diff --git a/CMakeLists.txt b/CMakeLists.txt
index 64bf6a9f9..56bc4b1f6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -193,7 +193,7 @@ project (Jerry CXX C ASM)
        JERRY_BRANCH_NAME="${JERRY_GIT_BRANCH}")
 
   # Debug
-   set(DEFINES_JERRY_DEBUG )
+   set(DEFINES_JERRY_DEBUG JERRY_ENABLE_PRETTY_PRINTER)
 
   # Release
    set(DEFINES_JERRY_RELEASE JERRY_NDEBUG)
@@ -234,7 +234,8 @@ project (Jerry CXX C ASM)
   # Linux
    set(DEFINES_JERRY_LINUX __TARGET_HOST JERRY_SOURCE_BUFFER_SIZE=1048576)
   # MCU
-   set(DEFINES_JERRY_MCU __TARGET_MCU)
+   math(EXPR MEM_HEAP_AREA_SIZE_16K "16 * 1024")
+   set(DEFINES_JERRY_MCU CONFIG_MEM_HEAP_AREA_SIZE=${MEM_HEAP_AREA_SIZE_16K} __TARGET_MCU)
    # stm32f3
     set(DEFINES_JERRY_MCU_STM32F3 __TARGET_MCU_STM32F3)
    # stm32f4
@@ -310,6 +311,7 @@ project (Jerry CXX C ASM)
   file(GLOB SOURCE_PLUGINS_LIB_DEVICE_STM plugins/lib-device-stm/*.cpp)
 
   set(SOURCE_CORE
+      src/jerry.cpp
       ${SOURCE_CORE_MEM}
       ${SOURCE_CORE_VM}
       ${SOURCE_CORE_ECMA_BUILTINS}
@@ -320,13 +322,16 @@ project (Jerry CXX C ASM)
       ${SOURCE_CORE_JRT}
       ${SOURCE_PLUGINS_LIB_DEVICE_STM})
   
- # Jerry standalone
-  set(SOURCE_JERRY_STANDALONE_MAIN src/main.cpp)
-
  # Platform-specific
   # Linux
+   # Jerry standalone
+    set(SOURCE_JERRY_STANDALONE_MAIN_LINUX src/main_linux.cpp)
+
    file(GLOB SOURCE_CORE_JRT_LINUX src/jrt/target/linux/*.cpp src/jrt/target/linux/*.S)
   # MCU
+   # Jerry standalone
+    set(SOURCE_JERRY_STANDALONE_MAIN_MCU src/main_mcu.cpp)
+
    # stm32f3
     file(GLOB SOURCE_CORE_JRT_STM32F3 src/jrt/target/stm32f3/*.cpp src/jrt/target/stm32f3/*.S)
    # stm32f4
@@ -410,7 +415,7 @@ project (Jerry CXX C ASM)
     target_compile_definitions(${TARGET_NAME}.lib PRIVATE ${DEFINES_JERRY})
     target_include_directories(${TARGET_NAME}.lib PRIVATE ${INCLUDE_CORE})
 
-    add_executable(${TARGET_NAME} ${SOURCE_JERRY_STANDALONE_MAIN})
+    add_executable(${TARGET_NAME} ${SOURCE_JERRY_STANDALONE_MAIN_LINUX})
     target_compile_options(${TARGET_NAME} PRIVATE ${CXX_FLAGS_JERRY} ${CXX_FLAGS_COMMON_ARCH} ${CXX_FLAGS_COMMON_${BUILD_MODE}})
     set_property(TARGET ${TARGET_NAME} PROPERTY LINK_FLAGS "${LINKER_FLAGS_JERRY} ${LINKER_FLAGS_STATIC}")
     target_compile_definitions(${TARGET_NAME} PRIVATE ${DEFINES_JERRY})
@@ -517,7 +522,7 @@ project (Jerry CXX C ASM)
       target_include_directories(${TARGET_NAME}.third_party.lib PRIVATE
                                  ${INCLUDE_THIRD_PARTY_MCU_${PLATFORM}})
 
-     add_executable(${TARGET_NAME} ${SOURCE_JERRY_STANDALONE_MAIN})
+     add_executable(${TARGET_NAME} ${SOURCE_JERRY_STANDALONE_MAIN_MCU})
      target_compile_options(${TARGET_NAME} PRIVATE
                             ${CXX_FLAGS_JERRY}
                             ${CXX_FLAGS_COMMON_${BUILD_MODE}}
diff --git a/src/config.h b/src/config.h
index 29952cc8a..8327368d9 100644
--- a/src/config.h
+++ b/src/config.h
@@ -51,13 +51,9 @@
 /**
  * Size of heap
  */
-#ifdef __TARGET_HOST
+#ifndef CONFIG_MEM_HEAP_AREA_SIZE
 # define CONFIG_MEM_HEAP_AREA_SIZE (64 * 1024)
-#elif defined (__TARGET_MCU)
-# define CONFIG_MEM_HEAP_AREA_SIZE (16 * 1024)
-#else /* !__TARGET_HOST && !__TARGET_MCU */
-# error "!__TARGET_HOST && !__TARGET_MCU"
-#endif /* !__TARGET_HOST && !__TARGET_MCU */
+#endif /* !CONFIG_MEM_HEAP_AREA_SIZE */
 
 /**
  * Log2 of maximum possible offset in the heap
diff --git a/src/jerry.cpp b/src/jerry.cpp
new file mode 100644
index 000000000..8d4697b37
--- /dev/null
+++ b/src/jerry.cpp
@@ -0,0 +1,55 @@
+/* Copyright 2015 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "deserializer.h"
+#include "jerry.h"
+#include "jrt.h"
+#include "parser.h"
+#include "serializer.h"
+#include "vm.h"
+
+bool
+jerry_run (const char *script_source, size_t script_source_size,
+           bool is_parse_only, bool is_show_opcodes, bool is_show_mem_stats)
+{
+  const opcode_t *opcodes;
+
+  mem_init ();
+  deserializer_init ();
+
+  parser_init (script_source, script_source_size, is_show_opcodes);
+  parser_parse_program ();
+
+  opcodes = (const opcode_t*) deserialize_bytecode ();
+
+  serializer_print_opcodes ();
+  parser_free ();
+
+  if (is_parse_only)
+  {
+    deserializer_free ();
+    mem_finalize (is_show_mem_stats);
+    return true;
+  }
+
+  init_int (opcodes, is_show_mem_stats);
+
+  bool is_success = run_int ();
+
+  deserializer_free ();
+  mem_finalize (is_show_mem_stats);
+
+  return is_success;
+} /* jerry_run */
diff --git a/src/jerry.h b/src/jerry.h
new file mode 100644
index 000000000..da560eee0
--- /dev/null
+++ b/src/jerry.h
@@ -0,0 +1,36 @@
+/* Copyright 2015 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef JERRY_H
+#define JERRY_H
+
+#include "jrt_types.h"
+
+/** \addtogroup jerry Jerry engine interface
+ * @{
+ */
+
+extern bool
+jerry_run (const char *script_source,
+           size_t script_source_size,
+           bool is_parse_only,
+           bool is_show_opcodes,
+           bool is_show_mem_stats);
+
+/**
+ * @}
+ */
+
+#endif /* !JERRY_H */
diff --git a/src/jrt/jrt.h b/src/jrt/jrt.h
index 47b689360..4b315b6ee 100644
--- a/src/jrt/jrt.h
+++ b/src/jrt/jrt.h
@@ -16,16 +16,7 @@
 #ifndef JERRY_GLOBALS_H
 #define JERRY_GLOBALS_H
 
-#include <float.h>
-#include <stdint.h>
-#include <stdbool.h>
-#include <stddef.h>
-#include <sys/types.h>
-
-/**
- * Types
- */
-typedef unsigned long mword_t;
+#include "jrt_types.h"
 
 /**
  * Attributes
@@ -213,11 +204,4 @@ extern void __noreturn jerry_exit (jerry_status_t code);
 #define JERRY_MIN(v1, v2) ((v1 < v2) ? v1 : v2)
 #define JERRY_MAX(v1, v2) ((v1 < v2) ? v2 : v1)
 
-/**
- * Enable --show-opcodes key.
- */
-#if defined (__TARGET_HOST) && !defined (JERRY_NDEBUG)
-# define JERRY_ENABLE_PP
-#endif
-
 #endif /* !JERRY_GLOBALS_H */
diff --git a/src/jrt/jrt_types.h b/src/jrt/jrt_types.h
new file mode 100644
index 000000000..9b612cd4f
--- /dev/null
+++ b/src/jrt/jrt_types.h
@@ -0,0 +1,25 @@
+/* Copyright 2015 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef JRT_TYPES_H
+#define JRT_TYPES_H
+
+#include <float.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <sys/types.h>
+
+#endif /* !JRT_TYPES_H */
diff --git a/src/main.cpp b/src/main_linux.cpp
similarity index 63%
rename from src/main.cpp
rename to src/main_linux.cpp
index e544f5113..371fb3f68 100644
--- a/src/main.cpp
+++ b/src/main_linux.cpp
@@ -13,64 +13,10 @@
  * limitations under the License.
  */
 
-#ifdef __TARGET_MCU
-#include "common-io.h"
-#include "actuators.h"
-#include "sensors.h"
-
-#include JERRY_MCU_SCRIPT_HEADER
-static const char generated_source [] = JERRY_MCU_SCRIPT;
-
-#endif
-
-#include "jrt.h"
-#include "vm.h"
+#include "config.h"
+#include "jerry.h"
 #include "jerry-libc.h"
-#include "lexer.h"
-#include "parser.h"
-#include "serializer.h"
-#include "deserializer.h"
 
-#define MAX_STRINGS 100
-#define MAX_NUMS 25
-
-static bool
-jerry_run (const char *script_source, size_t script_source_size,
-           bool is_parse_only, bool is_show_opcodes, bool is_show_mem_stats)
-{
-  const opcode_t *opcodes;
-
-  mem_init ();
-  deserializer_init ();
-
-  parser_init (script_source, script_source_size, is_show_opcodes);
-  parser_parse_program ();
-
-  opcodes = (const opcode_t*) deserialize_bytecode ();
-
-#ifdef __TARGET_HOST
-  serializer_print_opcodes ();
-#endif /* __TARGET_HOST */
-  parser_free ();
-
-  if (is_parse_only)
-  {
-    deserializer_free ();
-    mem_finalize (is_show_mem_stats);
-    return true;
-  }
-
-  init_int (opcodes, is_show_mem_stats);
-
-  bool is_success = run_int ();
-
-  deserializer_free ();
-  mem_finalize (is_show_mem_stats);
-
-  return is_success;
-} /* jerry_run */
-
-#ifdef __TARGET_HOST
 static uint8_t source_buffer[ JERRY_SOURCE_BUFFER_SIZE ];
 
 static const char*
@@ -149,7 +95,7 @@ main (int argc __unused,
   int i;
   size_t files_counter = 0;
 
-  jrt_set_mem_limits (MEM_HEAP_AREA_SIZE + CONFIG_MEM_DATA_LIMIT_MINUS_HEAP_SIZE,
+  jrt_set_mem_limits (CONFIG_MEM_HEAP_AREA_SIZE + CONFIG_MEM_DATA_LIMIT_MINUS_HEAP_SIZE,
                       CONFIG_MEM_STACK_LIMIT);
 
   for (i = 1; i < argc; i++)
@@ -177,12 +123,7 @@ main (int argc __unused,
     }
     else if (!__strcmp ("--show-opcodes", argv[i]))
     {
-#ifdef JERRY_ENABLE_PP
       show_opcodes = true;
-#else /* !JERRY_ENABLE_PP */
-      __printf ("Ignoring --show-opcodes since target is not x86_64 or debug is not enabled.\n");
-      show_opcodes = false;
-#endif /* JERRY_ENABLE_PP */
     }
     else
     {
@@ -202,28 +143,3 @@ main (int argc __unused,
 
   jerry_exit (is_success ? ERR_OK : ERR_FAILED_ASSERTION_IN_SCRIPT);
 }
-#endif /* __TARGET_HOST */
-
-#ifdef __TARGET_MCU
-static uint32_t start __unused;
-static uint32_t finish_native_ms __unused;
-static uint32_t finish_parse_ms __unused;
-static uint32_t finish_int_ms __unused;
-
-int
-main (void)
-{
-  initialize_sys_tick ();
-  initialize_leds ();
-  initialize_timer ();
-
-  const char *source_p = generated_source;
-  const size_t source_size = sizeof (generated_source);
-
-  set_sys_tick_counter ((uint32_t) - 1);
-  start = get_sys_tick_counter ();
-  jerry_run (source_p,
-             source_size, false, false, false);
-  finish_parse_ms = (start - get_sys_tick_counter ()) / 1000;
-}
-#endif /* __TARGET_MCU */
diff --git a/src/main_mcu.cpp b/src/main_mcu.cpp
new file mode 100644
index 000000000..0b5c08854
--- /dev/null
+++ b/src/main_mcu.cpp
@@ -0,0 +1,45 @@
+/* Copyright 2015 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "jerry.h"
+
+#include "common-io.h"
+#include "actuators.h"
+#include "sensors.h"
+
+#include JERRY_MCU_SCRIPT_HEADER
+static const char generated_source [] = JERRY_MCU_SCRIPT;
+
+static uint32_t start __unused;
+static uint32_t finish_native_ms __unused;
+static uint32_t finish_parse_ms __unused;
+static uint32_t finish_int_ms __unused;
+
+int
+main (void)
+{
+  initialize_sys_tick ();
+  initialize_leds ();
+  initialize_timer ();
+
+  const char *source_p = generated_source;
+  const size_t source_size = sizeof (generated_source);
+
+  set_sys_tick_counter ((uint32_t) - 1);
+  start = get_sys_tick_counter ();
+  jerry_run (source_p,
+             source_size, false, false, false);
+  finish_parse_ms = (start - get_sys_tick_counter ()) / 1000;
+}
diff --git a/src/parser/js/serializer.cpp b/src/parser/js/serializer.cpp
index dae306faf..088c3728f 100644
--- a/src/parser/js/serializer.cpp
+++ b/src/parser/js/serializer.cpp
@@ -45,7 +45,7 @@ serializer_merge_scopes_into_bytecode (void)
 void
 serializer_dump_literals (const literal literals[], literal_index_t literals_count)
 {
-#ifdef JERRY_ENABLE_PP
+#ifdef JERRY_ENABLE_PRETTY_PRINTER
   if (print_opcodes)
   {
     pp_literals (literals, literals_count);
@@ -63,7 +63,7 @@ serializer_dump_op_meta (op_meta op)
 
   scopes_tree_add_op_meta (current_scope, op);
 
-#ifdef JERRY_ENABLE_PP
+#ifdef JERRY_ENABLE_PRETTY_PRINTER
   if (print_opcodes)
   {
     pp_op_meta ((opcode_counter_t) (scopes_tree_opcodes_num (current_scope) - 1), op, false);
@@ -94,7 +94,7 @@ serializer_rewrite_op_meta (const opcode_counter_t loc, op_meta op)
 {
   scopes_tree_set_op_meta (current_scope, loc, op);
 
-#ifdef JERRY_ENABLE_PP
+#ifdef JERRY_ENABLE_PRETTY_PRINTER
   if (print_opcodes)
   {
     pp_op_meta (loc, op, true);
@@ -105,7 +105,7 @@ serializer_rewrite_op_meta (const opcode_counter_t loc, op_meta op)
 void
 serializer_print_opcodes (void)
 {
-#ifdef JERRY_ENABLE_PP
+#ifdef JERRY_ENABLE_PRETTY_PRINTER
   opcode_counter_t loc;
 
   if (!print_opcodes)
diff --git a/src/vm/pretty-printer.cpp b/src/vm/pretty-printer.cpp
index 71ebef395..15bc208e9 100644
--- a/src/vm/pretty-printer.cpp
+++ b/src/vm/pretty-printer.cpp
@@ -14,7 +14,7 @@
  */
 
 #include "jrt.h"
-#ifdef JERRY_ENABLE_PP
+#ifdef JERRY_ENABLE_PRETTY_PRINTER
 #include "pretty-printer.h"
 #include "jerry-libc.h"
 #include "lexer.h"
@@ -650,4 +650,4 @@ pp_op_meta (opcode_counter_t oc, op_meta opm, bool rewrite)
 
   __printf ("\n");
 }
-#endif /* JERRY_ENABLE_PP */
+#endif /* JERRY_ENABLE_PRETTY_PRINTER */
diff --git a/src/vm/pretty-printer.h b/src/vm/pretty-printer.h
index 2002a1bb7..09b27d19e 100644
--- a/src/vm/pretty-printer.h
+++ b/src/vm/pretty-printer.h
@@ -17,7 +17,7 @@
 #define PRETTY_PRINTER
 
 #include "jrt.h"
-#ifdef JERRY_ENABLE_PP
+#ifdef JERRY_ENABLE_PRETTY_PRINTER
 #include "vm.h"
 #include "literal.h"
 #include "scopes-tree.h"
@@ -25,6 +25,6 @@
 void pp_opcode (opcode_counter_t, opcode_t, bool);
 void pp_op_meta (opcode_counter_t, op_meta, bool);
 void pp_literals (const literal *, literal_index_t);
-#endif // JERRY_ENABLE_PP
+#endif // JERRY_ENABLE_PRETTY_PRINTER
 
 #endif // PRETTY_PRINTER