读写硬盘扇区的C语言程序知识讲解

读写硬盘扇区的C语言程序读写硬盘的MBR和DBR扇区的程序。

/******************************************* * Master Boot Record Programme: ** Backup the Master Boot Sector ** Fix the Master Boot Sector ** Change the Partition Table ** -- by Crystal.Mouse 04/30/99 -- ** Turboc 2.0 ********************************************/ #include <ctype.h>#include <stdlib.h>#include <stdio.h>#include <bios.h>#include <io.h>#include <dos.h>#include <fcntl.h>#include <sys\stat.h>#include <conio.h>/* define the */char buff[512]; /*buffer for master boot sector *//* buffer1 backup for master boot sector */char buff1[512];/* This is the dos boot programme data */char sector2[512]={0xEB,0x3C,0x90,0x4D,0x53,0x57,0x49,0x4E,0x34,0x2E,0x31,0x00, 0x02,0x20,0x01,0x00,0x02,0x00,0x02,0x00,0x00,0xF8,0xC9,0x00,0x3F,0x00,0x40,0x00,0x3F,0x00,0x00,0x00,0x01,0x0A,0x19,0x00,0x80,0x00,0x29,0xDC,0x12,0x6F,0x04,0x30,0x34,0x32,0x36,0x39,0x39,0x20,0x20,0x20,0x20,0x20,0x46,0x41,0x54,0x31,0x36,0x20,0x20,0x20,0xFA,0x33,0xC9,0x8E,0xD1,0xBC,0xFC,0x7B,0x16,0x07,0xBD,0x78,0x00,0xC5,0x76,0x00,0x1E,0x56,0x16,0x55,0xBF,0x22,0x05,0x89,0x7E,0x00,0x89,0x4E,0x02,0xB1,0x0B,0xFC,0xF3,0xA4,0x06,0x1F,0xBD,0x00,0x7C,0xC6,0x45,0xFE,0x0F,0x8B,0x46,0x18,0x88,0x45,0xF9,0x38,0x4E,0x24,0x7D,0x22,0x8B,0xC1,0x99,0xE8,0x77,0x01,0x72,0x1A,0x83,0xEB,0x3A,0x66,0xA1,0x1C,0x7C,0x66,0x3B,0x07,0x8A,0x57,0xFC,0x75,0x06,0x80,0xCA,0x02,0x88,0x56,0x02,0x80,0xC3,0x10,0x73,0xED,0x33,0xC9,0x8A,0x46,0x10,0x98,0xF7,0x66,0x16,0x03,0x46,0x1C,0x13,0x56,0x1E,0x03,0x46,0x0E,0x13,0xD1,0x8B,0x76,0x11,0x60,0x89,0x46,0xFC,0x89,0x56,0xFE, 0xB8,0x20,0x00,0xF7,0xE6,0x8B,0x5E,0x0B,0x03,0xC3,0x48,0xF7, 0xF3,0x01,0x46,0xFC,0x11,0x4E,0xFE,0x61,0xBF,0x00,0x07,0xE8, 0x23,0x01,0x72,0x39,0x38,0x2D,0x74,0x17,0x60,0xB1,0x0B,0xBE, 0xD8,0x7D,0xF3,0xA6,0x61,0x74,0x39,0x4E,0x74,0x09,0x83,0xC7, 0x20,0x3B,0xFB,0x72,0xE7,0xEB,0xDD,0xBE,0x7F,0x7D,0xAC,0x98, 0x03,0xF0,0xAC,0x84,0xC0,0x74,0x17,0x3C,0xFF,0x74,0x09,0xB4, 0x0E,0xBB,0x07,0x00,0xCD,0x10,0xEB,0xEE,0xBE,0x82,0x7D,0xEB, 0xE5,0xBE,0x80,0x7D,0xEB,0xE0,0x98,0xCD,0x16,0x5E,0x1F,0x66, 0x8F,0x04,0xCD,0x19,0xBE,0x81,0x7D,0x8B,0x7D,0x1A,0x8D,0x45, 0xFE,0x8A,0x4E,0x0D,0xF7,0xE1,0x03,0x46,0xFC,0x13,0x56,0xFE, 0xB1,0x04,0xE8,0xC1,0x00,0x72,0xD6,0xEA,0x00,0x02,0x70,0x00, 0xB4,0x42,0xEB,0x2D,0x60,0x66,0x6A,0x00,0x52,0x50,0x06,0x53, 0x6A,0x01,0x6A,0x10,0x8B,0xF4,0x74,0xEC,0x91,0x92,0x33,0xD2, 0xF7,0x76,0x18,0x91,0xF7,0x76,0x18,0x42,0x87,0xCA,0xF7,0x76, 0x1A,0x8A,0xF2,0x8A,0xE8,0xC0,0xCC,0x02,0x0A,0xCC,0xB8,0x01, 0x02,0x8A,0x56,0x24,0xCD,0x13,0x8D,0x64,0x10,0x61,0x72,0x0A, 0x40,0x75,0x01,0x42,0x03,0x5E,0x0B,0x49,0x75,0x77,0xC3,0x03, 0x18,0x01,0x27,0x0D,0x0A,0x49,0x6E,0x76,0x61,0x6C,0x69,0x64,0x20,0x73,0x79,0x73,0x74,0x65,0x6D,0x20,0x64,0x69,0x73,0x6B,0xFF,0x0D,0x0A,0x44,0x69,0x73,0x6B,0x20,0x49,0x2F,0x4F,0x20,0x65,0x72,0x72,0x6F,0x72,0xFF,0x0D,0x0A,0x52,0x65,0x70,0x6C,0x61,0x63,0x65,0x20,0x74,0x68,0x65,0x20,0x64,0x69,0x73,0x6B,0x2C,0x20,0x61,0x6E,0x64,0x20,0x74,0x68,0x65,0x6E,0x20,0x70,0x72,0x65,0x73,0x73,0x20,0x61,0x6E,0x79,0x20,0x6B,0x65,0x79,0x0D,0x0A,0x00,0x00,0x49,0x4F,0x20,0x20,0x20,0x20,0x20,0x20,0x53,0x59,0x53,0x4D,0x53,0x44,0x4F,0x53,0x20,0x20,0x20,0x53,0x59,0x53,0x7F,0x01,0x00,0x41,0xBB,0x00,0x07,0x80,0x7E,0x02,0x0E,0xE9,0x40,0xFF,0x00,0x00,0x55,0xAA};/* sector1 is the Master boot program data */char sector1[512]={0xFA,0x33,0xC0,0x8E,0xD0,0xBC,0x00,0x7C,0x8B,0xF4,0x50,0x07, 0x50,0x1F,0xFB,0xFC,0xBF,0x00,0x06,0xB9,0x00,0x01,0xF2,0xA5,0xEA,0x1D,0x06,0x00,0x00,0xB8,0x01,0x02,0xBB,0x00,0x08,0xB9,0x01,0x00,0xBA,0x80,0x00,0xCD,0x13,0xBF,0x00,0x06,0xBE,0x00,0x08,0xB9,0x00,0x01,0xFC,0xF3,0xA7,0x74,0x14,0xBE,0x17,0x07,0xE8,0x2F,0x01,0xB8,0x01,0x03,0xBB,0x00,0x06,0xB9,0x01,0x00,0xBA,0x80,0x00,0xCD,0x13,0xBE,0xBE,0x07,0xB3,0x04,0x80,0x3C,0x80,0x74,0x0E,0x80,0x3C,0x00,0x75,0x1C,0x83,0xC6,0x10,0xFE,0xCB,0x75,0xEF,0xCD,0x18,0x8B,0x14,0x8B,0x4C,0x02,0x8B,0xEE, 0x83,0xC6,0x10,0xFE,0xCB,0x74,0x0D,0x80,0x3C,0x00,0x74,0xF4, 0xBE,0xAE,0x06,0xE8,0xF0,0x00,0xEB,0xFE,0xBF,0x05,0x00,0xBB, 0x00,0x7C,0xB8,0x01,0x02,0x57,0xCD,0x13,0x5F,0x73,0x0C,0x33, 0xC0,0xCD,0x13,0x4F,0x75,0xED,0xBE,0xD2,0x06,0xEB,0xE0,0xBE, 0xF7,0x06,0xBF,0xFE,0x7D,0x81,0x3D,0x55,0xAA,0x75,0xD4,0x8B, 0xF5,0xEA,0x00,0x7C,0x00,0x00,0x49,0x6E,0x76,0x61,0x6C,0x69, 0x64,0x20,0x70,0x61,0x72,0x74,0x69,0x74,0x69,0x6F,0x6E,0x20, 0x74,0x61,0x62,0x6C,0x65,0x2E,0x20,0x4F,0x68,0x2C,0x6D,0x79, 0x20,0x67,0x6F,0x64,0x21,0x00,0x45,0x72,0x72,0x6F,0x72,0x20, 0x6C,0x6F,0x61,0x64,0x69,0x6E,0x67,0x20,0x6F,0x70,0x65,0x72, 0x61,0x74,0x69,0x6E,0x67,0x20,0x73,0x79,0x73,0x74,0x65,0x6D, 0x2E,0x20,0x57,0x68,0x79,0x3F,0x00,0x4D,0x69,0x73,0x73,0x69, 0x6E,0x67,0x20,0x6F,0x70,0x65,0x72,0x61,0x74,0x69,0x6E,0x67, 0x20,0x73,0x79,0x73,0x74,0x65,0x6D,0x2E,0x20,0x53,0x68,0x69, 0x74,0x21,0x00,0x4D,0x61,0x73,0x74,0x65,0x72,0x20,0x42,0x6F, 0x6F,0x74,0x20,0x53,0x65,0x63,0x74,0x6F,0x72,0x20,0x63,0x68, 0x61,0x6E,0x67,0x65,0x64,0x2E,0x0A,0x0D,0x44,0x6F,0x6E,0x27, 0x74,0x20,0x77,0x6F,0x72,0x72,0x79,0x2C,0x49,0x20,0x68,0x61,0x76,0x65,0x20,0x72,0x65,0x63,0x6F,0x76,0x65,0x72,0x65,0x64,0x20,0x69,0x74,0x21,0x20,0x43,0x6C,0x65,0x76,0x65,0x72,0x21,0x20,0x45,0x54,0x2D,0x4D,0x6F,0x75,0x73,0x65,0x20,0x59,0x65,0x61,0x68,0x21,0x0A,0x0D,0x00,0xAC,0x3C,0x00,0x74,0x0B,0x56,0xBB,0x07,0x00,0xB4,0x0E,0xCD,0x10,0x5E,0xEB,0xF0,0xC3,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x55,0xAA};char fnwrite[20],fnread[20]; /* filename */FILE *fp; /* file pointer */int head,cylinder,sector,drive; /* harddisk head,cylinder sector drive *//* define the key code */#define ESC 0x011b#define LEFT 0x4b00#define RIGHT 0x4d00#define UP 0x4800#define DOWN 0x5000#define HOME 0x4700#define END 0x4f00#define PGUP 0x4900#define PGDN 0x5100#define F2 0x3c00#define F1 0x3b00#define W 1#define R 0 /* flag for */#define D 0 /* flag for Dos Boot Sector */#define M 1 /* flag for Master Boot Sector */ /* declare the function */int fileopen(int f,char *file); /*Read or Creat the backupfile */int writembr(char *file); /* write the buffer to master boot sector */ int writedbr(char *file); /* write the buffer to dos boot sector */int backupmbr(char *file); /* backup the Master Boot record data */ int backupdbr(char *file); /* backup the dos boot sector data */ int printmbr(); /* print the master boot sector */int init(int f); /* init the operating */void help(); /*help*/void title(); /* display the infomation */int copypart(char *src,char *dest);void infina(char *file); /* open or creat the backup file */void closecur(); /* close the cursor */void opencur(); /* open the cursor */int display(); /* display the data */void interrupt(*reset)(); /* interrupt reset the machine */void resetwin(); /* reset the screen */void search(); /* search the dos boot sector */int detect(int num,int driver,int f); /* detect the drive */int detect(int num,int driver,int f)/* detect the disk */{union REGS r;r.h.ah=num;r.h.dl=driver;int86(0x13,&r,&r);if(f)return r.h.al;elsereturn r.x.cflag;}/* backup the dos boot sector */int backupdbr(char *file){int flag=1; /* flag for success or not */ if(!fileopen(W,file)){printf("\nBackup file write error!"); flag=0;}return flag;}/* rewrite the dos boot record */int writedbr(char *file){int flag; /* flag for success or not */char key;search(); /* search the the dos boot sector: head , cylinder and sector */ init(D); /* initialize the dos boot sector data to the buffer */printf("\nWarning...");printf("\nIt might destory your harddisk!");printf("\nDo you want to a backup?(y/n)");key=getch();switch(key){case 'y':case 'Y':infina(fnwrite); /* input the backup filename */if(!backupdbr(fnwrite))printf("\nBackup error!");flag=0;break;}case 'n':case 'N':if(!fileopen(R,file)) /* open the existed backup file data to buffer */ {printf("\nBackup file %s open error!",file);flag=0;return flag;}}/* rewrite the dos boot sector with the buffer data */if(biosdisk(0x03,0x80,head,cylinder,sector,1,buff1)){printf("\nWrite Master Boot Sector error!");flag=0;else{printf("\nWrite Dos Boot Sector OK!");flag=1;}}/* backup the Master Boot Sector data to file */int backupmbr(char *file){int flag=1;init(M); /* initialize the master boot sector to the buffer */ if(!fileopen(W,file)){printf("\nBackup file write error!");flag=0;}return flag;}int fileopen(int f,char *file)/* f for read or creat file */{int flag=1;if(f==0){if((fp=fopen(file,"rb"))!=NULL) {fread(buff1,512,1,fp);fclose(fp);}else flag=0;}if(f==1){if((fp=fopen(file,"wb"))!=NULL) {fwrite(buff,512,1,fp);fclose(fp);}else flag=0;}return flag;}int writembr(char *file){int flag=1;char key;printf("\nWarning...");printf("\nIt might destory your harddisk!"); printf("\nDo you want to a backup?(y/n)"); key=getch();switch(key){case 'y':case 'Y':infina(fnwrite);init(M); /* initialize the MBR to buffer */if(!backupmbr(fnwrite)) /* backup the MBR */{printf("\nBackup error!");flag=0;}printf("\nFile %s backup ok!",fnwrite);if(!biosdisk(0x03,0x80,0,0,3,1,buff))printf("\nThe old MBR write to head:0 , Cylinder:0 ,Sector:1 error!");if(!biosdisk(0x03,0x80,0,0,5,1,buff))printf("\nThe old MBR write to head:0 , Cylinder:0 ,Sector:1 error!");printf("\nThe old MBR also backup to the harddisk side 0 cylinder 0 sector 3 and 5."); flag=1;case 'n':case 'N':if(!fileopen(R,file)) /* open the existed backup file */{printf("\nBackup file %s open error!",file);flag=0;return flag;}}if(biosdisk(0x03,0x80,0,0,1,1,buff1)) /* Rewrite the MBR with buffer1 */ {printf("\nWrite Master Boot Sector error!");flag=0;}else{printf("\nWrite Master Boot Sector OK!");flag=1;}return flag;}int init(int f){int result=1;for(i=0;i<512;i++) /* initialize the buffer */buff[i]=0;if(f){if(biosdisk(0x02,0x80,0,0,1,1,buff)) /* read the Mbr to buffer */ {printf("\nMaster boot record read error!");result=0;}}else if(biosdisk(0x02,0x80,head,cylinder,sector,1,buff)){printf("\nDos Boot Sector read error!");result=0;}return result;}{int far *res=(int far *)0x472; /* the data for reset */int i,j,k;char key;reset=MK_FP(0xffff,0x0000); /* reset interrupt address */ clrscr();while(1){printf("\nSetMbr programme...('h' for help)");printf("\n.");key=getch();printf("%c",key);switch(key){case 'H':case 'h':help();break;/* rewrite the MBR sector */case 'w':case 'W':infina(fnread); /* input the existed file name */ if(!writembr(fnread)){printf("\nWrite HardDisk MBR error!");printf("\nPress 'v' to check it.");printf("\nPress 'm' to fix it.");}elseprintf("\nWrite HardDisk MBR OK!");break;/* backup the MBR sector */case 'b':case 'B':infina(fnwrite);if(!backupmbr(fnwrite))printf("\nBackup MBR error!");elseprintf("\nBackup MBR OK!");break;/* rewrite the dos boot sector */case 'd':case 'D':infina(fnread);if(!writedbr(fnread)){printf("\nWrite Dos Boot Sector error!");printf("\nPress 'v' to view the Dos Boot Sector!"); break;}break;/* backup the dos boot sector */case 'o':case 'O':infina(fnwrite);search();if(!backupdbr(fnwrite))printf("\nBackup Dos Boot Sector error!");elseprintf("\nBackup Dos Boot Sector OK!");break;/* rewrite the dos boot sector with default data */ case 'i':case 'I':search();init(D);printf("\nIt would modify the Dos Boot secotr!"); printf("\nDo you want to backup?(Y/N)");key=getch();if(key=='y' || key=='Y'){infina(fnwrite);if(!backupmbr(fnwrite))printf("\nBackup Error!");printf("\nBackup OK!");}elseif(key=='n' || key=='N')printf("\nWarning:it would modify the Dos Boot Sector!"); /* write the sector2 to the dos boot sector */if(biosdisk(0x03,0x80,head,cylinder,sector,1,sector2)!=0) printf("\nDos Boot Sector Write error!");elseprintf("\nDos Boot Sector Write OK!");break;/* reset the machine */case 'r':case 'R':*res=0x1234;(*reset)();/* view the harddisk sector data */case 'v':search();printmbr();break;/* fixed the flappy boot sector */case 'f':case 'F':printf("\nWhich dekette? -> (A,B,...):"); key=getch();printf("%1c:",key);if(key>=97)key=key-97;elsekey=key-65;/* if(detect(0x10,key,0)){printf("\nDriver %1c: not ready!",key+65);break;}if(detect(0x13,key,1)==0x03){printf("\nDriver %1c: write protect!",key+65);break;}else */if(biosdisk(0x03,key,0,0,1,1,sector2))printf("\nDriver %c: write error!",key+65);elseprintf("\nDrive %1c: write OK!",key+65); break;/* fixed the MBR with default data */case 'm':case 'M':printf("\nIt would modify the Master Boot Record.");printf("\nDo you want to backup?(Y/N)");key=getch();printf("%1c",key);if(key=='y' || key=='Y'){infina(fnwrite);if(!backupmbr(fnwrite)){printf("\nBackup Error!");break;}}elseif(key=='n' || key=='N')printf("\nWarning:it would modify the Master Boot Sector!");init(M);if((buff[0x1be]&0x00ff)==0x80 || (buff[0x1be+16]&0x00ff)==0x80|| (buff[0x1be+32]&0x00ff)==0x80 || (buff[0x1be+48]&0x00ff)==0x80) copypart(buff+0x1be,sector1+0x1be);if(biosdisk(0x03,0x80,0,0,1,1,sector1)){printf("\nHardDisk Write error!");break;}else{printf("\nHardDisk Write OK!"); printf("\nPress 'v' to check it."); }break;/* dos shell */case 's':case 'S':printf("\nPress 'Exit' to return...."); system("");break;/* exit */case 'q':case 'Q':title();return 1;/* print the undefine command */default:printf("%cBad command!",27);}}}/* display the information */void title(){printf("\nThank you for using the programme...");printf("\nProgrammer:Crystal.Mouse");printf("\nDate:05/01/1999");}/* change the destination partition table data with the source data */ int copypart(char *src,char *dest){char len=0x40;while(len>=0){*(dest+len)=*(src+len);len--;}}/* input the filename */void infina(char *file){printf("\nPlease input the file name:"); scanf("%s",file);}void search(){int i,addr;init(M);for(i=0x1be;i<0x1fe;i++)if((buff[i]&0x00ff)==0x80){addr=i;break;}head=buff[addr+1];sector=(buff[addr+2]<<2)>>2;cylinder=(buff[addr+2]>>6)*256+buff[addr+3]; }/* close the cursor */void closecur(){union REGS r;r.h.ah=1;r.h.ch=0x20;int86(0x10,&r,&r);}/* open the cursor */void opencur(){union REGS r;r.h.ah=1;r.h.ch=12;r.h.cl=13;int86(0x10,&r,&r);}void help(){printf("\n\tMaster Boot sector backup programme...");printf("\n\tH: help.");printf("\n\tW: ReWrite the Master Boot Record from a file."); printf("\n\tB: Backup the Master Boot Record to a file.");printf("\n\tO: Save the Dos Boot Sector to a file.");printf("\n\tD: Rewrite the Dos Boot Sector from a file.");printf("\n\tI: Rewrite the Dos Boot Sector with a default."); printf("\n\tV: View the Master Boot Record.");printf("\n\tF: Fixed the floppy Boot Sector.");printf("\n\tM: The same with Command:'Fdisk /mbr'.");printf("\n\tS: Dos shell.");printf("\n\tQ: Exit the programme.");printf("\n Press any key to continue...");getch();sound(2000);delay(2000);nosound(); }/* print the mbr */int printmbr(){int count=1;int key;int f=0;closecur();init(M);display(count,&f);while(bioskey(1)==0); key=bioskey(0);while(1){switch(key){case ESC:return 1;case HOME: count=1;f=0;break;case END: count=63; f=0;break;case PGUP: case UP:case LEFT: if(count<=1) count=63; elsecount--;f=0;break;case DOWN: case RIGHT: if(count>=63) count=1;elsecount++;f=0;break;case F2:if(f==0){f=1;break;}if(f==1){f=0;break;}case F1:resetwin();printf("\nIt would save the sector to a file...");if(f){ if(biosdisk(0x02,0x80,head,cylinder,sector,1,buff)!=0) {printf("\nharddisk Dos Boot Sector read error!");break;}}elseif(biosdisk(0x02,0x80,0,0,count,1,buff)){printf("\nHardDisk MBR read error!");break;}infina(fnwrite);if(!fileopen(W,fnwrite))printf("\nFile %s Write error!",fnwrite); else{printf("\nFile %s save OK.",fnwrite); printf("\nPress any key to return..."); getch();}break;default:break;}display(count,f);while(bioskey(1)==0);key=bioskey(0);}}/* reset the screen */void resetwin(){window(1,1,80,25);textcolor(WHITE);textbackground(BLACK);clrscr();}/* put the buffer data to the screen */int display(int count,int f){int lines,i;resetwin();closecur();i=count;if(f){if(biosdisk(0x02,0x80,head,cylinder,sector,1,buff)) {printf("\nHarddisk read error!");resetwin();}}elseif(biosdisk(0x02,0x80,0,0,count,1,buff)){printf("\nHarddisk read error!");resetwin();return 0;}window(1,25,80,25);textbackground(CYAN);textcolor(WHITE);clrscr();cprintf(" HELP:ESC PGUP PGDN HOME END %c %c %c %c %c ",24,26,25,27,179); textcolor(RED);cprintf("F1");textcolor(WHITE);cprintf(":Save this sector to a file.");cprintf(" 05/01/99");window(1,1,80,1);textbackground(LIGHTGRAY);textcolor(LIGHTGREEN);clrscr();cprintf(" HardDisk C:1 %c 63 Sector",196);if(f)cprintf(" ( DOS BOOT SECTOR ) By: Howard.Crystal "); elsecprintf(" (Hard Disk Partition Table) By: Howard.Crystal "); window(1,2,80,24);textbackground(BLUE);textcolor(WHITE);clrscr();gotoxy(1,1);if(!f){cprintf(" Head:%-d Cylinder:%-d Sector:%-d",0,0,i);cprintf(" F2: View Dos Boot Sector\n");}else{cprintf(" Head:%-d Cylinder:%-d Sector:%-d",head,cylinder,sector); cprintf(" F2: View Master Boot Sector\n");}lines=1;gotoxy(1,1);for(i=0;i<512;i++){if(i%24==0){lines++;gotoxy(1,lines);}if(i%4==0)cprintf(" ");if(f)if(buff[510]==0x55 && (buff[511]&0x00ff)==0xaa)if(i>=510){textattr(RED+(BLUE<<4)+BLINK); /* flash the special data */sound(1000);delay(1000);nosound();cprintf("%02x",buff[i]&0x00ff);textcolor(WHITE);}elsecprintf("%02x",buff[i]&0x00ff);elsecprintf("%02x",buff[i]&0x00ff);elseif(buff[510]==0x55 && (buff[511]&0x00ff)==0xaa)if(i>=0x1be && (((i-0x1be)%16==0 && (buff[i]&0x00ff)==0x80) || (buff[i]&0x00ff)==0x55 || (buff[i]&0x00ff)==0xaa)){textattr(RED+(BLUE<<4)+BLINK);cprintf("%02x",buff[i]&0x00ff);delay(1000);nosound();textcolor(WHITE);}elsecprintf("%02x",buff[i]&0x00ff);elsecprintf("%02x",buff[i]&0x00ff); }lines=1;for(i=0;i<512;i++){if(i%24==0)lines++;gotoxy(57+i%24,lines);if(isprint(buff[i]))cprintf("%1c",buff[i]);else}return 1; }。