diff --git a/extmod/modtrezorutils/modtrezorutils.c b/extmod/modtrezorutils/modtrezorutils.c
new file mode 100644
index 000000000..017cdca56
--- /dev/null
+++ b/extmod/modtrezorutils/modtrezorutils.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) Pavol Rusnak, SatoshiLabs
+ *
+ * Licensed under Microsoft Reference Source License (Ms-RSL)
+ * see LICENSE.md file for details
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+
+#include "py/nlr.h"
+#include "py/runtime.h"
+#include "py/binary.h"
+#include "py/objstr.h"
+
+#if MICROPY_PY_TREZORUTILS
+
+// class Utils(object):
+typedef struct _mp_obj_Utils_t {
+    mp_obj_base_t base;
+} mp_obj_Utils_t;
+
+// def Utils.__init__(self)
+STATIC mp_obj_t mod_TrezorUtils_Utils_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
+    mp_arg_check_num(n_args, n_kw, 0, 0, false);
+    mp_obj_Utils_t *o = m_new_obj(mp_obj_Utils_t);
+    o->base.type = type;
+    return MP_OBJ_FROM_PTR(o);
+}
+
+// def Utils.memaccess(self, address: int, length: int) -> bytes
+STATIC mp_obj_t mod_TrezorUtils_Utils_memaccess(mp_obj_t self, mp_obj_t address, mp_obj_t length) {
+    uint32_t addr = mp_obj_get_int(address);
+    uint32_t len = mp_obj_get_int(length);
+    mp_obj_str_t *o = m_new_obj(mp_obj_str_t);
+    o->base.type = &mp_type_bytes;
+    o->len = len;
+    o->hash = 0;
+    o->data = (byte *)(uintptr_t)addr;
+    return MP_OBJ_FROM_PTR(o);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_3(mod_TrezorUtils_Utils_memaccess_obj, mod_TrezorUtils_Utils_memaccess);
+
+// Utils stuff
+
+STATIC const mp_rom_map_elem_t mod_TrezorUtils_Utils_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_memaccess), MP_ROM_PTR(&mod_TrezorUtils_Utils_memaccess_obj) },
+};
+STATIC MP_DEFINE_CONST_DICT(mod_TrezorUtils_Utils_locals_dict, mod_TrezorUtils_Utils_locals_dict_table);
+
+STATIC const mp_obj_type_t mod_TrezorUtils_Utils_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_Utils,
+    .make_new = mod_TrezorUtils_Utils_make_new,
+    .locals_dict = (void*)&mod_TrezorUtils_Utils_locals_dict,
+};
+
+// module stuff
+
+STATIC const mp_rom_map_elem_t mp_module_TrezorUtils_globals_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_TrezorUtils) },
+    { MP_ROM_QSTR(MP_QSTR_Utils), MP_ROM_PTR(&mod_TrezorUtils_Utils_type) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(mp_module_TrezorUtils_globals, mp_module_TrezorUtils_globals_table);
+
+const mp_obj_module_t mp_module_TrezorUtils = {
+    .base = { &mp_type_module },
+    .name = MP_QSTR_TrezorUtils,
+    .globals = (mp_obj_dict_t*)&mp_module_TrezorUtils_globals,
+};
+
+#endif // MICROPY_PY_TREZORPROTOBUF
diff --git a/src/trezor/utils.py b/src/trezor/utils.py
index 115087a6c..24409153c 100644
--- a/src/trezor/utils.py
+++ b/src/trezor/utils.py
@@ -1,5 +1,11 @@
 import sys
 import gc
+from TrezorUtils import Utils
+
+_utils = Utils()
+
+def memaccess(address, length):
+    return _utils.memaccess(address, length)
 
 def unimport(func):
     def inner(*args, **kwargs):
diff --git a/vendor/micropython b/vendor/micropython
index 130c6ff92..b2f874742 160000
--- a/vendor/micropython
+++ b/vendor/micropython
@@ -1 +1 @@
-Subproject commit 130c6ff92931b7895616a5c4a230ddbe625d0b94
+Subproject commit b2f874742c4b7f5937c1edaf6c2a9bb18b69ed2d