怎样在磁盘指定区域写入数据？如c中的biosdisk

Question

？？

Answer 1

（转贴）用C++ BUILDER 编写如下的程序来读区物理磁盘的绝对扇区,对软盘可用,但对硬盘不管用
不知问题出在哪里,请各位指教:
void __fastcall TForm1::Button1Click(TObject *Sender)
{
        DWORD w;
        int v;
        hDevice=CreateFile("\\\\.\\VWIN32",GENERIC_WRITE|GENERIC_READ,FILE_SHARE_READ|FILE_SHARE_WRITE,
        NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
        if(hDevice!=NULL)
        {  w=1;
           w=w<<8;
           v=0x80;
           reg.reg_EAX=0x440D;
           reg.reg_EBX=v|w;
           reg.reg_ECX=0x084B;
           reg.reg_EDX=1;
           reg.reg_Flags=0x0001;
          fresult=DeviceIoControl(hDevice,VWIN32_DIOC_DOS_IOCTL,?,sizeof(reg),?,sizeof(reg),&cb1,0);
           if(!fresult||(reg.reg_Flags & 0x0001))
              ShowMessage("Fail1");
           reg.reg_EAX=0x0201; //读硬盘的0面0柱面1扇区,数量为一扇区.
           reg.reg_EBX=(DWORD)&boot; //定义为 BYTE boot[512];
           reg.reg_ECX=0x0001;//
           reg.reg_EDX=v;
           reg.reg_Flags=0x0001;
           fresult=DeviceIoControl(hDevice,VWIN32_DIOC_DOS_INT13,?,sizeof(reg),?,sizeof(reg),&cb1,0);
           if(!fresult||(reg.reg_Flags & 0x0001))
              ShowMessage("Fail2");
           Edit2->Text=AnsiString(boot[StrToInt(Edit1->Text)]);
           reg.reg_EAX=0x440d;
           reg.reg_EBX=v;
           reg.reg_ECX=0x086b;
           reg.reg_Flags=0x0001;
           DeviceIoControl(hDevice,VWIN32_DIOC_DOS_IOCTL,?,sizeof(reg),?,sizeof(reg),&cb1,0);
           if(!fresult||(reg.reg_Flags & 0x0001))
              ShowMessage("Fail3");
        }}

Answer 2

Win95和DOS不一样，不支持对硬盘BIOS函数的调用，不能从保护模式到V86模式BIOS硬盘请求的转化。调用ROM BIOS会变成使用了一个无效的地址。