Windows下将linux启动代码写入磁盘
1。write.c。此文件利用biosdisk可以写入软盘的任何指定扇区
#include<stdio.h>
#define SEC_MAX 1024
#define RETRY_MAX 5
#define TRACK_NUM 80 /*track number of a floppy disk*/
#define TR_SEC_NUM 18 /*sector number per track per head*/
main()
{
unsigned char buffer[512];
FILE *pFile=NULL;
int nReturn,nSec,nRetry; /*nSec is aready write sector number*/
unsigned char nSread,nTrack,nHead; /*where to write or read from floppy disk*/
if((pFile=fopen("sec3.exe","rb"))==NULL)
{
printf("\nfopen fail!");
return;
}
nSec=0;
nSread=6;
nTrack=0;
nHead=0;
while(nSec<SEC_MAX)
{
/*read sector data from file and if read error retry and then return*/
memset(buffer,0,512);
nRetry=0;
nReturn=0;
while(nReturn!=512)
{
fseek(pFile,0x200+512L*nSec,0); /*seek to where to read,there must be set long*/
nReturn=fread(buffer,1,512,pFile);
if(nRetry>RETRY_MAX) /*if error then return*/
{
if(nReturn>1)
{
;printf("\nRead file Error.Mybe get the end of file(sec=%d,nReturn=%x,nTrack=%x,nHead=%x,nSread=%x) !",nSec,nReturn,nTrack,nHead,nSread);
printf("\nRead file Error.Mybe get the end of file(sec=%d,nReturn=%x) !",nSec,nReturn);
nSec=SEC_MAX; /*get end of the file,so after write to disk,will return */
break;
}
else
{
printf("\nRead file Error.Mybe read error(sec=%d,nReturn=%x) !",nSec,nReturn);
fclose(pFile);
return;
}
}
nRetry++;
}
/*write data from buffer and if write error retry and then return*/
nRetry=0;
nReturn=1;
while(nReturn!=0)
{
nReturn=biosdisk(3, /*cmd=3,write*/
0, /*driver=0,A flopy disk*/
nHead, /*head*/
nTrack, /*track*/
nSread, /*setor*/
1,
buffer);
if(nRetry>RETRY_MAX) /*if error then return*/
{
printf("\nbiosdisk return:%d,head(%d),track(%d),sector(%d)",nReturn,nHead,nTrack,nSread);
fclose(pFile);
return;
}
nRetry++;
}
/*adjust the parameters*/
nSec++; /**/
if(++nSread>18)
{
nSread=1;
if(nHead==0) /*read current track on another head*/
{
nHead=1;
}
else /*nHead==1,read next track*/
{
nHead=0;
nTrack++;
}
}
}
fclose(pFile);
}
2。read.c.此文件利用biosdisk可以读软盘的任何指定扇区。
#include<stdio.h>
#define SEC_MAX 41
#define RETRY_MAX 5
#define TRACK_NUM 80 /*track number of a floppy disk*/
#define TR_SEC_NUM 18 /*sector number per track per head*/
main()
{
unsigned char buffer[512];
FILE *pFile=NULL;
int nReturn,nSec,nRetry; /*nSec is aready write sector number*/
unsigned char nSread,nTrack,nHead; /*where to write or read from floppy disk*/
if((pFile=fopen("sec3.bin","wb"))==NULL)
{
printf("\nfopen fail!");
return;
}
/*seek to head and write 0x200*/
fseek(pFile,0,0);
memset(buffer,0,512);
fwrite(buffer,1,512,pFile);
nSec=0;
nSread=6;
nTrack=0;
nHead=0;
while(nSec<SEC_MAX)
{
/*read data from disk and if write error retry and then return*/
memset(buffer,0,512);
nRetry=0;
nReturn=1;
while(nReturn!=0)
{
nReturn=biosdisk(2, /*cmd=3,read*/
0, /*driver=0,A flopy disk*/
nHead, /*head*/
nTrack, /*track*/
nSread, /*setor*/
1,
buffer);
if(nRetry>RETRY_MAX) /*if error then return*/
{
printf("\nbiosdisk return:%d,head(%d),track(%d),sector(%d)",nReturn,nHead,nTrack,nSread);
fclose(pFile);
return;
}
nRetry++;
}
/*read sector data from file and if read error retry and then return*/
nRetry=0;
nReturn=0;
while(nReturn!=512)
{
fseek(pFile,0x200+512*nSec,0); /*seek to where to read*/
nReturn=fwrite(buffer,1,512,pFile);
if(nRetry>RETRY_MAX) /*if error then return*/
{
if(nReturn>1)
{
printf("\nRead file Error.Mybe get the end of file(sec=%d,nReturn=%x,nTrack=%x,nHead=%x,nSread=%x) !",nSec,nReturn,nTrack,nHead,nSread);
nSec=SEC_MAX; /*get end of the file,so after write to disk,will return */
break;
}
else
{
printf("\nRead file Error.Mybe read error(sec=%d,nReturn=%x) !",nSec,nReturn);
fclose(pFile);
return;
}
}
nRetry++;
}
/*adjust the parameters*/
nSec++; /**/
if(++nSread>18)
{
nSread=1;
if(nHead==0) /*read current track on another head*/
{
nHead=1;
}
else /*nHead==1,read next track*/
{
nHead=0;
nTrack++;
}
}
}
fclose(pFile);
}
3。merge.c.此文件可以合并exe文件。编写原因是：如果想把head.asm中的main函数分出来成为一个单独的文件，那么我想把这个分出来的文件编译连接后于head.exe和为一体写入软盘，就需要这个程序将二者合并、写入软盘。
#include <stdio.h>
#include <stdlib.h>
#define RETRY_MAX 5
#define SEC_MAX 1024
main()
{
unsigned char buffer[512];
FILE *pFile3=NULL,*pFileM=NULL,*pFileB=NULL;
int nReturn,nRetry,nSec,nByte;
unsigned char bRun;
/*+++++++++++ first,copy code from sec3.exe to sec3.bin ++++++++++++*/
/*=======open two file-sec3.exe and sec3.bin=======*/
if((pFile3=fopen("sec3.exe","rb"))==NULL)
{
printf("\nfopen fail---file:sec3.exe!");
return;
}
if((pFileB=fopen("sec3.bin","wb+"))==NULL)
{
printf("\nfopen fail***file:sec3.bin!");
fclose(pFile3);
return;
}
/*=======copy code from sec3.exe to sec3.bin========*/
nSec=0;
bRun=1; /*bRun control the read loop*/
while(bRun)
{
/*read 512 data from file and if read error retry and then return*/
memset(buffer,0,512);
nRetry=0;
nReturn=0;
while(nReturn!=512)
{
fseek(pFile3,0x0000+512L*nSec,0); /*seek to where to read,and there 512L must be long*/
nReturn=fread(buffer,1,512,pFile3);
if(nRetry>RETRY_MAX) /*if error then return*/
{
printf("\nRead file(sec3.exe).Get the end of file(sec=%d,nReturn=%x)!",nSec,nReturn);
bRun=0; /*get end of the file,so after write to file sec3.exe,will return */
break;
}
nRetry++;
}
nByte=nReturn;
/*write 512 data to file and if write error retry and then return*/
nRetry=0;
nReturn=0;
while(nReturn!=nByte)
{
fseek(pFileB,0x0000+512L*nSec,0); /*seek to where to write,and there 512L is long*/
nReturn=fwrite(buffer,1,nByte,pFileB); /*will write 512B or mor less*/
if(nRetry>RETRY_MAX) /*if error then return*/
{
if(nReturn>1)
{
printf("\n**Write file Error.Mybe get the end of file(sec=%d,nReturn=%x)!",nSec,nReturn);
break;
}
else
{
printf("\n**File write error(sec=%d,nReturn=%x)!",nSec,nReturn);
fclose(pFile3);
fclose(pFileB);
return;
}
}
nRetry++;
}
nSec++;
}
/*close sec3.exe file*/
fclose(pFile3);
/*+++++++++++ secode,merge code from main.exe to sec3.bin ++++++++++++*/
/*=======open file-main.exe and sec3.bin=======*/
if((pFileM=fopen("main.exe","rb"))==NULL)
{
printf("\nfopen fail++++file:main.exe!");
fclose(pFileB);
return;
}
/*=======copy code from main.exe to sec3.bin========*/
nSec=0;
bRun=1; /*bRun control the read loop*/
while(bRun)
{
/*read 512 data from file and if read error retry and then return*/
memset(buffer,0,512);
nRetry=0;
nReturn=0;
while(nReturn!=512)
{
fseek(pFileM,0x7200+512L*nSec,0); /*seek to where to read*/
nReturn=fread(buffer,1,512,pFileM);
if(nRetry>RETRY_MAX) /*if error then return*/
{
printf("\nRead file(main.exe).Get the end of file(sec=%d,nReturn=%x)!",nSec,nReturn);
bRun=0; /*get end of the file,so after write to file sec3.exe,will break while */
break;
}
nRetry++;
}
nByte=nReturn;
/*write 512 data to file and if write error retry and then return*/
nRetry=0;
nReturn=0;
while(nReturn!=nByte)
{
fseek(pFileB,0x7200+512L*nSec,0); /*seek to where to write*/
nReturn=fwrite(buffer,1,nByte,pFileB); /*will write 512B or mor less*/
if(nRetry>RETRY_MAX) /*if error then return*/
{
if(nReturn>1)
{
printf("\n**Write file Error.Mybe get the end of file(sec=%d,nReturn=%x)!\n",nSec,nReturn);
break;
}
else
{
printf("\n**File write error(sec=%d,nReturn=%x)!",nSec,nReturn);
fclose(pFileB);
fclose(pFileM);
return;
}
}
nRetry++;
}
nSec++;
}
/*close main.exe file*/
fclose(pFileM);
/*delete and rename*/
fclose(pFileB);
system("del SEC3.EXE");
system("rename sec3.bin sec3.exe");
system("write3");
return;
}
好了，到此为止，linux的启动汇编代码就可以在windows下用tasm+tlink编译连接，用写入程序写入软盘来运行了。
