{"id":157,"date":"2017-08-11T12:15:09","date_gmt":"2017-08-11T04:15:09","guid":{"rendered":"http:\/\/www.sinkland.cn\/?p=157"},"modified":"2019-08-17T15:04:25","modified_gmt":"2019-08-17T07:04:25","slug":"smlos%e4%ba%8c-%e7%b3%bb%e7%bb%9f%e5%90%af%e5%8a%a8%e5%89%8d%e6%9c%9f%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"http:\/\/www.sinkland.cn\/?p=157","title":{"rendered":"SmlOS\u4e8c-\u7cfb\u7edf\u542f\u52a8\u524d\u671f\u5904\u7406"},"content":{"rendered":"

\u6b63\u5f0f\u8fdb\u5165\u5185\u6838<\/h3>\n

\u524d\u9762\u5df2\u7ecf\u8bf4\u660e\u4e86\u6211\u4eec\u7684bootloader<\/strong>\u5982\u4f55\u52a0\u8f7d\u78c1\u76d8\u6587\u4ef6\uff0c\u5e76\u8df3\u8f6c\u5230\u5185\u6838\u4ee3\u7801\u3002<\/p>\n

\u4e5f\u5c31\u662f\u4f1a\u6700\u7ec8\u8df3\u8f6c\u5230OsHead.nas<\/strong>\u6240\u751f\u6210\u7684\u4ee3\u7801\u4f4d\u7f6e\u3002<\/p>\n

\u6211\u4eec\u4f1a\u7528\u5c3d\u91cf\u5c11\u7684\u6c47\u7f16\u8bed\u8a00\uff0c\u4f46\u662f\u6709\u4e9b\u5fc5\u987b\u8981\u6c47\u7f16\u5b9e\u73b0\u7684\u5185\u5bb9\uff0c\u6211\u4eec\u90fd\u4f1a\u653e\u5230\u8fd9\u91cc\uff0c\u4e3a\u6b63\u5f0f\u8fdb\u5165c\u5b9e\u73b0\u7684\u7cfb\u7edf\u5185\u6838\u505a\u51c6\u5907\u3002<\/p>\n

\n

\u521d\u59cb\u5316\u663e\u793a\u76f8\u5173\u8bbe\u7f6e<\/h3>\n

VBE\u7b80\u8981\u4ecb\u7ecd<\/h4>\n

\u6709\u4e00\u4e2a\u7ec4\u7ec7\u53eb VESA\uff08\u89c6\u9891\u7535\u5b50\u6807\u51c6\u534f\u4f1a\uff09<\/strong><\/p>\n

\u4ed6\u4eec\u5236\u5b9a\u4e86\u663e\u5361\u76f8\u5173\u663e\u793a\u76f8\u5173\u6807\u51c6VBE (VESA BIOS EXTENSION)<\/strong>\uff0c\u5b9a\u4e86\u4e00\u4e9b\u663e\u5361\u76f8\u5173\u7684\u6807\u51c6\uff0c\u6bd4\u5982\u6807\u51c6\u5e94\u7528\u7a0b\u5e8f\u63a5\u53e3\uff0c\u56fe\u5f62\u63a5\u53e3\uff0c\u663e\u793a\u6a21\u5f0f\uff0c\u5237\u65b0\u7387\u7b49<\/p>\n

\u6211\u4eec\u9996\u5148\u8981\u68c0\u6d4b\u673a\u5668\u662f\u5426\u652f\u6301VBE\uff0c\u9632\u6b62\u5728\u4e0d\u517c\u5bb9\u7684\u673a\u5668\u4e0a\u8fd0\u884c\u5931\u8d25\u3002<\/p>\n

\u5f53\u7136\uff0c\u4e00\u822c\u6765\u8bb2\u73b0\u4ee3\u7684\u673a\u5668\u90fd\u662f\u652f\u6301\u7684\u3002<\/p>\n

\u68c0\u6d4b\u64cd\u4f5c:<\/p>\n

;\u786e\u8ba4VBE\u662f\u5426\u5b58\u5728\n MOV AX,0x9000\n MOV ES,AX\n MOV DI,0 ; ES:DI \u5b58\u653eVBE\u4fe1\u606f\n MOV AX,0x4f00\n INT 0x10\n CMP AX,0x004f\n JNE scrn320\n\n; \u68c0\u6d4bVBE\u7248\u672c\n MOV AX,[ES:DI+4]\n CMP AX,0x0200\n JB scrn320 ; if (AX < 0x0200) goto scrn320\n<\/code><\/pre>\n
\u6211\u4eec\u8bbe\u5b9aAX\uff0cDI\uff0cAX \u5bc4\u5b58\u5668\u5185\u5bb9\uff0c\u7136\u540e\u6267\u884c INT 0x10\u540e\uff0c\u5982\u679c\u652f\u6301VBE\uff0c\u90a3\u4e48\u673a\u5668\u4f1a\u5728AX\u5bc4\u5b58\u5668\u4e2d\u5199\u51650x004f<\/p>\n
\u68c0\u6d4b\u5982\u679c\u4e0d\u652f\u6301VBE\uff0c\u4f7f\u7528200*320\u7684\u5c4f\u5e55\u5206\u8fa8\u7387\u3002<\/p>\n
\u5982\u679c\u652f\u6301\uff0c\u5c31\u7ee7\u7eed\u68c0\u6d4bVBE\u7248\u672c\u3002<\/p>\n
\u56e0\u4e3a\u5373\u4f7f\u652f\u6301VBE\uff0c\u4e5f\u4e0d\u4e00\u5b9a\u652f\u6301\u6307\u5b9a\u5bf9\u5e94\u5c4f\u5e55\u6a21\u5f0f\uff0c\u6240\u4ee5\u5982\u679c\u4e0d\u652f\u6301\uff0c\u7ee7\u7eed\u4f4e\u5206\u8fa8\u7387\u6a21\u5f0f\u3002<\/p>\n
; \u53d6\u5f97\u753b\u9762\u6a21\u5f0f\u4fe1\u606f\n    MOV     CX,VBEMODE\n    MOV     AX,0x4f01\n    INT     0x10\n    CMP     AX,0x004f\n    JNE     scrn320\n<\/code><\/pre>\n
\u8fd9\u91cc\u53d6\u5f97\u753b\u9762\u6a21\u5f0f\u4fe1\u606f\uff0c\u8fd9\u91ccVBEMODE\u662f\u4e2a\u5b8f\u5b9a\u4e49\u3002\u76ee\u524d\u8bbe\u7f6e\u4e3a0x105\uff08\u53731024*768\uff09\u7684\u5206\u8fa8\u7387\u3002<\/p>\n
\u8fd9\u91cc\u662f\u5e38\u89c1\u7684VMEMODE\u503c:<\/p>\n\n\n\n\n\n\n\n
VBEMODE<\/th>\n\u5206\u8fa8\u7387<\/th>\n<\/tr>\n<\/thead>\n
0x103<\/td>\n800*600<\/td>\n<\/tr>\n
0x105<\/td>\n1024*768<\/td>\n<\/tr>\n
0x107<\/td>\n1280*1024<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u8c03\u7528\u6210\u529f\u540e AX=0x004f<\/p>\n
\u800c\u53d6\u5f97\u7684\u753b\u9762\u6a21\u5f0f\u4e5f\u4f1a\u88ab\u5199\u5165\u5185\u5b58ES\uff1aDI<\/strong>\u5f00\u59cb
\n\u7684256\u5b57\u8282\uff0c\u6709\u4ee5\u4e0b6\u4e2a\u91cd\u8981\u4fe1\u606f\u3002<\/p>\n\n\n\n\n\n\n\n\n\n\n
\u5730\u5740<\/th>\n\u8bf4\u660e<\/th>\n\u5176\u4ed6<\/th>\n<\/tr>\n<\/thead>\n
WORD ES\uff1aDI+0x00<\/td>\n\u6a21\u5f0f\u5c5e\u6027<\/td>\n<\/td>\n<\/tr>\n
WORD ES\uff1aDI+0x12<\/td>\nx\u5206\u8fa8\u7387<\/td>\n<\/td>\n<\/tr>\n
WORD ES\uff1aDI+0x14<\/td>\ny\u5206\u8fa8\u7387<\/td>\n<\/td>\n<\/tr>\n
BYTE ES\uff1aDI+0x19<\/td>\n\u989c\u8272\u6570<\/td>\n\u6211\u4eec\u662f8\uff0c\u4ee3\u88688\u4f4d\u8272<\/td>\n<\/tr>\n
BYTE ES\uff1aDI+0x1b<\/td>\n\u989c\u8272\u7684\u6307\u5b9a\u65b9\u6cd5<\/td>\n\u6211\u4eec\u662f4\uff0c\u4ee3\u8868\u4f7f\u7528\u8c03\u8272\u677f<\/td>\n<\/tr>\n
DWORD ES\uff1aDI+0x28<\/td>\nVARM \u663e\u5b58\u5730\u5740<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u4e0b\u9762\u6765\u786e\u8ba4\u5176\u4e2d\u4fe1\u606f\uff0c\u5728\u8fd9\u91cc\u9700\u8981\u68c0\u6d4b\u989c\u8272\u6570\uff0c\u8c03\u8272\u677f\u6a21\u5f0f\u548c\u5c5e\u6027\u6a21\u5f0f\u3002<\/p>\n
; \u753b\u9762\u6a21\u5f0f\u4fe1\u606f\u786e\u8ba4\n CMP BYTE [ES:DI+0x19],8\n JNE scrn320\n CMP BYTE [ES:DI+0x1b],4\n JNE scrn320\n MOV AX,[ES:DI+0x00]\n AND AX,0x0080\n JZ scrn320 ; \u6a21\u5f0f\u5c5e\u6027\u7684bit7\u662f0  \u6240\u4ee5\u653e\u5f03\n<\/code><\/pre>\n
\u5982\u679c\u5168\u90e8\u90fd\u652f\u6301\uff0c\u8fdb\u884c\u753b\u9762\u6a21\u5f0f\u5207\u6362\u3002<\/p>\n
;\u753b\u9762\u6a21\u5f0f\u5207\u6362\n MOV BX,VBEMODE+0x4000\n MOV AX,0x4f02\n INT 0x10\n MOV BYTE [VMODE],8 ; \u8bb0\u5f55\u4e0b\u753b\u9762\u6a21\u5f0f\n MOV AX,[ES:DI+0x12]\n MOV [SCRNX],AX\n MOV AX,[ES:DI+0x14]\n MOV [SCRNY],AX\n MOV EAX,[ES:DI+0x28]\n MOV [VRAM],EAX\n JMP keystatus\n<\/code><\/pre>\n
\u5728\u8fd9\u91cc\u8c03\u75280x10\u8fdb\u884c\u5207\u6362\u3002<\/p>\n
\u5c06\u5206\u8fa8\u7387\u4fe1\u606f\uff0c\u753b\u9762\u6a21\u5f0f\uff0cVRAM(\u663e\u5b58\u5730\u5740)\u5730\u5740\u7b49\u4fe1\u606f\u8bb0\u5f55\u5230\u6211\u4eec\u81ea\u5df1\u8bbe\u5b9a\u7684\u5185\u5b58\u4f4d\u7f6e\uff0c\u7559\u505a\u4ee5\u540e\u5907\u7528\u3002<\/p>\n
keystatus:  \n\n    MOV AH,0X02\n    INT 0X16\n    MOV [LEDS],AL       ;\u4fdd\u5b58\u952e\u76d8led\u706f\u72b6\u6001\n<\/code><\/pre>\n
\u6211\u4eec\u8fd8\u989d\u5916\u4fdd\u5b58led\u706f\u4fe1\u606f\uff0c\u4e5f\u662f\u5907\u7528\u3002<\/p>\n
\n
\u8fdb\u5165\u4fdd\u62a4\u6a21\u5f0f<\/h3>\n
\u8fd9\u53ef\u80fd\u662f\u8fd9\u91cc\u6700\u91cd\u8981\u7684\u77e5\u8bc6\u70b9\u4e86\uff0c\u8fd9\u91cc\u505a\u4e2a\u7b80\u8981\u4ecb\u7ecd\u3002<\/p>\n
\n  \u4fdd\u62a4\u6a21\u5f0f\uff08Protected Mode\uff09<\/p>\n
  \u662f\u4ece80386\u5f00\u59cb\u652f\u6301\uff0c\u533a\u522b\u4e8e\u5b9e\u6a21\u5f0f\uff08Real Mode\uff09<\/p>\n
  \u524d\u9762\u8bf4\u4e86\uff0c\u5b9e\u6a21\u5f0f\u6700\u5927\u5185\u5b58\u53ea\u652f\u63011M\uff0c\u4fdd\u62a4\u6a21\u5f0f\u5219\u652f\u63014G<\/p>\n
  \u800c\u4e14\u76f8\u6bd4\u4e8e\u5b9e\u6a21\u5f0f\u589e\u52a0\u4e86\u5185\u5b58\u4fdd\u62a4\u548c\u865a\u62df\u5185\u5b58\u5206\u9875\u7cfb\u7edf\uff0c\u589e\u52a0\u4e86\u6bb5\u95f4\u4fdd\u62a4\u673a\u5236\n<\/p><\/blockquote>\n
\u4e3a\u4e86\u8fdb\u5165\u4fdd\u62a4\u6a21\u5f0f\uff0c\u9996\u5148\u5148\u5173\u95ed\u6240\u6709\u4e2d\u65ad\uff0c\u9632\u6b62\u540e\u7eed\u64cd\u4f5c\u7684\u65f6\u5019\u4ea7\u751f\u4e2d\u65ad\u5bfc\u81f4\u51fa\u9519\u3002<\/p>\n
\u5173\u4e2d\u65ad\u6838\u5fc3\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
MOV AL,0XFF\nOUT 0X21,AL     ;\u5c4f\u853d\u4e3bpic \u4e2d\u65ad\nNOP             ;\u8fde\u7eedout\uff0c\u6709\u53ef\u80fd\u51fa\u9519\uff0cnop\u4e00\u4e0b\nOUT 0Xa1,AL     ;\u5c4f\u853d\u4ecepic\u4e2d\u65ad\nCLI             ;\u7981\u6b62CPU\u7ea7\u522b\u4e2d\u65ad\n<\/code><\/pre>\n
pic\u662f\u4ec0\u4e48<\/h4>\n
\u8fd9\u91cc\u7b80\u8981\u4ecb\u7ecd\u4e0bpic\u76f8\u5173\u3002<\/p>\n
\n  PIC(\u53ef\u7f16\u7a0b\u4e2d\u65ad\u63a7\u5236\u5668)<\/p>\n
  PIC\u5206\u4e3bPIC\u548c\u4ecePIC\uff0c\u4e3bPIC\u4e0eCPU\u76f4\u63a5\u76f8\u8fde\u3002\n<\/p><\/blockquote>\n
\"image\"<\/p>\n
\u8fd9\u662f\u4ece\u7f51\u4e0a\u627e\u7684PIC\u7684\u56fe\u7247\u3002<\/p>\n
\u53ef\u4ee5\u770b\u5230\u4ecePIC\u8fde\u63a5\u5230\u4e3bPIC\u3002<\/p>\n
\u4e3bPIC\u901a\u8fc7\u6570\u636e\u603b\u7ebf\u4e0eCPU\u76f8\u8fde\u3002<\/p>\n
\u5bf9\u4e8eCPU\u6765\u8bf4\uff0c\u4e2d\u65ad\u63a7\u5236\u5668\u8f93\u5165\u5916\u90e8\u8bbe\u5907\uff0c\u6240\u4ee5\u6211\u4eec\u4f7f\u7528out\u6307\u4ee4\u4e0e\u4e4b\u901a\u8baf\u3002<\/p>\n
\u5f53\u7136,PIC\u662f\u5f88\u53e4\u8001\u7684\u8bbe\u5907\uff0c\u73b0\u5728\u4e00\u822c\u90fd\u662fAPIC\uff0c\u4e0d\u8fc7\u8fd9\u4e9b\u8bbe\u5907\u90fd\u652f\u6301\u5411\u524d\u517c\u5bb9\uff0c\u6240\u4ee5\u6211\u4eec\u8fd8\u662f\u53ef\u4ee5\u628aAPIC\u5f53\u6210PIC\u7528\u3002<\/strong><\/p>\n
A20\u603b\u7ebf<\/h3>\n
\n  \u524d\u9762\u8bf4\u4e86\u5b9e\u6a21\u5f0f\u53ea\u80fd\u8bbf\u95ee1M\u5de6\u53f3\u7684\u5185\u5b58\uff0c\u662f\u56e0\u4e3a\u53ea\u670920\u6839\u5730\u5740\u603b\u7ebf\uff0c\u53ef\u4ee5\u8bbf\u95ee\u7684\u5730\u5740\u662f2^20=1M<\/p>\n
  \u800c\u6211\u4eec\u73b0\u5728\u7684\u53ca\u8bad\u89c9\u4e00\u822c\u90fd\u670932\u4f4d\u5730\u5740\u603b\u7ebf\uff0c\u80fd\u652f\u63014G\u5185\u5b58\u7a7a\u95f4\n<\/p><\/blockquote>\n
\u6211\u4eec\u6253\u5f00A20\u603b\u7ebf,\u8fd9\u65f6\u5019\u53ef\u4ee5\u8bbf\u95ee1MB\u4ee5\u4e0a\u5730\u5740\u3002<\/p>\n
\u6838\u5fc3\u64cd\u4f5c\u5982\u4e0b:<\/p>\n
CALL waitkbdout ;\u6e05\u7a7ai8042\u7684\u8f93\u5165\u7f13\u51b2\u533a\nMOV AL,0XD1\nOUT 0X64,AL\nCALL waitkbdout\nMOV AL,0xdf     ;\u5f00\u542fA20\u603b\u7ebf  \nOUT 0X60,AL\nCALL waitkbdout\n<\/code><\/pre>\n
\u800cwaitkbdout\u662f\u662f\u7b49\u5f85A20Gate\u547d\u4ee4\u5904\u7406\u88ab\u5b8c\u6210\u7684\u6c47\u7f16\u51fd\u6570<\/p>\n
\u7136\u540e\u8fdb\u5165\u4fdd\u62a4\u6a21\u5f0f,\u4e0d\u8fc7\u8fdb\u5165\u4fdd\u62a4\u6a21\u5f0f\u4e4b\u524d\u9700\u8981\u8bbe\u7f6e\u597d\u4fdd\u62a4\u6a21\u5f0f\u76f8\u5173\u53c2\u6570\uff0c\u624d\u80fd\u8fdb\u5165\u3002<\/p>\n
[INSTRSET \"i486p\"]  ;\u4f7f\u7528486\u6307\u4ee4\u96c6\n LGDT [GDTR0]       ; \u52a0\u8f7dGDTR\u5bc4\u5b58\u5668\uff0c\u4e34\u65f6\u8bbe\u7f6e\n MOV EAX,CR0\n AND EAX,0X7fffffff ;\u7981\u6b62\u5206\u9875\u6a21\u5f0f\n OR EAX,0X00000001  ;\u5f00\u542f\u4fdd\u62a4\u6a21\u5f0f\n MOV CR0,EAX\n\n ...\n\n ;---------------------------------------------     \nGDT0:\n    RESB    8                       ;\u7a7a\u63cf\u8ff0\u7b26\n    DW  0xffff,0x0000,0x9200,0x00cf ;32\u4f4d\u53ef\u8bfb\u5199\u6570\u636e\u6bb5\u63cf\u8ff0\u7b26   \u6bb5\u9650\u957f 4G-1\uff0c\u6bb5\u57fa\u5740\u4e3a0      \n                                    ;\u4e5f\u5c31\u662f\u8bf4\u8be5\u6bb5\u53ef\u5bfb\u57400~4G-1    DPL = 0 \u5185\u6838\u6570\u636e\u6bb5\n    DW  0xffff,0x0000,0x9a28,0x0047 ;32\u4f4d\u53ef\u8bfb\u53ef\u6267\u884c\u4ee3\u7801\u6bb5\u63cf\u8ff0\u7b26 \u6bb5\u9650\u957f512KB\uff0c\u6bb5\u57fa\u5740\u4e3a0x280000\n                                    ;DPL = 0    \u5185\u6838\u4ee3\u7801\u6bb5\n\n    DW      0\n\nGDTR0:                                      \n    DW  8*3-1                       ; GDT\u9650\u957f\n    DD  GDT0                        ; GDT\u57fa\u5740\n    ALIGNB  16\n<\/code><\/pre>\n
\u8fd9\u91cc\u5148\u52a0\u8f7dGDTR\u5bc4\u5b58\u5668\uff0c\u4f46\u8fd9\u91cc\u53ea\u662f\u4e34\u65f6\u8bbe\u7f6e\uff0c\u540e\u9762\u4f1a\u518d\u6b21\u66f4\u6539\uff0c\u8fd9\u91cc\u53ea\u662f\u4e3a\u4e86\u8fdb\u4fdd\u62a4\u6a21\u5f0f\u7684\u9700\u8981\u3002<\/p>\n
\n
\u7b80\u8981\u4ecb\u7ecdGDT\u548cIDT\u3002<\/h3>\n
GDT\uff08\u5168\u5c40\u6bb5\u53f7\u8bb0\u5f55\u8868\uff09<\/p>\n
\n  \u4f7f\u7528GDT\u53ef\u4ee5\u652f\u6301\u6bb5\u7684\u5206\u6bb5\u673a\u5236\uff0c\u8fd9\u91cc\u5fc5\u987b\u6307\u5b9a\u6bb5\u7684\u5927\u5c0f\uff0c\u8d77\u59cb\u5730\u5740\uff0c\u7ba1\u7406\u5c5e\u6027\u3002\n<\/p><\/blockquote>\n
IDT\uff08\u4e2d\u65ad\u8bb0\u5f55\u8868\uff09<\/p>\n
\n  \u4e2d\u65ad\u8868\u7528\u4e8e\u6ce8\u518c\u76f8\u5e94\u4e2d\u65ad\u5904\u7406\u7a0b\u5e8f\u7684\u6267\u884c\u5730\u5740\u3002\n<\/p><\/blockquote>\n
CR0\u5bc4\u5b58\u5668\u662fCPU\u7684\u63a7\u5236\u5bc4\u5b58\u5668\uff0c\u4fdd\u62a4\u6a21\u5f0f\u7684\u5f00\u542f\u5c31\u662f\u901a\u8fc7\u8bbe\u7f6eCR0\u5bc4\u5b58\u5668\u7684\u503c\u6765\u5b9e\u73b0\u7684\u3002<\/p>\n
\u66f4\u6539cr0\uff0c\u5c31\u6b63\u5f0f\u8fdb\u5165\u4e86\u4fdd\u62a4\u6a21\u5f0f\u3002<\/p>\n
 JMP protectMode ;\u5207\u6362\u5230\u4fdd\u62a4\u6a21\u5f0f\uff0c\u6307\u4ee4\u89e3\u91ca\u53d8\u5316\uff0c\u5fc5\u987b\u7acb\u9a6c\u8df3\u8f6c\n\u8fdb\u5165\u4fdd\u62a4\u6a21\u5f0f\u4e4b\u540e\uff0c\u9996\u5148\u5bf9\u6bb5\u5bc4\u5b58\u5668\u8fdb\u884c\u521d\u59cb\u5316\u8bbe\u7f6e\u3002\n;\u8fdb\u5165\u4fdd\u62a4\u6a21\u5f0f\nprotectMode:\n MOV AX,1*8 ; \u91cd\u65b0\u8bbe\u7f6e\u6bb5\u5bc4\u5b58\u5668\n MOV DS,AX ; DS, ES, FS, GS, SS\u90fd\u6307\u5411GDT\u4e2d\u7684\u5185\u6838\u6570\u636e\u6bb5\u63cf\u8ff0\u7b26\n MOV ES,AX\n MOV FS,AX\n MOV GS,AX\n MOV SS,AX\n<\/code><\/pre>\n
\u5728\u5207\u6362\u5230\u4fdd\u62a4\u6a21\u5f0f\u4e4b\u540e\uff0c\u5fc5\u987b\u7acb\u9a6c\u6267\u884c\u8df3\u8f6c\uff0c\u8fd9\u91cc\u4e3a\u4ec0\u4e48\u8981Jmp\uff0c\u662f\u56e0\u4e3a\u5207\u6362\u5230\u4fdd\u62a4\u6a21\u5f0f\u4e4b\u540e\uff0cCPU\u7684\u89e3\u91ca\u6a21\u5f0f\u53d1\u751f\u7684\u53d8\u5316\uff0c\u5f00\u59cb\u5728\u6267\u884c\u524d\u4e00\u6761\u6307\u4ee4\u7684\u65f6\u5019\u89e3\u91ca\u4e0b\u4e00\u6761\u6216\u591a\u6761\u6307\u4ee4\u3002<\/p>\n
\u6240\u4ee5\u6a21\u5f0f\u5207\u6362\u540e\uff0c\u5fc5\u987b\u9a6c\u4e0a\u8df3\u8f6c\u3002<\/p>\n
\n
\u590d\u5236C\u8bed\u8a00\u5b9e\u73b0\u7684\u7cfb\u7edf\u5185\u6838\u4ee3\u7801<\/h3>\n
\u7136\u540e\u8fdb\u884c\u590d\u5236\u64cd\u4f5c\uff0c\u590d\u5236\u5185\u6838\u4ee3\u7801\uff08\u5373\u7528\u4e4b\u540e\u7528C\u8bed\u8a00\u5b9e\u73b0\u7684\u7cfb\u7edf\u5185\u6838\uff09<\/p>\n
\u8fd9\u91cc\u6307\u5b9a\u7684\u5185\u6838\u4ee3\u7801\u6bb5\u7684\u5185\u5b58\u57fa\u5730\u5740\u662f0x00280000\u3002<\/p>\n
\u9996\u5148\u590d\u5236\u5185\u6838512K\u5230\u57fa\u5730\u5740\uff0c\u5f53\u7136512K\u8fdc\u8fdc\u5927\u4e8e\u5185\u6838\u6587\u4ef6\u7684\u5927\u5c0f\uff0c\u6240\u4ee5512k\u5df2\u7ecf\u591f\u7528\u4e86\u3002<\/p>\n
\u540e\u9762\u4e00\u6bb5\u662f\u5c06\u6574\u4e2a\u5728boot.nas\u65f6\u8bfb\u53d6\u7684\u6240\u6709\u6247\u533a\u6570\u636e\u5168\u90e8\u590d\u5236\u52301M\uff080x00100000\uff09\u4e4b\u540e\u7684\u5730\u65b9\u53bb\u3002<\/p>\n
    MOV     ESI,bootpack    ;\u6e90\u5730\u5740\n    MOV     EDI,BOTPAK      ;\u76ee\u7684\u5730\u5740\n    MOV     ECX,512*1024\/4  ;\u590d\u5236\u7684\u5927\u5c0f\uff0c512K\n    CALL    memcpy  \n;----------------------------------------------\n;\u5c06\u4ee3\u7801\u590d\u5236\u52300x00100000\n    MOV     ESI,0x7c00      \n    MOV     EDI,DSKCAC      \n    MOV     ECX,512\/4\n    CALL    memcpy\n;----------------------------------------------\n;\u5c06\u4ece\u6620\u50cf\u4e2d\u8bfb\u5165\u7684\u6570\u636e\u4ece0x8200\u5904\u590d\u5236\u52300x00100200\u5904\n    MOV     ESI,DSKCAC0+512 \n    MOV     EDI,DSKCAC+512  \n    MOV     ECX,0\n    MOV     CL,BYTE [CYLS]  \n    IMUL    ECX,512*18*2\/4\n    SUB     ECX,512\/4   \n    CALL    memcpy\n...\n\n; \u5c06DS:ESI\u590d\u5236\u5230ES:EDI\u5730\u5740\nmemcpy:\n    MOV     EAX,[ESI]       \n    ADD     ESI,4\n    MOV     [EDI],EAX\n    ADD     EDI,4\n    SUB     ECX,1\n    JNZ     memcpy          \n    RET \n<\/code><\/pre>\n
\u4e00\u5207\u590d\u5236\u5b8c\u6bd5\u4e4b\u540e\uff0c\u6b63\u5f0f\u542f\u52a8c\u5b9e\u73b0\u7684\u5185\u6838\u3002<\/p>\n
;\u5185\u6838\u7684\u542f\u52a8\n    ...\n JZ skip ; \u6ca1\u6709\u8981\u4f20\u9001\u7684\u6570\u636e\u65f6\n    ...\nskip:\n  MOV ESP,[EBX+12] ; \u6808\u521d\u59cb\u503c ESP = 0x310000\n  JMP DWORD 2*8:0x0000001b\n<\/code><\/pre>\n
\u5728\u7528C\u8bed\u8a00\u751f\u6210\u7684\u5185\u6838\u6587\u4ef6\u4e2d\uff0c\u6587\u4ef6\u5934\u90e8\u5e76\u975e\u4ee3\u7801\u6bb5\u7684\u5934\u90e8\uff0c\u9700\u8981\u6587\u4ef6\u5934\u90e8\u4fe1\u606f\uff0c\u8ba1\u7b97\u51fa\u5185\u6838\u6587\u4ef6\u4ee3\u7801\u6bb5\u7684\u5927\u5c0f\uff0c\u590d\u5236\u5230\u6307\u5b9a\u7684\u5185\u5b58\u533a\u5757\uff0c\u7136\u540e\u518d\u8df3\u8f6c\u5230\u6307\u5b9a\u7684\u5185\u6838\u57fa\u5740\u3002<\/p>\n
\u5e76\u5728\u6700\u540e\u6307\u5b9a\u4e86\u5185\u6838\u6808\uff0c\u5373\u6307\u5b9aESP\u7684\u503c\uff0c\u8fd9\u91cc\u662f0x310000\u3002<\/p>\n
\u6700\u540e\u5728\u8df3\u8f6c\u5230\u7b2c\u4e8c\u4e2a\u6bb5\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u5728\u4e34\u65f6gdt\u4e2d\u6307\u5b9a\u7684\u6bb5\uff0c\u5e76\u4e14\u504f\u79fb0x0000001b\u5f00\u59cb\u6267\u884c\u3002<\/p>\n
\u4e5f\u5c31\u662f\u5185\u5b58\u5730\u57400x280000 + 1b\u7684\u4f4d\u7f6e\u3002<\/p>\n
\u81f3\u6b64\uff0c\u8df3\u5165C\u8bed\u8a00\u7684\u5185\u6838\u4ee3\u7801\u533a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6b63\u5f0f\u8fdb\u5165\u5185\u6838 \u524d\u9762\u5df2\u7ecf\u8bf4\u660e\u4e86\u6211\u4eec\u7684bootloader\u5982\u4f55\u52a0\u8f7d\u78c1\u76d8\u6587\u4ef6\uff0c\u5e76\u8df3\u8f6c\u5230\u5185\u6838\u4ee3\u7801\u3002 \u4e5f\u5c31\u662f\u4f1a\u6700\u7ec8\u8df3\u8f6c\u5230 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"_links":{"self":[{"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=\/wp\/v2\/posts\/157"}],"collection":[{"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=157"}],"version-history":[{"count":3,"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=\/wp\/v2\/posts\/157\/revisions"}],"predecessor-version":[{"id":189,"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=\/wp\/v2\/posts\/157\/revisions\/189"}],"wp:attachment":[{"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=157"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=157"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.sinkland.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=157"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}