各位大哥，为什么不行，帮我看看这段代码吧！！！

这是我写的读物理硬盘的驱动。
#define DEVICE_MAIN
#include \"rw.h\"
Declare_Virtual_Device(RW)
#undef DEVICE_MAIN

RwVM::RwVM(VMHANDLE hVM) : VVirtualMachine(hVM) {}

RwThread::RwThread(THREADHANDLE hThread) : VThread(hThread) {}

DWORD RwDevice::OnW32DeviceIoControl(PIOCTLPARAMS lpDIOCParms)
{
DWORD dwRetVal=0,retu;
VMHANDLE hVM;

DAP Dap,*lpDap;
CLIENT_STRUCT saveregs;
PCLIENT_STRUCT pRegs;
DWORD PageNum1,PageNum2;
WORD PageOff;
DWORD Address,lpOutBuf;
DWORD MyPage;
WORD seg,offset;
BYTE *lpOutBuf;



switch(lpDIOCParms->dioc_IOCtlCode)
{
case DIOC_OPEN:
case DIOC_CLOSEHANDLE:
return DEVIOCTL_NOERROR;
case READ:
Save_Client_State(&saveregs);
/*lpOutBuf 指向数据存储缓冲区，相当于int 13中的es:bx.
lpOutBuf=(char *)lpDIOCParms->dioc_OutBuf;
pRegs=lpDIOCParms->dioc_pcrs;

hVM=Get_Cur_VM_Handle();
/*是否这里有问题？ 我我认为要把PM下的线性地址转换为V86下段：偏移的形式 */
PageNum1=(DWORD)lpOutBuf>>12;
PageOff=(DWORD)lpOutBuf&0xfff;
if(!LinMapIntoV86(PageNum1,hVM,0x10,1,0,&MyPage))return 3;
Address=(MyPage<<12)+PageOff;
seg=LOWORD(Address>>4);
offset=LOWORD(Address-(seg<<4));
_clientES=seg;
_clientBX=offset;
_clientAH=0x2;
_clientAL=0x1;
_clientCX=1;
_clientDL=0x80;

Begin_Nest_V86_Exec();
Exec_Int(0x13);

End_Nest_Exec();

Restore_Client_State(&saveregs);
PageNum1=GetNulPageHandle();
if(!MapIntoV86(PageNum1,hVM,0x10,1,0,0))return 3;

break;
case WRITE:
break;
default:
return ERROR_NOT_SUPPORTED;
}
return 0;
}

为了能访问大硬盘，我还写了扩展int 13h的版本，也是死机！！我不明白的地方更多
// RW.cpp - main module for VxD RW

#define DEVICE_MAIN
#include \"rw.h\"
Declare_Virtual_Device(RW)
#undef DEVICE_MAIN

RwVM::RwVM(VMHANDLE hVM) : VVirtualMachine(hVM) {}

RwThread::RwThread(THREADHANDLE hThread) : VThread(hThread) {}

DWORD RwDevice::OnW32DeviceIoControl(PIOCTLPARAMS lpDIOCParms)
{
DWORD dwRetVal=0,retu;
VMHANDLE hVM;

DAP Dap,*lpDap;

CLIENT_STRUCT saveregs;
PCLIENT_STRUCT pRegs;
DWORD PageNum1,PageNum2;
WORD PageOff;
DWORD Address;
DWORD V86PageNum,MyPage;
WORD seg,offset;
BYTE *lpOutBuf;



switch(lpDIOCParms->dioc_IOCtlCode)
{
case DIOC_OPEN:
case DIOC_CLOSEHANDLE:
return DEVIOCTL_NOERROR;
case READ:
Save_Client_State(&saveregs);
lpOutBuf=(char *)lpDIOCParms->dioc_OutBuf;
pRegs=lpDIOCParms->dioc_pcrs;

Dap.PacketSize=((DAP *)(lpDIOCParms->dioc_InBuf))->PacketSize;
Dap.Reserved=((DAP *)(lpDIOCParms->dioc_InBuf))->Reserved;
Dap.AbsoluteBlockNumber[0]=((DAP *)(lpDIOCParms->dioc_InBuf))->AbsoluteBlockNumber[0];
Dap.AbsoluteBlockNumber[1]=((DAP *)(lpDIOCParms->dioc_InBuf))->AbsoluteBlockNumber[1];
Dap.TransferBuffer=lpOutBuf;

hVM=Get_Cur_VM_Handle();

/*转换地址*/
lpDap=&Dap;
PageNum2=((DWORD)lpDap)>>12;
PageOff=((DWORD)lpDap)&0xfff;
if(!LinMapIntoV86(PageNum2,hVM,0x20,1,0,&MyPage))return 3;
Address=(MyPage<<12)+PageOff;
seg=LOWORD(Address>>4);
offset=LOWORD(Address-(seg<<4));



_clientDS=seg;
_clientSI=offset;

_clientAH=0x42;
_clientDL=0x80;

Begin_Nest_V86_Exec();
Exec_Int(0x13);

End_Nest_Exec();

Restore_Client_State(&saveregs);
                           PageNum2=GetNulPageHandle();
                   MapIntoV86PageNum2,hVM,0x20,1,0,0);
break;
case WRITE:
break;
default:
return ERROR_NOT_SUPPORTED;
}
return 0;
}

代码太长了，而且别人也不一定都用过，最明白的其实是你自己哦。

调试跟踪

看是什么地方出的问题

大家再帮你想办法

在扩展INT 13的代码中，每次都是调用中断是，SOFTICE报告一个错误，然后就不能回到应用程序，无法退出SOFTICE