diff --git a/libraries/AP_HAL_AVR_SITL/AP_HAL_AVR_SITL.h b/libraries/AP_HAL_AVR_SITL/AP_HAL_AVR_SITL.h
new file mode 100644
index 0000000000..26192824a3
--- /dev/null
+++ b/libraries/AP_HAL_AVR_SITL/AP_HAL_AVR_SITL.h
@@ -0,0 +1,9 @@
+
+#ifndef __AP_HAL_AVR_SITL_H__
+#define __AP_HAL_AVR_SITL_H__
+
+#include "AP_HAL_AVR_SITL_Namespace.h"
+#include "HAL_AVR_SITL_Class.h"
+
+#endif // __AP_HAL_AVR_SITL_H__
+
diff --git a/libraries/AP_HAL_AVR_SITL/AP_HAL_AVR_SITL_Namespace.h b/libraries/AP_HAL_AVR_SITL/AP_HAL_AVR_SITL_Namespace.h
new file mode 100644
index 0000000000..cf7c52620b
--- /dev/null
+++ b/libraries/AP_HAL_AVR_SITL/AP_HAL_AVR_SITL_Namespace.h
@@ -0,0 +1,9 @@
+
+#ifndef __AP_HAL_AVR_SITL_NAMESPACE_H__
+#define __AP_HAL_AVR_SITL_NAMESPACE_H__
+
+namespace AP_HAL_AVR_SITL {
+    class SITLUARTDriver;
+}
+
+#endif // __AP_HAL_AVR_SITL_NAMESPACE_H__
diff --git a/libraries/AP_HAL_AVR_SITL/HAL_AVR_SITL_Class.cpp b/libraries/AP_HAL_AVR_SITL/HAL_AVR_SITL_Class.cpp
new file mode 100644
index 0000000000..27e65e6536
--- /dev/null
+++ b/libraries/AP_HAL_AVR_SITL/HAL_AVR_SITL_Class.cpp
@@ -0,0 +1,49 @@
+
+#include <AP_HAL.h>
+
+#if CONFIG_HAL_BOARD == HAL_BOARD_AVR_SITL
+
+#include <AP_HAL_AVR.h>
+#include <AP_HAL_AVR_private.h>
+#include <AP_HAL_AVR_SITL.h>
+#include "AP_HAL_AVR_SITL_Namespace.h"
+#include "HAL_AVR_SITL_Class.h"
+
+// XXX placeholder
+uint8_t isrRegistry;
+
+static AVRScheduler avrScheduler;
+
+HAL_AVR_SITL::HAL_AVR_SITL() :
+    AP_HAL::HAL(
+        NULL, /* uartA */
+        NULL, /* uartB */
+        NULL, /* uartC */
+        NULL, /* i2c */
+        NULL, /* spi */
+        NULL, /* analogin */
+        NULL, /* storage */
+        NULL, /* console */
+        NULL, /* gpio */
+        NULL, /* rcinput */
+        NULL, /* rcoutput */
+        &avrScheduler) /* scheduler */
+{}
+
+void HAL_AVR_SITL::init(void* machtnichts) const {
+
+    scheduler->init((void*)&isrRegistry);
+    uartA->begin(115200);
+    console->init((void*) uartA);
+
+    rcin->init((void*)&isrRegistry);
+    rcout->init(NULL);
+    spi->init(NULL);
+    i2c->begin();
+    i2c->setTimeout(100);
+    analogin->init(NULL);
+}
+
+const HAL_AVR_SITL AP_HAL_AVR_SITL;
+
+#endif // CONFIG_HAL_BOARD == HAL_BOARD_AVR_SITL
diff --git a/libraries/AP_HAL_AVR_SITL/HAL_AVR_SITL_Class.h b/libraries/AP_HAL_AVR_SITL/HAL_AVR_SITL_Class.h
new file mode 100644
index 0000000000..9d6409fef5
--- /dev/null
+++ b/libraries/AP_HAL_AVR_SITL/HAL_AVR_SITL_Class.h
@@ -0,0 +1,18 @@
+
+#ifndef __AP_HAL_AVR_SITL_CLASS_H__
+#define __AP_HAL_AVR_SITL_CLASS_H__
+
+#include <AP_HAL.h>
+
+#if CONFIG_HAL_BOARD == HAL_BOARD_AVR_SITL
+
+class HAL_AVR_SITL :: public AP_HAL::HAL {
+    HAL_AVR_SITL();    
+    void init(void*) const;
+};
+
+extern const HAL_AVR_SITL AP_HAL_AVR_SITL;
+
+#endif // CONFIG_HAL_BOARD == HAL_BOARD_AVR_SITL
+#endif // __AP_HAL_AVR_SITL_CLASS_H__
+