1 files changed, 21 insertions, 1 deletions
diff --git a/libdha/sysdep/pci_win32.c b/libdha/sysdep/pci_win32.c
index 1c88cb13e8..a4a08077eb 100644
--- a/libdha/sysdep/pci_win32.c
+++ b/libdha/sysdep/pci_win32.c
@@ -4,15 +4,35 @@
    Modified for readability by Nick Kurshev
 */
 #include <windows.h>
+#include <ddk/ntddk.h>
+#include "../dhahelperwin/dhahelper.h"
+
+static HANDLE hDriver;
+extern int IsWinNT();
+
+
+
 
-/* Nothing to do for Win9x. For WinNT I have no solution */
 
 static __inline__ int enable_os_io(void)
 {
+    if(IsWinNT()){
+      DWORD dwBytesReturned;
+      hDriver = CreateFile("\\\\.\\DHAHELPER",GENERIC_READ | GENERIC_WRITE,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
+      if(!DeviceIoControl(hDriver, IOCTL_DHAHELPER_ENABLEDIRECTIO, NULL,0, NULL, 0, &dwBytesReturned, NULL)){
+        printf("unable to enable directio please install dhahelper.sys\n");
+        return(1);       
+      }
+    }
     return(0);
 }
 
 static __inline__ int disable_os_io(void)
 {
+    if(IsWinNT()){
+      DWORD dwBytesReturned;
+      DeviceIoControl(hDriver, IOCTL_DHAHELPER_DISABLEDIRECTIO, NULL,0, NULL, 0, &dwBytesReturned, NULL);
+      CloseHandle(hDriver);
+    }
     return(0);
 }