diff --git a/ports/atmel-samd/boards/feather_m4_can/mpconfigboard.mk b/ports/atmel-samd/boards/feather_m4_can/mpconfigboard.mk
index 57c1ac918f963..ce2f5116cf703 100644
--- a/ports/atmel-samd/boards/feather_m4_can/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/feather_m4_can/mpconfigboard.mk
@@ -13,6 +13,7 @@ LONGINT_IMPL = MPZ
 CIRCUITPY__EVE = 1
 CIRCUITPY_BITMAPFILTER = 0
 CIRCUITPY_CANIO = 1
+CIRCUITPY_FLOPPYIO = 0
 CIRCUITPY_SYNTHIO = 0
 CIRCUITPY_GIFIO = 0
 CIRCUITPY_JPEGIO = 0
diff --git a/ports/atmel-samd/boards/feather_m4_express/mpconfigboard.mk b/ports/atmel-samd/boards/feather_m4_express/mpconfigboard.mk
index 16af70ef683f9..9f908c98f1481 100644
--- a/ports/atmel-samd/boards/feather_m4_express/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/feather_m4_express/mpconfigboard.mk
@@ -11,6 +11,7 @@ EXTERNAL_FLASH_DEVICES = "GD25Q16C,W25Q16JVxQ"
 LONGINT_IMPL = MPZ
 
 CIRCUITPY__EVE = 1
+CIRCUITPY_CODEOP = 0
 CIRCUITPY_FLOPPYIO = 0
 CIRCUITPY_JPEGIO = 0
 CIRCUITPY_SYNTHIO = 0
diff --git a/ports/atmel-samd/boards/itsybitsy_m4_express/mpconfigboard.mk b/ports/atmel-samd/boards/itsybitsy_m4_express/mpconfigboard.mk
index 4c11a905baa50..d952a74b510b9 100644
--- a/ports/atmel-samd/boards/itsybitsy_m4_express/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/itsybitsy_m4_express/mpconfigboard.mk
@@ -10,6 +10,7 @@ QSPI_FLASH_FILESYSTEM = 1
 EXTERNAL_FLASH_DEVICES = "GD25Q16C,W25Q16JVxQ"
 LONGINT_IMPL = MPZ
 
+CIRCUITPY_CODEOP = 0
 CIRCUITPY_FLOPPYIO = 0
 CIRCUITPY_GIFIO = 0
 CIRCUITPY_JPEGIO = 0
diff --git a/shared-bindings/i2ctarget/I2CTarget.c b/shared-bindings/i2ctarget/I2CTarget.c
index 2a3749fdb286b..b58ef48832e53 100644
--- a/shared-bindings/i2ctarget/I2CTarget.c
+++ b/shared-bindings/i2ctarget/I2CTarget.c
@@ -49,7 +49,7 @@ static mp_obj_t mp_obj_new_i2ctarget_i2c_target_request(i2ctarget_i2c_target_obj
 //|         :param bool smbus: Use SMBUS timings if the hardware supports it"""
 //|         ...
 static mp_obj_t i2ctarget_i2c_target_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
-    i2ctarget_i2c_target_obj_t *self = mp_obj_malloc(i2ctarget_i2c_target_obj_t, &i2ctarget_i2c_target_type);
+    i2ctarget_i2c_target_obj_t *self = mp_obj_malloc_with_finaliser(i2ctarget_i2c_target_obj_t, &i2ctarget_i2c_target_type);
     enum { ARG_scl, ARG_sda, ARG_addresses, ARG_smbus };
     static const mp_arg_t allowed_args[] = {
         { MP_QSTR_scl, MP_ARG_REQUIRED | MP_ARG_OBJ },
@@ -85,13 +85,18 @@ static mp_obj_t i2ctarget_i2c_target_make_new(const mp_obj_type_t *type, size_t
 //|         """Releases control of the underlying hardware so other classes can use it."""
 //|         ...
 static mp_obj_t i2ctarget_i2c_target_obj_deinit(mp_obj_t self_in) {
-    mp_check_self(mp_obj_is_type(self_in, &i2ctarget_i2c_target_type));
     i2ctarget_i2c_target_obj_t *self = MP_OBJ_TO_PTR(self_in);
     common_hal_i2ctarget_i2c_target_deinit(self);
     return mp_const_none;
 }
 MP_DEFINE_CONST_FUN_OBJ_1(i2ctarget_i2c_target_deinit_obj, i2ctarget_i2c_target_obj_deinit);
 
+static void check_for_deinit(i2ctarget_i2c_target_obj_t *self) {
+    if (common_hal_i2ctarget_i2c_target_deinited(self)) {
+        raise_deinited_error();
+    }
+}
+
 //|     def __enter__(self) -> I2CTarget:
 //|         """No-op used in Context Managers."""
 //|         ...
@@ -102,7 +107,6 @@ MP_DEFINE_CONST_FUN_OBJ_1(i2ctarget_i2c_target_deinit_obj, i2ctarget_i2c_target_
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 static mp_obj_t i2ctarget_i2c_target_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    mp_check_self(mp_obj_is_type(args[0], &i2ctarget_i2c_target_type));
     i2ctarget_i2c_target_obj_t *self = MP_OBJ_TO_PTR(args[0]);
     common_hal_i2ctarget_i2c_target_deinit(self);
     return mp_const_none;
@@ -117,11 +121,9 @@ static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(i2ctarget_i2c_target___exit___obj, 4,
 //|         :rtype: ~i2ctarget.I2CTargetRequest"""
 //|
 static mp_obj_t i2ctarget_i2c_target_request(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
-    mp_check_self(mp_obj_is_type(pos_args[0], &i2ctarget_i2c_target_type));
     i2ctarget_i2c_target_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
-    if (common_hal_i2ctarget_i2c_target_deinited(self)) {
-        raise_deinited_error();
-    }
+    check_for_deinit(self);
+
     enum { ARG_timeout };
     static const mp_arg_t allowed_args[] = {
         { MP_QSTR_timeout,      MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NEW_SMALL_INT(-1)} },
@@ -186,6 +188,7 @@ static MP_DEFINE_CONST_FUN_OBJ_KW(i2ctarget_i2c_target_request_obj, 1, i2ctarget
 
 static const mp_rom_map_elem_t i2ctarget_i2c_target_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&i2ctarget_i2c_target_deinit_obj) },
+    { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&i2ctarget_i2c_target_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
     { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&i2ctarget_i2c_target___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_request), MP_ROM_PTR(&i2ctarget_i2c_target_request_obj) },
@@ -227,8 +230,9 @@ static mp_obj_t i2ctarget_i2c_target_request_make_new(const mp_obj_type_t *type,
 //|         """Close the request."""
 //|         ...
 static mp_obj_t i2ctarget_i2c_target_request_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    mp_check_self(mp_obj_is_type(args[0], &i2ctarget_i2c_target_request_type));
     i2ctarget_i2c_target_request_obj_t *self = MP_OBJ_TO_PTR(args[0]);
+    check_for_deinit(self->target);
+
     common_hal_i2ctarget_i2c_target_close(self->target);
     return mp_const_none;
 }
@@ -237,8 +241,9 @@ static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(i2ctarget_i2c_target_request___exit__
 //|     address: int
 //|     """The I2C address of the request."""
 static mp_obj_t i2ctarget_i2c_target_request_get_address(mp_obj_t self_in) {
-    mp_check_self(mp_obj_is_type(self_in, &i2ctarget_i2c_target_request_type));
     i2ctarget_i2c_target_request_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    check_for_deinit(self->target);
+
     return mp_obj_new_int(self->address);
 }
 MP_DEFINE_CONST_PROP_GET(i2ctarget_i2c_target_request_address_obj, i2ctarget_i2c_target_request_get_address);
@@ -246,8 +251,9 @@ MP_DEFINE_CONST_PROP_GET(i2ctarget_i2c_target_request_address_obj, i2ctarget_i2c
 //|     is_read: bool
 //|     """The I2C main controller is reading from this target."""
 static mp_obj_t i2ctarget_i2c_target_request_get_is_read(mp_obj_t self_in) {
-    mp_check_self(mp_obj_is_type(self_in, &i2ctarget_i2c_target_request_type));
     i2ctarget_i2c_target_request_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    check_for_deinit(self->target);
+
     return mp_obj_new_bool(self->is_read);
 }
 MP_DEFINE_CONST_PROP_GET(i2ctarget_i2c_target_request_is_read_obj, i2ctarget_i2c_target_request_get_is_read);
@@ -255,8 +261,9 @@ MP_DEFINE_CONST_PROP_GET(i2ctarget_i2c_target_request_is_read_obj, i2ctarget_i2c
 //|     is_restart: bool
 //|     """Is Repeated Start Condition."""
 static mp_obj_t i2ctarget_i2c_target_request_get_is_restart(mp_obj_t self_in) {
-    mp_check_self(mp_obj_is_type(self_in, &i2ctarget_i2c_target_request_type));
     i2ctarget_i2c_target_request_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    check_for_deinit(self->target);
+
     return mp_obj_new_bool(self->is_restart);
 }
 MP_DEFINE_CONST_PROP_GET(i2ctarget_i2c_target_request_is_restart_obj, i2ctarget_i2c_target_request_get_is_restart);
@@ -270,8 +277,9 @@ MP_DEFINE_CONST_PROP_GET(i2ctarget_i2c_target_request_is_restart_obj, i2ctarget_
 //|         :return: Bytes read"""
 //|         ...
 static mp_obj_t i2ctarget_i2c_target_request_read(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
-    mp_check_self(mp_obj_is_type(pos_args[0], &i2ctarget_i2c_target_request_type));
     i2ctarget_i2c_target_request_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
+    check_for_deinit(self->target);
+
     enum { ARG_n, ARG_ack };
     static const mp_arg_t allowed_args[] = {
         { MP_QSTR_n,          MP_ARG_INT, {.u_int = -1} },
@@ -327,8 +335,8 @@ MP_DEFINE_CONST_FUN_OBJ_KW(i2ctarget_i2c_target_request_read_obj, 1, i2ctarget_i
 //|         :return: Number of bytes written"""
 //|         ...
 static mp_obj_t i2ctarget_i2c_target_request_write(mp_obj_t self_in, mp_obj_t buf_in) {
-    mp_check_self(mp_obj_is_type(self_in, &i2ctarget_i2c_target_request_type));
     i2ctarget_i2c_target_request_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    check_for_deinit(self->target);
 
     if (!self->is_read) {
         mp_raise_OSError(MP_EACCES);
@@ -361,8 +369,9 @@ static MP_DEFINE_CONST_FUN_OBJ_2(i2ctarget_i2c_target_request_write_obj, i2ctarg
 //|         ...
 //|
 static mp_obj_t i2ctarget_i2c_target_request_ack(uint n_args, const mp_obj_t *args) {
-    mp_check_self(mp_obj_is_type(args[0], &i2ctarget_i2c_target_request_type));
     i2ctarget_i2c_target_request_obj_t *self = MP_OBJ_TO_PTR(args[0]);
+    check_for_deinit(self->target);
+
     bool ack = (n_args == 1) ? true : mp_obj_is_true(args[1]);
 
     if (self->is_read) {
@@ -375,8 +384,8 @@ static mp_obj_t i2ctarget_i2c_target_request_ack(uint n_args, const mp_obj_t *ar
 MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(i2ctarget_i2c_target_request_ack_obj, 1, 2, i2ctarget_i2c_target_request_ack);
 
 static mp_obj_t i2ctarget_i2c_target_request_close(mp_obj_t self_in) {
-    mp_check_self(mp_obj_is_type(self_in, &i2ctarget_i2c_target_request_type));
     i2ctarget_i2c_target_request_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    check_for_deinit(self->target);
 
     common_hal_i2ctarget_i2c_target_close(self->target);
     return mp_const_none;