windows 中能用int 13 写软盘吗》？

读写软盘可以直接用VWIN32
但是我想知道如何绝对读写物理盘，那位指教？
多谢！

intel 32 cpu  不是重新定义了int 13吗？还能用他写盘？！windows 是如何执行的呢？

directly use vwin32.vxd
createfile(\"\\\\\\\\.\\\\vwin32\"....)
vwin32_dioc_dos_int13 etc.

to:ycxu
   可以做一个16位dll，在其中使用DPMI,在W32中调用dll16.

谢谢你的回复
我已经用bc31做一个16dll,但是在调用DLL中的函数和进行数据传送时出现问题，
请问应用程序如何调用DLL函数？可否提供相关的信息或资料(信息）?

标准的做法是使用THUNK机制，可参考TASM 5.0的例子（需做
DLL32），使用未公开的函数也可以，可参考《WIN95系统编程奥秘》。

可以写一个VXD，用嵌套执行来使用INT13，
具体参见《System programming for win95>>

如果是读写软盘或是只读硬盘而不写硬盘比较简单：
#include <windows.h>

#define VWIN32_DIOC_DOS_INT25     2
   #define VWIN32_DIOC_DOS_INT26     3
   #define VWIN32_DIOC_DOS_DRIVEINFO 6

   typedef struct _DIOC_REGISTERS {
       DWORD reg_EBX;
       DWORD reg_EDX;
       DWORD reg_ECX;
       DWORD reg_EAX;
       DWORD reg_EDI;
       DWORD reg_ESI;
       DWORD reg_Flags;
   } DIOC_REGISTERS, *PDIOC_REGISTERS;

   #define CARRY_FLAG 1

   #pragma pack(1)
   typedef struct _DISKIO {
      DWORD  dwStartSector;   // starting logical sector number
      WORD   wSectors;        // number of sectors
      DWORD  dwBuffer;        // address of read/write buffer
   } DISKIO, * PDISKIO;
   #pragma pack()

   NewReadSectors(hDev, bDrive, dwStartSector, wSectors, lpSectBuff)

   Purpose:
     Reads the specified number of sectors into a caller-supplied
     buffer. Uses Int 21h function 7305h

   Parameters:
     hDev
        Handle of VWIN32

     bDrive
        The MS-DOS logical drive number. 0 = default, 1 = A, 2 = B,
        3 = C, etc.

     dwStartSector
        The first sector to read.

     wSectors
        The number of sectors to read.

     lpSectBuff
        The caller-supplied buffer to read into.

   Return Value:
     Returns TRUE if successful, or FALSE if failure.

   Comments:
     This function does not validate its parameters.  It assumes that
     lpSectBuff is allocated by the caller and is large enough to
     hold all of the data from all of the sectors being read.
   ------------------------------------------------------------------*/
   BOOL NewReadSectors (HANDLE hDev,
                        BYTE   bDrive,
                        DWORD  dwStartSector,
                        WORD   wSectors,
                        LPBYTE lpSectBuff)
   {
     BOOL           fResult;
     DWORD          cb;
     DIOC_REGISTERS reg = {0};
     DISKIO         dio;

     dio.dwStartSector = dwStartSector;
     dio.wSectors      = wSectors;
     dio.dwBuffer      = (DWORD)lpSectBuff;

     reg.reg_EAX = 0x7305;   // Ext_ABSDiskReadWrite
     reg.reg_EBX = (DWORD)&dio;
     reg.reg_ECX = -1;
     reg.reg_EDX = bDrive;   // Int 21h, fn 7305h drive numbers are 1-based

     fResult = DeviceIoControl(hDev, VWIN32_DIOC_DOS_DRIVEINFO,
                               &reg, sizeof(reg),
                               &reg, sizeof(reg), &cb, 0);

     // Determine if the DeviceIoControl call and the read succeeded.
     fResult = fResult && !(reg.reg_Flags & CARRY_FLAG);

     return fResult;
   }


   /*------------------------------------------------------------------
   NewWriteSectors(hDev, bDrive, dwStartSector, wSectors, lpSectBuff)

   Purpose:
     Writes the specified number of sectors from a caller-supplied
     buffer. Uses Int 21h function 7305h

   Parameters:
     hDev
        Handle of VWIN32

     bDrive
        The MS-DOS logical drive number. 0 = default, 1 = A, 2 = B,
        3 = C, etc.

     dwStartSector
        The first sector to write.

     wSectors
        The number of sectors to write.

     lpSectBuff
        The caller-supplied buffer from which to write.

   Return Value:
     Returns TRUE if successful, or FALSE if failure.

   Comments:
     This function does not validate its parameters.  It assumes that
     lpSectBuff is allocated by the caller and is large enough to
     hold all of the data to be written.
   ------------------------------------------------------------------*/
   BOOL NewWriteSectors (HANDLE hDev,
                        BYTE   bDrive,
                        DWORD  dwStartSector,
                        WORD   wSectors,
                        LPBYTE lpSectBuff)
   {
     BOOL           fResult;
     DWORD          cb;
     DIOC_REGISTERS reg = {0};
     DISKIO         dio;

     dio.dwStartSector = dwStartSector;
     dio.wSectors      = wSectors;
     dio.dwBuffer      = (DWORD)lpSectBuff;

     reg.reg_EAX = 0x7305;   // Ext_ABSDiskReadWrite
     reg.reg_EBX = (DWORD)&dio;
     reg.reg_ECX = -1;
     reg.reg_EDX = bDrive;   // Int 21h, fn 7305h drive numbers are 1-based

     reg.reg_ESI = 0x6001;   // Normal file data (See function
                             // documentation for other values)


     fResult = DeviceIoControl(hDev, VWIN32_DIOC_DOS_DRIVEINFO,
                               &reg, sizeof(reg),
                               &reg, sizeof(reg), &cb, 0);

     // Determine if the DeviceIoControl call and the write succeeded.
     fResult = fResult && !(reg.reg_Flags & CARRY_FLAG);

     return fResult;
   }
//调用如下：
HANDLE hDisk;
hDisk=CreateFile(\"\\\\\\\\.\\\\vwin32\",0,0,NULL,0,
FILE_FLAG_DELETE_ON_CLOSE,NULL);

if(hDisk!=INVALID_HANDLE_VALUE)
{
//printf(\"\\n Read Sector Sector %,StartSectors);
if(!NewReadSectors(hDisk,Driver,StartSectors,
NumSectors,lpBuff))
{
printf(\"Read Failed!\");
CloseHandle(hDisk);
return FALSE;
}
//此代码不能对硬盘写，是因为windows的保护原因。我用来读硬盘的任意扇区没问题，软盘可任意读写。