Index: reactos/drivers/storage/floppy/floppy.c
===================================================================
--- reactos/drivers/storage/floppy/floppy.c	(revision 74444)
+++ reactos/drivers/storage/floppy/floppy.c	(working copy)
@@ -832,6 +832,91 @@
     UCHAR i;
     UCHAR j;
 
+/* Start of km VPC Detection Routine */
+    int vpc = 1;   // Initially say we are in a VPC machine
+
+/*  Code idea from: http://phrack.org/issues/59/4.html */
+
+    struct idt_descrip
+        {
+         unsigned short lo_offset,segment_value;
+         unsigned char unknown,flags;
+         unsigned short hi_offset;
+        };
+
+    unsigned long get_idt_value (void)
+        {
+         unsigned char idtr_char[6];
+         unsigned long idt_val;
+         __asm__ volatile ("sidt %0": "=m" (idtr_char));
+         idt_val = *((unsigned long *) &idtr_char[2]);
+         return(idt_val);
+        }
+
+    void * get_vect_from_idt (int n)
+        {
+         struct idt_descrip *idt_desc = &((struct idt_descrip *) get_idt_value()) [n];
+         return ((void *) ((idt_desc->hi_offset << 16 ) + idt_desc->lo_offset));
+        }
+
+    void hook_idt(int n,void *new_vect,unsigned long *old_vect)
+
+        {
+         unsigned long new_ptr=(unsigned long)new_vect;
+         struct idt_descrip *idt_struct=(struct idt_descrip *)get_idt_value();
+         /*save old vector*/
+         if(old_vect) *old_vect=(unsigned long)get_vect_from_idt(n);
+         /*assign new stub*/
+         idt_struct[n].hi_offset = (unsigned short) (new_ptr >> 0x10);
+         idt_struct[n].lo_offset = (unsigned short) (new_ptr & 0xFFFF);
+         return;
+        }
+
+/*
+  End of code from: http://phrack.org/issues/59/4.html
+*/
+
+    void unhook_stub(int n, unsigned long old_vect)
+    {
+     unsigned long new_ptr=(unsigned long)old_vect;
+     struct idt_descrip *idt_struct=(struct idt_descrip *)get_idt_value();
+     /*assign original stub back*/
+     idt_struct[n].hi_offset = (unsigned short) (new_ptr >> 16);
+     idt_struct[n].lo_offset = (unsigned short) (new_ptr & 0x0000FFFF);
+     return;
+    }
+
+    unsigned long old_vect;     // used by hook routine to store the original vector value
+
+    void stub_new(void)
+    {
+     __asm__(                   // decrement vpc from 1 to 0 which means we are NOT in VPC
+     "sub $1, %0"
+     : "=r" (vpc)
+     : "r" (vpc)
+     );
+     __asm__ __volatile__ ("addl $4,0x4(%esp)");    // adjust return value on stack to skip 4 bytes of invalid opcode
+     __asm__ __volatile__ ("POP %ebp");             // reset the stack point back to original
+     __asm__ __volatile__ ("IRET");                 // IRET to continue because we are here on INT6
+    }
+
+    hook_idt(6, &stub_new, &old_vect); // Replace INT6 with our new stub
+
+    /* execute 4 byte normally invalid opcode but good on VPC */
+    __asm__ __volatile__ (".byte 0x0F");
+    __asm__ __volatile__ (".byte 0x3F");
+    __asm__ __volatile__ (".byte 0x07");
+    __asm__ __volatile__ (".byte 0x0B");
+
+    unhook_stub(6, old_vect);
+
+/* End of km VPC Detection Routine */
+
+   if (vpc)
+        DPRINT1("FLOPPY.C: Is VPC\n");
+   else
+       DPRINT1("FLOPPY.C: Not VPC\n");
+
     PAGED_CODE();
 
     /* Find our controllers on all ISA buses */
@@ -990,7 +1075,12 @@
 
             /* 3l: Attempt to get drive info - if a floppy is already present */
             StartMotor(&gControllerInfo[i].DriveInfo[j]);
-            RWDetermineMediaType(&gControllerInfo[i].DriveInfo[j], TRUE);
+
+            if (!vpc)
+              RWDetermineMediaType(&gControllerInfo[i].DriveInfo[j], TRUE);
+            else
+              DPRINT1("RWDetermineMediaType was skipped here since we are running VPC!\n");
+
             StopMotor(gControllerInfo[i].DriveInfo[j].ControllerInfo);
         }
     }