diff --git a/port/modmachine.c b/port/modmachine.c
index 1dcef45..aaf70ff 100644
--- a/port/modmachine.c
+++ b/port/modmachine.c
@@ -38,7 +38,6 @@
 #include "modmachine.h"
 
 #include <rthw.h>
-#include <board.h>
 
 #define PYB_RESET_SOFT      (0)
 #define PYB_RESET_POWER_ON  (1)
@@ -101,7 +100,8 @@ STATIC mp_obj_t machine_unique_id(void) {
 MP_DEFINE_CONST_FUN_OBJ_0(machine_unique_id_obj, machine_unique_id);
 
 STATIC mp_obj_t machine_reset(void) {
-    NVIC_SystemReset();
+    //TODO
+    MP_RTT_NOT_IMPL_PRINT;
     return mp_const_none;
 }
 MP_DEFINE_CONST_FUN_OBJ_0(machine_reset_obj, machine_reset);
diff --git a/port/modrtthread.c b/port/modrtthread.c
index 0d42293..f237d02 100644
--- a/port/modrtthread.c
+++ b/port/modrtthread.c
@@ -65,7 +65,7 @@ MP_DEFINE_CONST_FUN_OBJ_0(mod_os_sync_obj, os_sync);
 
 STATIC mp_obj_t mp_os_mount(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
     //TODO
-    rt_kprintf("NOT implement, Please add for your board!\n");
+    MP_RTT_NOT_IMPL_PRINT;
     return mp_const_none;
 }
 MP_DEFINE_CONST_FUN_OBJ_KW(mp_os_mount_obj, 2, mp_os_mount);