diff --git a/include/ddk/vddsvc.h b/include/ddk/vddsvc.h
index 72d502987dc..8a77ae44f2f 100644
--- a/include/ddk/vddsvc.h
+++ b/include/ddk/vddsvc.h
@@ -26,6 +26,22 @@
 #include <nt_vdd.h>
 #endif
 
+/*
+ * Interrupts services
+ */
+#define ICA_MASTER  0
+#define ICA_SLAVE   1
+
+VOID
+WINAPI
+call_ica_hw_interrupt(INT  ms,
+                      BYTE line,
+                      INT  count);
+
+#define VDDSimulateInterrupt(ms, line, count)   \
+    call_ica_hw_interrupt((ms), (line), (count)) // Windows specifies a count of 1 ...
+
+
 /*
  * Registers manipulation
  */
diff --git a/subsystems/ntvdm/ntvdm.h b/subsystems/ntvdm/ntvdm.h
index b0e80f03fe7..b4fb49417c4 100644
--- a/subsystems/ntvdm/ntvdm.h
+++ b/subsystems/ntvdm/ntvdm.h
@@ -24,7 +24,7 @@
 #include <winreg.h>
 #include <winuser.h>
 
-#include <nt_vdd.h>
+#include <vddsvc.h>
 
 #include <debug.h>
 
diff --git a/subsystems/ntvdm/ntvdm.spec b/subsystems/ntvdm/ntvdm.spec
index 6df8ee2951c..263e5a37e92 100644
--- a/subsystems/ntvdm/ntvdm.spec
+++ b/subsystems/ntvdm/ntvdm.spec
@@ -175,8 +175,6 @@
 
 
 
-
-
 @ stdcall MGetVdmPointer(long long long)
 @ stdcall Sim32pGetVDMPointer(long long)
 
@@ -184,5 +182,6 @@
 @ stdcall VdmMapFlat(long long long)
 ;@ stdcall VdmUnmapFlat(long long ptr long)  ; Not exported on x86
 
+@ stdcall call_ica_hw_interrupt(long long long)
 @ stdcall VDDInstallIOHook(long long ptr ptr)
 @ stdcall VDDDeInstallIOHook(long long ptr)
diff --git a/subsystems/ntvdm/pic.c b/subsystems/ntvdm/pic.c
index c479dfdc1a2..d9552201a68 100644
--- a/subsystems/ntvdm/pic.c
+++ b/subsystems/ntvdm/pic.c
@@ -3,6 +3,7 @@
  * PROJECT:         ReactOS Virtual DOS Machine
  * FILE:            pic.c
  * PURPOSE:         Programmable Interrupt Controller emulation
+ *                  (Interrupt Controller Adapter (ICA) in Windows terminology)
  * PROGRAMMERS:     Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
  */
 
@@ -200,7 +201,7 @@ VOID PicInterruptRequest(BYTE Number)
     if (Number >= 0 && Number < 8)
     {
         /* Check if any of the higher-priority interrupts are busy */
-        for (i = 0; i <= Number ; i++)
+        for (i = 0; i <= Number; i++)
         {
             if (MasterPic.InServiceRegister & (1 << Number)) return;
         }
@@ -301,4 +302,41 @@ BOOLEAN PicInitialize(VOID)
     return TRUE;
 }
 
+
+
+VOID
+WINAPI
+call_ica_hw_interrupt(INT  ms,
+                      BYTE line,
+                      INT  count)
+{
+    BYTE InterruptNumber = line;
+
+    /* Check for PIC validity */
+    if (ms != ICA_MASTER || ms != ICA_SLAVE) return;
+
+    /*
+     * Adjust the interrupt request number according to the parameters,
+     * by adding an offset == 8 to the interrupt number.
+     * 
+     * Indeed VDDs calling this function usually subtracts 8 so that they give:
+     *
+     *      ms     |  line  | corresponding interrupt number
+     * ------------+--------+--------------------------------
+     *  ICA_MASTER | 0 -- 7 |            0 -- 7
+     *  ICA_SLAVE  | 0 -- 7 |            8 -- 15
+     *
+     * and PicInterruptRequest subtracts again 8 to the interrupt number
+     * if it is greater or equal than 8 (so that it determines which PIC
+     * to use via the interrupt number).
+     */
+    if (ms == ICA_SLAVE) InterruptNumber += 8;
+
+    /* Send the specified number of interrupt requests */
+    while (count-- > 0)
+    {
+        PicInterruptRequest(InterruptNumber);
+    }
+}
+
 /* EOF */
diff --git a/subsystems/ntvdm/pic.h b/subsystems/ntvdm/pic.h
index 2ff7ed7ef13..f24f31c94d3 100644
--- a/subsystems/ntvdm/pic.h
+++ b/subsystems/ntvdm/pic.h
@@ -2,7 +2,8 @@
  * COPYRIGHT:       GPL - See COPYING in the top level directory
  * PROJECT:         ReactOS Virtual DOS Machine
  * FILE:            pic.h
- * PURPOSE:         Programmable Interrupt Controller emulation (header file)
+ * PURPOSE:         Programmable Interrupt Controller emulation
+ *                  (Interrupt Controller Adapter (ICA) in Windows terminology)
  * PROGRAMMERS:     Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
  */