Index: traphdlr.c
===================================================================
--- ntoskrnl/ke/i386/traphdlr.c	(revision 74264)
+++ ntoskrnl/ke/i386/traphdlr.c	(working copy)
@@ -220,7 +220,21 @@
                IN ULONG Parameter3)
 {
     /* Check for VDM trap */
-    ASSERT((KiVdmTrap(TrapFrame)) == FALSE);
+    if (KiVdmTrap(TrapFrame))
+    {
+        const UCHAR *eip = (PVOID)((TrapFrame->SegCs << 4) + TrapFrame->Eip);
+        DPRINT1("Thread: %x\n", KeGetCurrentThread());
+        DPRINT1("EFlags: %x\n", TrapFrame->EFlags);
+        DPRINT1("SegCs: %x\n", TrapFrame->SegCs);
+        DPRINT1("Eip: %x\n", TrapFrame->Eip);
+        DPRINT1("ErrCode: %x\n", TrapFrame->ErrCode);
+        DPRINT1("VdmObjects: %p\n", PsGetCurrentProcess()->VdmObjects);
+        DPRINT1("Eip bytes: %02x %02x %02x %02x\n", eip[-4], eip[-3], eip[-2], eip[-1]);
+        DPRINT1("Eip bytes: %02x %02x %02x %02x\n", eip[0], eip[1], eip[2], eip[3]);
+        DPRINT1("Eip bytes: %02x %02x %02x %02x\n", eip[4], eip[5], eip[6], eip[7]);
+        DPRINT1("Eip bytes: %02x %02x %02x %02x\n", eip[8], eip[9], eip[10], eip[11]);
+        ASSERT((KiVdmTrap(TrapFrame)) == FALSE);
+    }
 
     /* Enable interrupts if the trap came from user-mode */
     if (KiUserTrap(TrapFrame)) _enable();
Index: v86vdm.c
===================================================================
--- ntoskrnl/ke/i386/v86vdm.c	(revision 74264)
+++ ntoskrnl/ke/i386/v86vdm.c	(working copy)
@@ -621,6 +621,8 @@
     PVDM_PROCESS_OBJECTS VdmProcessObjects;
     USHORT OldOffset, OldBase;
 
+    DPRINT1("Ke386CallBios (thread %p) for int 0x%lx, Eax=%lx, Ebx=%lx, Ecx=%lx, Edx=%lx, Ebp=%lx, Edi=%lx, Esi=%lx, Ds=%x, Es=%x\n",
+            Thread, Int, Context->Eax, Context->Ebx, Context->Ecx, Context->Edx, Context->Ebp, Context->Edi, Context->Esi, Context->SegDs, Context->SegEs);
     /* Start with a clean TEB */
     RtlZeroMemory(VdmTeb, sizeof(TEB));