre><code>jmp d10<\/strong><\/strong>\nd11:<\/strong>mov cx,di<\/strong><\/strong>\nd12:<\/strong>pop dx<\/strong>;\u5b57\u7b26\u51fa\u6808<\/strong><\/strong>\nmov [si],dl<\/strong><\/strong>\ninc si<\/strong>;ds:si\u6307\u5411\u4e0b\u4e00\u5355\u5143<\/strong><\/strong>\nloop d12<\/strong><\/strong>\nmov dl,0<\/strong><\/strong>\nmov [si],dl<\/strong>;\u8bbe\u7f6e\u7ed3\u5c3e\u7b260<\/strong><\/strong>\npop si<\/strong><\/strong>\npop di<\/strong><\/strong>\npop dx<\/strong><\/strong>\npop cx<\/strong><\/strong>\npop bx<\/strong><\/strong>\npop ax<\/strong><\/strong>\nret<\/strong><\/strong>\nshow_str:<\/strong><\/strong>\npush ax<\/strong><\/strong>\npush bx<\/strong><\/strong>\nmov ax,0b800h<\/strong><\/strong>\nmov es,ax<\/strong><\/strong>\nmov ax,160<\/strong><\/strong>\nmul dh<\/strong><\/strong>\nmov bx,ax<\/strong>;bx=160*dh<\/strong><\/strong>\nmov ax,2<\/strong><\/strong>\nmul dl<\/strong>;ax=dl*2<\/strong><\/strong>\nadd bx,ax<\/strong>;mov bx,(160*dh+dl*2)\u8bbe\u7f6ees:bx\u6307\u5411\u663e\u5b58\u9996\u5730\u5740<\/strong><\/strong>\nmov al,cl<\/strong>;\u628a\u989c\u8272cl\u8d4b\u503cal<\/strong><\/strong>\nmov cl,0<\/strong><\/strong>\nshow0:<\/strong><\/strong>\nmov ch,[si]<\/strong><\/strong><\/code><\/pre>\njcxz show1<\/strong>;(ds:si)=0\u65f6\uff0c\u8f6c\u5230show1\u6267\u884c<\/strong><\/strong><\/p>\n<pre><code>mov es:[bx],ch<\/strong><\/strong>\nmov es:[bx].1,al<\/strong><\/strong>\ninc si<\/strong>;ds:si\u6307\u5411\u4e0b\u4e00\u4e2a\u5b57\u7b26\u5730\u5740<\/strong><\/strong>\nadd bx,2<\/strong>;es:bx\u6307\u5411\u4e0b\u4e00\u4e2a\u663e\u5b58\u5730\u5740<\/strong><\/strong>\njmp show0<\/strong><\/strong>\nshow1:<\/strong><\/strong>\npop bx<\/strong><\/strong>\npop ax<\/strong><\/strong>\nret<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>code ends<\/strong><\/strong>\nend start<\/strong><\/strong><\/code><\/pre>\n\u6539\u8fdb\u7a0b\u5e8f:\u5c06dword\u578b\u6570\u636e\u8f6c\u4e3a\u5b57\u7b26<\/p>\n\u540d\u79f0\uff1adtoc2<\/p>\n\u529f\u80fd\uff1a\u5c06dword\u578b\u6570\u636e\u8f6c\u53d8\u4e3a\u8868\u793a\u5341\u8fdb\u5236\u7684\u5b57\u7b26\u4e32\uff0c\u5b57\u7b26\u4e32\u4ee50\u4e3a\u7ed3\u5c3e\u7b26\u3002<\/p>\n\u53c2\u6570\uff1a(ax)=dword\u578b\u6570\u636e\u7684\u4f4e16\u4f4d\uff1b<\/p>\n (dx)=dword\u578b\u6570\u636e\u7684\u9ad816\u4f4d\uff1b<\/p>\n ds:si\u6307\u5411\u5b57\u7b26\u4e32\u9996\u5730\u5740\u3002<\/p>\n<pre><code>\u8fd4\u56de\uff1a\u65e0\u3002<\/code><\/pre>\nProgram ex-10-7 \u81ea\u4e3b\u89e3\u6cd5<\/strong><\/strong><\/p>\n<pre><code>assume cs:<\/strong>code,ss:<\/strong>stack,ds:<\/strong>data stack segment db 256 dup(<\/strong>0)<\/strong> <\/strong>stack ends data segment db 256 dup(<\/strong>0)<\/strong> <\/strong>data ends code segment start:<\/strong> <\/strong> mov<\/strong> ax,stack mov<\/strong> ss,ax mov<\/strong> sp,256 mov<\/strong> ax,data mov<\/strong> ds,ax mov<\/strong> si,0 ;\u6ce8\u610f\u8fd9\u91cc\u4e0d\u8981\u752810\u8fdb\u5236\u5199!<\/i> <\/i> mov<\/strong> ax,0bf52h mov<\/strong> dx,1h call<\/strong> dtoc2 mov<\/strong> cl,2 mov<\/strong> dh,8 mov<\/strong> dl,3 call<\/strong> show_str mov<\/strong> ax,4c00h int<\/strong> 21h dtoc2:<\/strong> <\/strong>;void dtoc2(dword data=(bx)*65536+(ax),const char* str=(ds:si));<\/i> <\/i> push<\/strong> dx push<\/strong> cx push<\/strong> bx push<\/strong> ax push<\/strong> si push<\/strong> di mov<\/strong> di,si ;si\u521d\u503c<\/i> <\/i> dt_l1:<\/strong> <\/strong> mov<\/strong> cx,10 call<\/strong> divdw ;dx*65536+ax=\u5546,cx=\u4f59\u6570<\/i> <\/i> add<\/strong> cl,'<\/strong>0'<\/strong> ;cl+='0';<\/i> <\/i> mov<\/strong> [si],cl ;ds:si=cl<\/i> <\/i> mov<\/strong> cx,dx jcxz<\/strong> dx_is_0 ;dx==0\u65f6\u7ee7\u7eed\u5224\u65adax\u662f\u5426\u4e3a0<\/i> <\/i> jmp<\/strong> dx_is_not_0 ;dx!=0\u65f6<\/i> <\/i> dx_is_0:<\/strong> <\/strong> mov<\/strong> cx,ax dx_is_not_0:<\/strong> inc<\/strong> si jcxz<\/strong> exit_dtoc ;ax==0\u65f6\u5411\u5916\u8df3\u8f6c,\u5426\u5219\u5411\u4e0b <\/i> <\/i> jmp<\/strong> dt_l1 exit_dtoc:<\/strong> <\/strong> ;\u53cd\u8f6c\u5b57\u7b26\u4e32<\/i> <\/i> mov<\/strong> ax,si sub<\/strong> ax,di ;ax=si-di<\/i> <\/i> mov<\/strong> cx,ax ;ax=\u5b57\u7b26\u6570<\/i> <\/i> reverse_str:<\/strong> <\/strong> ;\u7531\u4e8epush\u548cpop\u64cd\u4f5c\u4e3a\u5b57\u64cd\u4f5c<\/i> <\/i> ;\u56e0\u6b64\u8981\u5c06\u6bcf\u4e2a\u5b57\u7b26\u4ece\u5b57\u8282\u8f6c\u4e3a\u5b57<\/i> <\/i> mov<\/strong> bx,[di] mov<\/strong> bh,0 push<\/strong> bx inc<\/strong> di loop<\/strong> reverse_str sub<\/strong> si,ax ;\u5c06si\u6062\u590d\u4e3a\u521d\u59cb\u503c<\/i> <\/i> mov<\/strong> cx,ax copy_str:<\/strong> <\/strong> pop<\/strong> bx mov<\/strong> [si],bl inc<\/strong> si loop<\/strong> copy_str pop<\/strong> di pop<\/strong> si pop<\/strong> ax pop<\/strong> bx pop<\/strong> cx pop<\/strong> dx ret<\/strong> <\/strong> show_str:<\/strong> <\/strong>......<\/strong> divdw:<\/strong> <\/strong> push<\/strong> si mov<\/strong> si,0 ;\u4e3a\u4e86\u9632\u6b62\u5f71\u54cd\u5230\u5176\u4ed6\u7a0b\u5e8f\u7684\u5185\u5b58,\u5c06\u4f7f\u7528\u7684\u5355\u5143\u5907\u4efd<\/i> <\/i> ;\u89e3\u51b3\u5185\u5b58\u51b2\u7a81\u7684\u65b9\u6cd5:<\/i> <\/i> push<\/strong> [si] push<\/strong> [si+<\/strong>2] push<\/strong> [si+<\/strong>4] push<\/strong> [si+<\/strong>6] push<\/strong> [si+<\/strong>8] mov<\/strong> [si],ax ;ds:0=l<\/i> <\/i> mov<\/strong> [si+<\/strong>2],dx ;ds:2=h<\/i> <\/i> mov<\/strong> [si+<\/strong>4],cx ;ds:4=n<\/i> <\/i> ;x\/n=int(h\/n)*65536+[rem(h\/n)*65536+l]\/n<\/i> <\/i> ;\u8ba1\u7b97int(h\/n)<\/i> <\/i> ;\u4e0d\u8981\u4e58\u4ee565536!\u76f4\u63a5\u4f5c\u4e3a\u4e00\u4e2a\u53cc\u5b50\u6570\u636e\u9ad816\u4f4d\u5904\u7406<\/i> <\/i> ;int(h\/n)\u662f\u7ed3\u679c\u5f97\u9ad816\u4f4d<\/i> <\/i> mov<\/strong> ax,[si+<\/strong>2] mov<\/strong> dx,0 div<\/strong> word ptr[si+<\/strong>4] mov<\/strong> [si+<\/strong>6],ax ;int(h\/n) \u5546<\/i> <\/i> mov<\/strong> [si+<\/strong>8],dx ;rem(h\/n) \u4f59\u6570<\/i> <\/i> ;\u8ba1\u7b97[rem(h\/n)*65536+l]\/n<\/i> <\/i> mov<\/strong> ax,[si] ;(dx*0FFFFh+ax)=rem(h\/n)*65536+l<\/i> <\/i> div<\/strong> word ptr[si+<\/strong>4] ;ax=[rem(h\/n)*65536+l]\/n,\u4e3a\u7ed3\u679c\u7684\u4f4e16\u4f4d<\/i> <\/i> ;dx\u4e3a\u4f59\u6570,\u79fb\u5165cx<\/i> <\/i> mov<\/strong> cx,dx mov<\/strong> dx,[si+<\/strong>6] pop<\/strong> [si+<\/strong>8] pop<\/strong> [si+<\/strong>6] pop<\/strong> [si+<\/strong>4] pop<\/strong> [si+<\/strong>2] pop<\/strong> [si] pop<\/strong> si ret<\/strong> <\/strong>code ends end start<\/code><\/pre>\nProgram ex-10-8 \u53c2\u8003\u89e3\u6cd5<\/strong><\/strong><\/p>\n;\u5e94\u7528\u4e3e\u4f8b\uff1a\u5c06\u6570\u636e2494967295\u4ee5\u5341\u8fdb\u5236\u7684\u5f62\u5f0f\u5728\u5c4f\u5e55\u76848\u884c3\u5217\uff0c\u7528\u7eff\u8272\u663e\u793a\u51fa\u6765\u3002<\/strong><\/strong><\/p>\n<pre><code>assume cs:code,ds:data<\/strong><\/strong>\ndata segment<\/strong><\/strong>\ndb 10 dup (0)<\/strong><\/strong>\ndata ends<\/strong><\/strong>\ncode segment<\/strong><\/strong>\nstart:<\/strong>mov ax,0ffffh<\/strong><\/strong>\nmov dx,0ffffh<\/strong><\/strong>\nmov bx,data<\/strong><\/strong>\nmov ds,bx<\/strong><\/strong>\nmov si,0<\/strong>;ds:si\u6307\u5411\u5b57\u7b26\u4e32\u9996\u5730\u5740<\/strong><\/strong>\ncall dtoc2<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>mov dh,8<\/strong><\/strong>\nmov dl,3<\/strong><\/strong>\nmov cl,2<\/strong><\/strong>\ncall show_str<\/strong><\/strong><\/code><\/pre>\n <\/strong><\/p>\n<pre><code>mov ax,4c00h<\/strong><\/strong>\nint 21h<\/strong><\/strong>\ndtoc2:<\/strong><\/strong>\npush ax<\/strong><\/strong>\npush bx<\/strong><\/strong>\npush cx<\/strong><\/strong>\npush dx<\/strong><\/strong>\npush si<\/strong><\/strong>\npush di<\/strong><\/strong>\nmov di,0<\/strong><\/strong>\nd20:<\/strong>mov cx,10<\/strong>;\u9664\u6570\u4e3a10<\/strong><\/strong>\ncall divdw<\/strong><\/strong>\nadd cx,30h<\/strong>;\u4f59\u6570+30h\uff0c\u8f6c\u4e3a\u5b57\u7b26<\/strong><\/strong>\npush cx<\/strong>;\u5b57\u7b26\u5165\u6808<\/strong><\/strong>\ninc di<\/strong>;\u8bb0\u5f55\u5b57\u7b26\u4e2a\u6570<\/strong><\/strong>\nmov cx,ax <\/strong><\/strong><\/code><\/pre>\njcxz d21<\/strong>;\u4f4e\u4f4d\u5546=0\u65f6\uff0c\u8f6c\u5230d21\u68c0\u6d4b\u9ad8\u4f4d\u5546<\/strong><\/strong><\/p>\n<pre><code>jmp d20<\/strong><\/strong>\nd21:<\/strong>mov cx,dx<\/strong><\/strong><\/code><\/pre>\njcxz d22<\/strong>;\u9ad8\u4f4e\u4f4d\u5546\u5168=0\u65f6\uff0c\u8f6c\u5230d22\u6267\u884c<\/strong><\/strong><\/p>\n<pre><code>jmp d20<\/strong><\/strong>\nd22:<\/strong>mov cx,di<\/strong><\/strong>\nd23:<\/strong>pop ax<\/strong>;\u5b57\u7b26\u51fa\u6808<\/strong><\/strong>\nmov [si],al<\/strong><\/strong>\ninc si<\/strong>;ds:si\u6307\u5411\u4e0b\u4e00\u5355\u5143<\/strong><\/strong>\nloop d23<\/strong><\/strong>\nmov al,0<\/strong><\/strong>\nmov [si],al<\/strong>;\u8bbe\u7f6e\u7ed3\u5c3e\u7b260<\/strong><\/strong>\npop di<\/strong><\/strong>\npop si<\/strong><\/strong>\npop dx<\/strong><\/strong>\npop cx<\/strong><\/strong>\npop bx<\/strong><\/strong>\npop ax<\/strong><\/strong>\nret<\/strong><\/strong>\nshow_str:<\/strong><\/strong>\npush ax<\/strong><\/strong>\npush bx<\/strong><\/strong>\nmov ax,0b800h<\/strong><\/strong>\nmov es,ax<\/strong><\/strong>\nmov ax,160<\/strong><\/strong>\nmul dh<\/strong><\/strong>\nmov bx,ax<\/strong>;bx=160*dh<\/strong><\/strong>\nmov ax,2<\/strong><\/strong>\nmul dl<\/strong>;ax=dl*2<\/strong><\/strong>\nadd bx,ax<\/strong>;mov bx,(160*dh+dl*2)\u8bbe\u7f6ees:bx\u6307\u5411\u663e\u5b58\u9996\u5730\u5740<\/strong><\/strong>\nmov al,cl<\/strong>;\u628a\u989c\u8272cl\u8d4b\u503cal<\/strong><\/strong>\nmov cl,0<\/strong><\/strong>\nshow0:<\/strong><\/strong>\nmov ch,[si]<\/strong><\/strong><\/code><\/pre>\njcxz show1<\/strong>;(ds:si)=0\u65f6\uff0c\u8f6c\u5230show1\u6267\u884c<\/strong><\/strong><\/p>\n<pre><code>mov es:[bx],ch<\/strong><\/strong>\nmov es:[bx].1,al<\/strong><\/strong>\ninc si<\/strong>;ds:si\u6307\u5411\u4e0b\u4e00\u4e2a\u5b57\u7b26\u5730\u5740<\/strong><\/strong>\nadd bx,2<\/strong>;es:bx\u6307\u5411\u4e0b\u4e00\u4e2a\u663e\u5b58\u5730\u5740<\/strong><\/strong>\njmp show0<\/strong><\/strong>\nshow1:<\/strong><\/strong>\npop bx<\/strong><\/strong>\npop ax<\/strong><\/strong>\nret<\/strong><\/strong>\ndivdw:<\/strong><\/strong>\npush si<\/strong><\/strong>\npush bx<\/strong><\/strong>\npush ax<\/strong><\/strong>\nmov ax,dx<\/strong><\/strong>\nmov dx,0<\/strong><\/strong>\ndiv cx<\/strong>;\u88ab\u9664\u6570\u7684\u9ad8\u4f4d\/cx<\/strong><\/strong>\nmov si,ax<\/strong><\/strong>\npop ax <\/strong><\/strong>\ndiv cx<\/strong>;(\u88ab\u9664\u6570\u9ad8\u4f4d\u7684\u5546+\u4f4e\u4f4d)\/cx<\/strong><\/strong>\nmov cx,dx<\/strong>;\u4f59\u6570\u5165cx<\/strong><\/strong>\nmov dx,si<\/strong>;\u9ad8\u4f4d\u7684\u5546\u5165dx<\/strong><\/strong>\npop bx<\/strong><\/strong>\npop si<\/strong><\/strong>\nret<\/strong><\/strong>\ncode ends<\/strong><\/strong>\nend start<\/strong><\/strong><\/code><\/pre>\n\u8bfe\u7a0b\u8bbe\u8ba1<\/strong>1<\/strong><\/strong><\/p>\n\u5c06\u5b9e\u9a8c7\u4e2d\u7684Power idea\u516c\u53f8\u7684\u6570\u636e\u6309\u7167\u56fe\u6240\u793a\u7684\u683c\u5f0f\u5728\u5c4f\u5e55\u4e0a\u663e\u793a\u73b0\u6765\u3002<\/p>\n<img loading=\"lazy\" decoding=\"async\" width=\"417\" height=\"212\" src=\"http:\/\/8.129.82.128\/wp-content\/uploads\/2026\/03\/asm202405\u7248\u63d0\u7eb252948.png\" > <\/p>\n<pre><code>\u6548\u679c\u56fe<\/code><\/pre>\nProgram lesson-design-1-1 \u81ea\u5df1\u7684\u89e3\u6cd5<\/strong><\/strong><\/p>\n<pre><code>assume cs:<\/strong>code,ds:<\/strong>data,ss:<\/strong>stack,es:<\/strong>table_ data segment db '<\/strong>1975'<\/strong>,'<\/strong>1976'<\/strong>,'<\/strong>1977'<\/strong>,'<\/strong>1978'<\/strong>,'<\/strong>1979'<\/strong>,'<\/strong>1980'<\/strong>,'<\/strong>1981'<\/strong>,'<\/strong>1982'<\/strong>,'<\/strong>1983'<\/strong> <\/strong> db '<\/strong>1984'<\/strong>,'<\/strong>1985'<\/strong>,'<\/strong>1986'<\/strong>,'<\/strong>1987'<\/strong>,'<\/strong>1988'<\/strong>,'<\/strong>1989'<\/strong>,'<\/strong>1990'<\/strong>,'<\/strong>1991'<\/strong>,'<\/strong>1992'<\/strong> <\/strong> db '<\/strong>1993'<\/strong>,'<\/strong>1994'<\/strong>,'<\/strong>1995'<\/strong> <\/strong> ;\u4ee5\u4e0a\u4e3a21\u5e74\u768421\u4e2a\u5b57\u7b26\u4e32(+84byte)<\/i> <\/i> dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514 dd 345980,590827,803530,1183000,1843000,2759000,3753000,4649000,5937000 ;\u4ee5\u4e0a\u4e3a21\u5e74\u7684\u603b\u6536\u5165\u6570\u636e(+168byte)<\/i> <\/i> dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226 dw 11452,14430,15257,17800 ;\u4ee5\u4e0a\u4e3a21\u5e74\u6bcf\u5e74\u7684\u96c7\u5458\u4eba\u6570<\/i> <\/i>data ends temp segment db 512 dup(<\/strong>0)<\/strong> <\/strong>temp ends stack segment db 256 dup(<\/strong>0)<\/strong> <\/strong>stack ends table_ segment db 21 dup (<\/strong>'<\/strong>year'<\/strong>,0,'<\/strong>summ ne ?? '<\/strong>)<\/strong> <\/strong>table_ ends code segment start:<\/strong> <\/strong> mov<\/strong> ax,data mov<\/strong> ds,ax ;ds=data<\/i> <\/i> mov<\/strong> ax,table_ mov<\/strong> es,ax ;es=table_<\/i> <\/i> mov<\/strong> ax,stack mov<\/strong> ss,ax ;ss=stack<\/i> <\/i> mov<\/strong> sp,256 mov<\/strong> bx,0 mov<\/strong> cx,21 mov<\/strong> di,0 ;\u5199\u5165\u5e74\u4efd<\/i> <\/i> l1:<\/strong> <\/strong> mov<\/strong> ax,[di] mov<\/strong> es:<\/strong>[bx+<\/strong>0],ax mov<\/strong> ax,[di+<\/strong>2] mov<\/strong> es:<\/strong>[bx+<\/strong>2],ax add<\/strong> di,4 ;\u6362\u4e0b\u4e00\u884c<\/i> <\/i> add<\/strong> bx,16 loop<\/strong> l1 ;\u5199\u5165\u6536\u5165<\/i> <\/i> mov<\/strong> bx,0 mov<\/strong> cx,21 l2:<\/strong> <\/strong> mov<\/strong> ax,[di] mov<\/strong> es:<\/strong>[bx+<\/strong>5],ax mov<\/strong> ax,[di+<\/strong>2] mov<\/strong> es:<\/strong>[bx+<\/strong>7],ax add<\/strong> di,4 add<\/strong> bx,16 loop<\/strong> l2 ;\u5199\u5165\u96c7\u5458\u6570<\/i> <\/i> mov<\/strong> bx,0 mov<\/strong> cx,21 l3:<\/strong> <\/strong> mov<\/strong> ax,[di] mov<\/strong> es:<\/strong>[bx+<\/strong>0ah],ax add<\/strong> di,2 add<\/strong> bx,16 loop<\/strong> l3 ;\u8ba1\u7b97\u4eba\u5747\u6536\u5165<\/i> <\/i> mov<\/strong> bx,0 mov<\/strong> cx,21 mov<\/strong> di,84 mov<\/strong> si,0 ;\u7528\u4e8e\u5b9a\u4f4d\u88ab\u9664\u6570<\/i> <\/i> l4:<\/strong> <\/strong> mov<\/strong> dx,[di+<\/strong>2] mov<\/strong> ax,[di] div<\/strong> word ptr[168+<\/strong>si] mov<\/strong> es:<\/strong>[bx+<\/strong>0dh],ax add<\/strong> si,2 add<\/strong> di,4 add<\/strong> bx,16 loop<\/strong> l4 ;\u663e\u793atable<\/i> <\/i> mov<\/strong> ax,table_ mov<\/strong> ds,ax ;ds=table_<\/i> <\/i> mov<\/strong> si,0 ;\u8868\u683c\u6bcf\u4e00\u884c\u7684\u5730\u5740<\/i> <\/i> mov<\/strong> cx,21 mov<\/strong> dh,2 ;\u884c\u53f7<\/i> <\/i>s1:<\/strong> mov<\/strong> dl,20 ;\u6bcf\u6b21\u90fd\u8981\u8fd8\u539f\u5217\u53f7<\/i> <\/i> push<\/strong> cx ;\u663e\u793a\u5e74\u4efd<\/i> <\/i> mov<\/strong> cl,2 call<\/strong> show_str ;str=ds:si<\/i> <\/i> pop<\/strong> cx add<\/strong> si,10h ;\u8868\u683c\u4e0b\u4e00\u884c<\/i> <\/i> inc<\/strong> dh ;\u4e0b\u4e00\u884c<\/i> <\/i> loop<\/strong> s1 mov<\/strong> ax,temp mov<\/strong> ds,ax ;ds=temp<\/i> <\/i> mov<\/strong> si,0 ;ds:si\u5b58\u653e\u5b57\u7b26<\/i> <\/i> mov<\/strong> di,0 ;es:di\u53d6\u6570\u636e<\/i> <\/i> mov<\/strong> cx,21 mov<\/strong> si,0 s2:<\/strong> ;\u5c06\u6536\u5165\u8f6c\u4e3a\u5b57\u7b26<\/i> <\/i> mov<\/strong> ax,es:<\/strong>[di+<\/strong>5] mov<\/strong> dx,es:<\/strong>[di+<\/strong>7] call<\/strong> dtoc2 ;\u5b57\u7b26\u4f4d\u4e8eds:0<\/i> <\/i> ;\u5c06\u96c7\u5458\u6570\u8f6c\u4e3a\u5b57\u7b26<\/i> <\/i> add<\/strong> si,10 mov<\/strong> ax,es:<\/strong>[di+<\/strong>0ah] mov<\/strong> dx,0 call<\/strong> dtoc2 ;\u5b57\u7b26\u4f4d\u4e8eds:10<\/i> <\/i> ;\u5c06\u4eba\u5747\u6536\u5165\u8f6c\u4e3a\u5b57\u7b26<\/i> <\/i> add<\/strong> si,6 mov<\/strong> ax,es:<\/strong>[di+<\/strong>0dh] mov<\/strong> dx,0 call<\/strong> dtoc2 add<\/strong> si,6 add<\/strong> di,16 loop<\/strong> s2 mov<\/strong> dh,2 ;\u884c\u53f7<\/i> <\/i> mov<\/strong> dl,28 ;\u5217\u53f7<\/i> <\/i> mov<\/strong> cx,21 mov<\/strong> si,0 s3:<\/strong> ;\u6253\u5370\u5b57\u7b26<\/i> <\/i> mov<\/strong> dl,28 push<\/strong> cx mov<\/strong> cl,2 call<\/strong> show_str pop<\/strong> cx add<\/strong> si,10 add<\/strong> dl,10 push<\/strong> cx mov<\/strong> cl,2 call<\/strong> show_str pop<\/strong> cx add<\/strong> si,6 add<\/strong> dl,6 push<\/strong> cx mov<\/strong> cl,2 call<\/strong> show_str pop<\/strong> cx add<\/strong> si,6 add<\/strong> dl,6 inc<\/strong> dh loop<\/strong> s3 mov<\/strong> ax,4c00h int<\/strong> 21h dtoc2:<\/strong> <\/strong>;void dtoc2(dword data=(dx)*65536+(ax),const char* str=(ds:si));<\/i> <\/i> push<\/strong> dx push<\/strong> cx push<\/strong> bx push<\/strong> ax push<\/strong> si push<\/strong> di mov<\/strong> di,si ;si\u521d\u503c<\/i> <\/i> dt_l1:<\/strong> <\/strong> mov<\/strong> cx,10 call<\/strong> divdw ;dx*65536+ax=\u5546,cx=\u4f59\u6570<\/i> <\/i> add<\/strong> cl,'<\/strong>0'<\/strong> ;cl+='0';<\/i> <\/i> mov<\/strong> [si],cl ;ds:si=cl<\/i> <\/i> mov<\/strong> cx,dx jcxz<\/strong> dx_is_0 ;dx==0\u65f6\u7ee7\u7eed\u5224\u65adax\u662f\u5426\u4e3a0<\/i> <\/i> jmp<\/strong> dx_is_not_0 ;dx!=0\u65f6<\/i> <\/i> dx_is_0:<\/strong> <\/strong> mov<\/strong> cx,ax dx_is_not_0:<\/strong> inc<\/strong> si jcxz<\/strong> exit_dtoc ;ax==0\u65f6\u5411\u5916\u8df3\u8f6c,\u5426\u5219\u5411\u4e0b <\/i> <\/i> jmp<\/strong> dt_l1 exit_dtoc:<\/strong> <\/strong> ;\u53cd\u8f6c\u5b57\u7b26\u4e32<\/i> <\/i> mov<\/strong> ax,si sub<\/strong> ax,di ;ax=si-di<\/i> <\/i> mov<\/strong> cx,ax ;ax=\u5b57\u7b26\u6570<\/i> <\/i> reverse_str:<\/strong> <\/strong> ;\u7531\u4e8epush\u548cpop\u64cd\u4f5c\u4e3a\u5b57\u64cd\u4f5c<\/i> <\/i> ;\u56e0\u6b64\u8981\u5c06\u6bcf\u4e2a\u5b57\u7b26\u4ece\u5b57\u8282\u8f6c\u4e3a\u5b57<\/i> <\/i> mov<\/strong> bx,[di] mov<\/strong> bh,0 push<\/strong> bx inc<\/strong> di loop<\/strong> reverse_str sub<\/strong> si,ax ;\u5c06si\u6062\u590d\u4e3a\u521d\u59cb\u503c<\/i> <\/i> mov<\/strong> cx,ax copy_str:<\/strong> <\/strong> pop<\/strong> bx mov<\/strong> [si],bl inc<\/strong> si loop<\/strong> copy_str pop<\/strong> di pop<\/strong> si pop<\/strong> ax pop<\/strong> bx pop<\/strong> cx pop<\/strong> dx ret<\/strong> <\/strong> show_str:<\/strong> <\/strong>;void show_str(byte row=(dh),byte line=(dl),<\/i> <\/i>;byte color=(cl),const char* str =(ds:si));<\/i> <\/i>;\u663e\u5b58\u504f\u79fb\u5730\u5740offset_display=row*160+line*2<\/i> <\/i> push<\/strong> ax push<\/strong> bx push<\/strong> cx push<\/strong> dx push<\/strong> si push<\/strong> di push<\/strong> es mov<\/strong> al,dh mov<\/strong> ah,160 mul<\/strong> ah ;AX=row*160<\/i> <\/i> mov<\/strong> bh,0 mov<\/strong> bl,dl ;BX=(word)line<\/i> <\/i> add<\/strong> ax,bx add<\/strong> ax,bx ;AX=offset_display=row*160+line*2<\/i> <\/i> mov<\/strong> di,ax ;DI=offset_display<\/i> <\/i> mov<\/strong> ax,0b800h mov<\/strong> es,ax ;ES=\u663e\u793a\u7f13\u51b2\u533a<\/i> <\/i> mov<\/strong> dl,cl ;DL=color<\/i> <\/i> ;es:di \u6307\u5411\u663e\u5b58\u663e\u793a\u7f13\u51b2\u533a\u7684\u6307\u9488<\/i> <\/i> display:<\/strong> <\/strong> mov<\/strong> ch,0 mov<\/strong> cl,[si] ;CX=(word)(DS:SI)<\/i> <\/i> jcxz<\/strong> ok ;if((cx)==0) return;<\/i> <\/i> mov<\/strong> es:<\/strong>[di],cl ;(ES:DI)=(DS:SI)<\/i> <\/i> mov<\/strong> es:<\/strong>[di+<\/strong>1],dl;(ES:DI+1)=color<\/i> <\/i> add<\/strong> di,2 add<\/strong> si,1 jmp<\/strong> display ok:<\/strong> pop<\/strong> es pop<\/strong> di pop<\/strong> si pop<\/strong> dx pop<\/strong> cx pop<\/strong> bx pop<\/strong> ax ret<\/strong> <\/strong> divdw:<\/strong> <\/strong> push<\/strong> si mov<\/strong> si,0 ;\u4e3a\u4e86\u9632\u6b62\u5f71\u54cd\u5230\u5176\u4ed6\u7a0b\u5e8f\u7684\u5185\u5b58,\u5c06\u4f7f\u7528\u7684\u5355\u5143\u5907\u4efd<\/i> <\/i> ;\u89e3\u51b3\u5185\u5b58\u51b2\u7a81\u7684\u65b9\u6cd5:<\/i> <\/i> push<\/strong> [si] push<\/strong> [si+<\/strong>2] push<\/strong> [si+<\/strong>4] push<\/strong> [si+<\/strong>6] push<\/strong> [si+<\/strong>8] mov<\/strong> [si],ax ;ds:0=l<\/i> <\/i> mov<\/strong> [si+<\/strong>2],dx ;ds:2=h<\/i> <\/i> mov<\/strong> [si+<\/strong>4],cx ;ds:4=n<\/i> <\/i> ;x\/n=int(h\/n)*65536+[rem(h\/n)*65536+l]\/n<\/i> <\/i> ;\u8ba1\u7b97int(h\/n)<\/i> <\/i> ;\u4e0d\u8981\u4e58\u4ee565536!\u76f4\u63a5\u4f5c\u4e3a\u4e00\u4e2a\u53cc\u5b50\u6570\u636e\u9ad816\u4f4d\u5904\u7406<\/i> <\/i> ;int(h\/n)\u662f\u7ed3\u679c\u5f97\u9ad816\u4f4d<\/i> <\/i> mov<\/strong> ax,[si+<\/strong>2] mov<\/strong> dx,0 div<\/strong> word ptr[si+<\/strong>4] mov<\/strong> [si+<\/strong>6],ax ;int(h\/n) \u5546<\/i> <\/i> mov<\/strong> [si+<\/strong>8],dx ;rem(h\/n) \u4f59\u6570<\/i> <\/i> ;\u8ba1\u7b97[rem(h\/n)*65536+l]\/n<\/i> <\/i> mov<\/strong> ax,[si] ;(dx*0FFFFh+ax)=rem(h\/n)*65536+l<\/i> <\/i> div<\/strong> word ptr[si+<\/strong>4] ;ax=[rem(h\/n)*65536+l]\/n,\u4e3a\u7ed3\u679c\u7684\u4f4e16\u4f4d<\/i> <\/i> ;dx\u4e3a\u4f59\u6570,\u79fb\u5165cx<\/i> <\/i> mov<\/strong> cx,dx mov<\/strong> dx,[si+<\/strong>6] pop<\/strong> [si+<\/strong>8] pop<\/strong> [si+<\/strong>6] pop<\/strong> [si+<\/strong>4] pop<\/strong> [si+<\/strong>2] pop<\/strong> [si] pop<\/strong> si ret<\/strong> <\/strong>code ends end start<\/code><\/pre>\nProgram lesson-design-1-2 \u53c2\u8003\u89e3\u6cd5<\/strong><\/strong><\/p>\n<pre><code>assume cs:code,ds:data,es:table\ntable segment\n db '1975','1976','1977','1978','1979','1980','1981','1982','1983'\n db '1984','1985','1986','1987','1988','1989','1990','1991','1992'\n db '1993','1994','1995'\n dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514\n dd 345980,590827,803530,1183000,1843000,2795000,3753000,4649000,5937000\n dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226\n dw 11542,14430,15257,17800\n dw 5,3,42,104,85,210,123,111,105,125,140,136,153,211,199,209,224,239\n dw 260,304,333\ntable ends\ndata segment\n db 32 dup (0)\ndata ends\ncode segment\nstart:mov ax,data\nmov ds,ax\nmov ax,table\nmov es,ax\nmov bx,0\nmov si,0\nmov di,0\nmov cx,21\nmov dh,2\nmov dl,30\ng:push cx\npush dx\nmov ax,es:[bx]\nmov [si],ax\nmov ax,es:[bx].2\nmov [si].2,ax;\u5e74\u4efd\u5165ds:si\nadd si,6\nmov ax,es:[bx].84\nmov dx,es:[bx].86\ncall dtoc2;\u6536\u5165\u8f6c\u6210\u5341\u8fdb\u5236\u5b57\u7b26\u5165ds:si\nadd si,10\nmov ax,es:[di].168\nmov dx,0\ncall dtoc2;\u4eba\u5458\u6570\u8f6c\u6210\u5341\u8fdb\u5236\u5b57\u7b26\u5165ds:si\nadd si,6\nmov ax,es:[di].210\nmov dx,0\ncall dtoc2;\u4eba\u5747\u6536\u5165\u8f6c\u6210\u5341\u8fdb\u5236\u5b57\u7b26\u5165ds:si\nmov si,0;\u8bbe\u7f6eds:si\u6307\u5411\u9700\u663e\u793a\u5b57\u7b26\u9996\u5730\u5740\nb:mov cx,29\nc:push cx\nmov cl,[si]<\/code><\/pre>\njcxz f;(ds:si)=0\u8f6c\u5230f\u6267\u884c<\/p>\n<pre><code>d:inc si\npop cx\nloop c\ninc si\nmov al,0\nmov [si],al;\u8bbe\u7f6e\u7ed3\u5c3e\u7b260\nmov si,0;\u8bbe\u7f6eds:si\u6307\u5411\u9700\u663e\u793a\u5b57\u7b26\u9996\u5730\u5740\npop dx\nmov cl,2\ncall show_str\nadd bx,4;dword\u6570\u636e\u6307\u5411\u4e0b\u4e00\u6570\u636e\u5355\u5143\nadd di,2;word\u6570\u636e\u6307\u5411\u4e0b\u4e00\u6570\u636e\u5355\u5143\nadd dh,1;\u6307\u5411\u663e\u5b58\u4e0b\u4e00\u884c\npop cx\nloop g\nmov ax,4c00h\nint 21h\nf:mov al,20h\nmov [si],al;(ds:si)=0\u7684\u6570\u636e\u6539\u6210\u7a7a\u683c\njmp d\ndtoc2:\npush ax\npush bx\npush cx\npush dx\npush si\npush di\nmov di,0\nd20:mov cx,10;\u9664\u6570\u4e3a10\ncall divdw\nadd cx,30h;\u4f59\u6570+30h\uff0c\u8f6c\u4e3a\u5b57\u7b26\npush cx;\u5b57\u7b26\u5165\u6808\ninc di;\u8bb0\u5f55\u5b57\u7b26\u4e2a\u6570\nmov cx,ax <\/code><\/pre>\njcxz d21;\u4f4e\u4f4d\u5546=0\u65f6\uff0c\u8f6c\u5230d21\u68c0\u6d4b\u9ad8\u4f4d\u5546<\/p>\n<pre><code>jmp d20\nd21:mov cx,dx<\/code><\/pre>\njcxz d22;\u9ad8\u4f4e\u4f4d\u5546\u5168=0\u65f6\uff0c\u8f6c\u5230d22\u6267\u884c<\/p>\n<pre><code>jmp d20\nd22:mov cx,di\nd23:pop ax;\u5b57\u7b26\u51fa\u6808\nmov [si],al\ninc si;ds:si\u6307\u5411\u4e0b\u4e00\u5355\u5143\nloop d23\nmov al,0\nmov [si],al;\u8bbe\u7f6e\u7ed3\u5c3e\u7b260\npop di\npop si\npop dx\npop cx\npop bx\npop ax\nret\ndivdw:\npush si\npush bx\npush ax\nmov ax,dx\nmov dx,0\ndiv cx;\u88ab\u9664\u6570\u7684\u9ad8\u4f4d\/cx\nmov si,ax\npop ax \ndiv cx;(\u88ab\u9664\u6570\u9ad8\u4f4d\u7684\u5546+\u4f4e\u4f4d)\/cx\nmov cx,dx;\u4f59\u6570\u5165cx\nmov dx,si;\u9ad8\u4f4d\u7684\u5546\u5165dx\npop bx\npop si\nret\nshow_str:\npush ax\npush bx\npush es\npush si\nmov ax,0b800h\nmov es,ax\nmov ax,160\nmul dh\nmov bx,ax;bx=160*dh\nmov ax,2\nmul dl;ax=dl*2\nadd bx,ax;mov bx,(160*dh+dl*2)\u8bbe\u7f6ees:bx\u6307\u5411\u663e\u5b58\u9996\u5730\u5740\nmov al,cl;\u628a\u989c\u8272cl\u8d4b\u503cal\nmov cl,0\nshow0:\nmov ch,[si]<\/code><\/pre>\njcxz show1;(ds:si)=0\u65f6\uff0c\u8f6c\u5230show1\u6267\u884c<\/p>\n<pre><code>mov es:[bx],ch\nmov es:[bx].1,al\ninc si;ds:si\u6307\u5411\u4e0b\u4e00\u4e2a\u5b57\u7b26\u5730\u5740\nadd bx,2;es:bx\u6307\u5411\u4e0b\u4e00\u4e2a\u663e\u5b58\u5730\u5740\njmp show0\nshow1:\npop si\npop es\npop bx\npop ax\nret\ncode ends\nend start<\/code><\/pre>\n<![if !supportLists]>\n <\/div>\n<\/body>\n<\/html>\n\n","protected":false},"excerpt":{"rendered":"\u7b2c\u5341\u7ae0 CALL\u548cRET\u6307\u4ee4 &#821 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