diff --git a/lib_xua/src/core/user/user_hid.h b/lib_xua/src/core/user/user_hid.h
index 9c135744..edf4ebda 100644
--- a/lib_xua/src/core/user/user_hid.h
+++ b/lib_xua/src/core/user/user_hid.h
@@ -11,5 +11,34 @@
 
 #define HID_DATA_SIZE 1
 
+#ifndef HID_SIMULATE_INTERRUPTS
+#define HID_SIMULATE_INTERRUPTS 0
+#endif
+
+#ifndef HID_SIMULATE_NDP10X
+#define HID_SIMULATE_NDP10X 0
+#endif
+
+#ifndef NDP_ASSERT_HIGH
+#define NDP_ASSERT_HIGH 0
+#endif
+
+#if( 0 < HID_CONTROLS )
+
+#if( 0 < NDP_ASSERT_HIGH )
+#define NDP100_ASSERT_LEVEL   1
+#define NDP100_DEASSERT_LEVEL 0
+#else
+#define NDP100_ASSERT_LEVEL   0
+#define NDP100_DEASSERT_LEVEL 1
+#endif
+
+#if(( 0 < HID_SIMULATE_INTERRUPTS ) || ( 0 < HID_SIMULATE_NDP10X ))
+#define HID_DEASSERT_COUNT    10000000
+#define HID_INTERRUPT_COUNT 1000000000
+#endif
+
+#endif /* ( 0 < HID_CONTROLS ) */
+
 void UserReadHIDData(in port p_int, unsigned char hidData[HID_DATA_SIZE]);
 
diff --git a/lib_xua/src/core/user/user_hid.xc b/lib_xua/src/core/user/user_hid.xc
index 1306a892..79d4cb76 100644
--- a/lib_xua/src/core/user/user_hid.xc
+++ b/lib_xua/src/core/user/user_hid.xc
@@ -4,8 +4,9 @@
 #include <xs1.h>
 #include "user_hid.h"
 
-#define HID_DEASSERT_COUNT    10000000
-#define HID_INTERRUPT_COUNT 1000000000
+#if( 0 < HID_CONTROLS )
+#if( 0 < HID_SIMULATE_NDP10X )
+
 #define HID_REPORT_DATA 0x01
 
 static unsigned char initialised = 0;
@@ -42,3 +43,22 @@ void UserReadHIDData( in port p_int, unsigned char hidData[ HID_DATA_SIZE ])
     last_time = curr_time;
   }
 }
+#else  /* ( 0 < HID_SIMULATE_NDP10X ) */
+
+#define HID_REPORT_INTERRUPT_ASSERTED   0x01
+#define HID_REPORT_INTERRUPT_DEASSERTED 0x00
+
+void UserReadHIDData( in port p_int, unsigned char hidData[ HID_DATA_SIZE ])
+{
+  unsigned curr_val;
+
+  p_int :> curr_val;
+  hidData[ 0 ] = ( curr_val == NDP100_ASSERT_LEVEL ) ? HID_REPORT_INTERRUPT_ASSERTED : HID_REPORT_INTERRUPT_DEASSERTED;
+
+  for( unsigned idx = 1; idx < HID_DATA_SIZE; ++idx ) {
+    hidData[ idx ] = 0U;
+  }
+}
+
+#endif /* ( 0 < HID_SIMULATE_NDP10X ) */
+#endif /* ( 0 < HID_CONTROLS ) */