diff --git a/locale/ID.po b/locale/ID.po
index 8460f78766..2e01bfe9a7 100644
--- a/locale/ID.po
+++ b/locale/ID.po
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-04-04 13:37-0700\n"
+"POT-Creation-Date: 2019-04-08 16:48-0700\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -924,17 +924,9 @@ msgstr "Tidak ada pin TX"
 msgid "No available clocks"
 msgstr ""
 
-#: supervisor/shared/board_busses.c
-msgid "No default I2C bus"
-msgstr "Tidak ada standar bus I2C"
-
-#: supervisor/shared/board_busses.c
-msgid "No default SPI bus"
-msgstr "Tidak ada standar bus SPI"
-
-#: supervisor/shared/board_busses.c
-msgid "No default UART bus"
-msgstr "Tidak ada standar bus UART"
+#: shared-bindings/board/__init__.c
+msgid "No default %q bus"
+msgstr "Tidak ada standar bus %q"
 
 #: ports/atmel-samd/common-hal/touchio/TouchIn.c
 msgid "No free GCLKs"
diff --git a/locale/circuitpython.pot b/locale/circuitpython.pot
index 8516b5e5db..e38aa77279 100644
--- a/locale/circuitpython.pot
+++ b/locale/circuitpython.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-04-04 13:37-0700\n"
+"POT-Creation-Date: 2019-04-08 16:48-0700\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -899,16 +899,8 @@ msgstr ""
 msgid "No available clocks"
 msgstr ""
 
-#: supervisor/shared/board_busses.c
-msgid "No default I2C bus"
-msgstr ""
-
-#: supervisor/shared/board_busses.c
-msgid "No default SPI bus"
-msgstr ""
-
-#: supervisor/shared/board_busses.c
-msgid "No default UART bus"
+#: shared-bindings/board/__init__.c
+msgid "No default %q bus"
 msgstr ""
 
 #: ports/atmel-samd/common-hal/touchio/TouchIn.c
diff --git a/locale/de_DE.po b/locale/de_DE.po
index acfc8ad4db..ae76bc76c8 100644
--- a/locale/de_DE.po
+++ b/locale/de_DE.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-04-04 13:37-0700\n"
+"POT-Creation-Date: 2019-04-08 16:48-0700\n"
 "PO-Revision-Date: 2018-07-27 11:55-0700\n"
 "Last-Translator: Pascal Deneaux\n"
 "Language-Team: Sebastian Plamauer, Pascal Deneaux\n"
@@ -912,17 +912,9 @@ msgstr "Kein TX Pin"
 msgid "No available clocks"
 msgstr ""
 
-#: supervisor/shared/board_busses.c
-msgid "No default I2C bus"
-msgstr "Kein Standard I2C Bus"
-
-#: supervisor/shared/board_busses.c
-msgid "No default SPI bus"
-msgstr "Kein Standard SPI Bus"
-
-#: supervisor/shared/board_busses.c
-msgid "No default UART bus"
-msgstr "Kein Standard UART Bus"
+#: shared-bindings/board/__init__.c
+msgid "No default %q bus"
+msgstr "Kein Standard %q Bus"
 
 #: ports/atmel-samd/common-hal/touchio/TouchIn.c
 msgid "No free GCLKs"
diff --git a/locale/en_US.po b/locale/en_US.po
index 1f422aeeed..fb62ea2b03 100644
--- a/locale/en_US.po
+++ b/locale/en_US.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-04-04 13:37-0700\n"
+"POT-Creation-Date: 2019-04-08 16:48-0700\n"
 "PO-Revision-Date: 2018-07-27 11:55-0700\n"
 "Last-Translator: \n"
 "Language-Team: \n"
@@ -899,16 +899,8 @@ msgstr ""
 msgid "No available clocks"
 msgstr ""
 
-#: supervisor/shared/board_busses.c
-msgid "No default I2C bus"
-msgstr ""
-
-#: supervisor/shared/board_busses.c
-msgid "No default SPI bus"
-msgstr ""
-
-#: supervisor/shared/board_busses.c
-msgid "No default UART bus"
+#: shared-bindings/board/__init__.c
+msgid "No default %q bus"
 msgstr ""
 
 #: ports/atmel-samd/common-hal/touchio/TouchIn.c
diff --git a/locale/en_x_pirate.po b/locale/en_x_pirate.po
index e0bfa9f911..24af776c03 100644
--- a/locale/en_x_pirate.po
+++ b/locale/en_x_pirate.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-04-04 13:37-0700\n"
+"POT-Creation-Date: 2019-04-08 16:48-0700\n"
 "PO-Revision-Date: 2018-07-27 11:55-0700\n"
 "Last-Translator: \n"
 "Language-Team: @sommersoft, @MrCertainly\n"
@@ -903,16 +903,8 @@ msgstr ""
 msgid "No available clocks"
 msgstr ""
 
-#: supervisor/shared/board_busses.c
-msgid "No default I2C bus"
-msgstr ""
-
-#: supervisor/shared/board_busses.c
-msgid "No default SPI bus"
-msgstr ""
-
-#: supervisor/shared/board_busses.c
-msgid "No default UART bus"
+#: shared-bindings/board/__init__.c
+msgid "No default %q bus"
 msgstr ""
 
 #: ports/atmel-samd/common-hal/touchio/TouchIn.c
diff --git a/locale/es.po b/locale/es.po
index be64267498..661c591d31 100644
--- a/locale/es.po
+++ b/locale/es.po
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-04-04 13:37-0700\n"
+"POT-Creation-Date: 2019-04-08 16:48-0700\n"
 "PO-Revision-Date: 2018-08-24 22:56-0500\n"
 "Last-Translator: \n"
 "Language-Team: \n"
@@ -937,17 +937,9 @@ msgstr "Sin pin TX"
 msgid "No available clocks"
 msgstr "Relojes no disponibles"
 
-#: supervisor/shared/board_busses.c
-msgid "No default I2C bus"
-msgstr "Sin bus I2C por defecto"
-
-#: supervisor/shared/board_busses.c
-msgid "No default SPI bus"
-msgstr "Sin bus SPI por defecto"
-
-#: supervisor/shared/board_busses.c
-msgid "No default UART bus"
-msgstr "Sin bus UART por defecto"
+#: shared-bindings/board/__init__.c
+msgid "No default %q bus"
+msgstr "Sin bus %q por defecto"
 
 #: ports/atmel-samd/common-hal/touchio/TouchIn.c
 msgid "No free GCLKs"
diff --git a/locale/fil.po b/locale/fil.po
index dd838cb665..7873ec6853 100644
--- a/locale/fil.po
+++ b/locale/fil.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-04-04 13:37-0700\n"
+"POT-Creation-Date: 2019-04-08 16:48-0700\n"
 "PO-Revision-Date: 2018-12-20 22:15-0800\n"
 "Last-Translator: Timothy <me@timothygarcia.ca>\n"
 "Language-Team: fil\n"
@@ -933,17 +933,9 @@ msgstr "Walang TX pin"
 msgid "No available clocks"
 msgstr ""
 
-#: supervisor/shared/board_busses.c
-msgid "No default I2C bus"
-msgstr "Walang default na I2C bus"
-
-#: supervisor/shared/board_busses.c
-msgid "No default SPI bus"
-msgstr "Walang default SPI bus"
-
-#: supervisor/shared/board_busses.c
-msgid "No default UART bus"
-msgstr "Walang default UART bus"
+#: shared-bindings/board/__init__.c
+msgid "No default %q bus"
+msgstr "Walang default na %q bus"
 
 #: ports/atmel-samd/common-hal/touchio/TouchIn.c
 msgid "No free GCLKs"
diff --git a/locale/fr.po b/locale/fr.po
index 9733a01031..9c723333d6 100644
--- a/locale/fr.po
+++ b/locale/fr.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: 0.1\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-04-04 13:37-0700\n"
+"POT-Creation-Date: 2019-04-08 16:48-0700\n"
 "PO-Revision-Date: 2018-12-23 20:05+0100\n"
 "Last-Translator: Pierrick Couturier <arofarn@arofarn.info>\n"
 "Language-Team: fr\n"
@@ -936,17 +936,9 @@ msgstr "Pas de broche TX"
 msgid "No available clocks"
 msgstr ""
 
-#: supervisor/shared/board_busses.c
-msgid "No default I2C bus"
-msgstr "Pas de bus I2C par défaut"
-
-#: supervisor/shared/board_busses.c
-msgid "No default SPI bus"
-msgstr "Pas de bus SPI par défaut"
-
-#: supervisor/shared/board_busses.c
-msgid "No default UART bus"
-msgstr "Pas de bus UART par défaut"
+#: shared-bindings/board/__init__.c
+msgid "No default %q bus"
+msgstr "Pas de bus %q par défaut"
 
 #: ports/atmel-samd/common-hal/touchio/TouchIn.c
 msgid "No free GCLKs"
diff --git a/locale/it_IT.po b/locale/it_IT.po
index 04ee36063f..c14b3698ba 100644
--- a/locale/it_IT.po
+++ b/locale/it_IT.po
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-04-04 13:37-0700\n"
+"POT-Creation-Date: 2019-04-08 16:48-0700\n"
 "PO-Revision-Date: 2018-10-02 16:27+0200\n"
 "Last-Translator: Enrico Paganin <enrico.paganin@mail.com>\n"
 "Language-Team: \n"
@@ -932,17 +932,9 @@ msgstr "Nessun pin TX"
 msgid "No available clocks"
 msgstr ""
 
-#: supervisor/shared/board_busses.c
-msgid "No default I2C bus"
-msgstr "Nessun bus I2C predefinito"
-
-#: supervisor/shared/board_busses.c
-msgid "No default SPI bus"
-msgstr "Nessun bus SPI predefinito"
-
-#: supervisor/shared/board_busses.c
-msgid "No default UART bus"
-msgstr "Nessun bus UART predefinito"
+#: shared-bindings/board/__init__.c
+msgid "No default %q bus"
+msgstr "Nessun bus %q predefinito"
 
 #: ports/atmel-samd/common-hal/touchio/TouchIn.c
 msgid "No free GCLKs"
diff --git a/locale/pl.po b/locale/pl.po
index d845dc260e..1b861fff0f 100644
--- a/locale/pl.po
+++ b/locale/pl.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-04-04 13:37-0700\n"
+"POT-Creation-Date: 2019-04-08 16:48-0700\n"
 "PO-Revision-Date: 2019-03-19 18:37-0700\n"
 "Last-Translator: Radomir Dopieralski <circuitpython@sheep.art.pl>\n"
 "Language-Team: pl\n"
@@ -909,17 +909,9 @@ msgstr "Brak nóżki TX"
 msgid "No available clocks"
 msgstr "Brak dostępnych zegarów"
 
-#: supervisor/shared/board_busses.c
-msgid "No default I2C bus"
-msgstr "Nie ma domyślnej magistrali I2C"
-
-#: supervisor/shared/board_busses.c
-msgid "No default SPI bus"
-msgstr "Nie ma domyślnej magistrali SPI"
-
-#: supervisor/shared/board_busses.c
-msgid "No default UART bus"
-msgstr "Nie ma domyślnej magistrali UART"
+#: shared-bindings/board/__init__.c
+msgid "No default %q bus"
+msgstr "Nie ma domyślnej magistrali %q"
 
 #: ports/atmel-samd/common-hal/touchio/TouchIn.c
 msgid "No free GCLKs"
diff --git a/locale/pt_BR.po b/locale/pt_BR.po
index 9925764863..4685e9c82a 100644
--- a/locale/pt_BR.po
+++ b/locale/pt_BR.po
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2019-04-04 13:37-0700\n"
+"POT-Creation-Date: 2019-04-08 16:48-0700\n"
 "PO-Revision-Date: 2018-10-02 21:14-0000\n"
 "Last-Translator: \n"
 "Language-Team: \n"
@@ -922,17 +922,9 @@ msgstr "Nenhum pino TX"
 msgid "No available clocks"
 msgstr ""
 
-#: supervisor/shared/board_busses.c
-msgid "No default I2C bus"
-msgstr "Nenhum barramento I2C padrão"
-
-#: supervisor/shared/board_busses.c
-msgid "No default SPI bus"
-msgstr "Nenhum barramento SPI padrão"
-
-#: supervisor/shared/board_busses.c
-msgid "No default UART bus"
-msgstr "Nenhum barramento UART padrão"
+#: shared-bindings/board/__init__.c
+msgid "No default %q bus"
+msgstr "Nenhum barramento %q padrão"
 
 #: ports/atmel-samd/common-hal/touchio/TouchIn.c
 msgid "No free GCLKs"
diff --git a/main.c b/main.c
index 77498d7dee..dc47a70de7 100755
--- a/main.c
+++ b/main.c
@@ -50,7 +50,6 @@
 #include "supervisor/port.h"
 #include "supervisor/filesystem.h"
 #include "supervisor/shared/autoreload.h"
-#include "supervisor/shared/board_busses.h"
 #include "supervisor/shared/translate.h"
 #include "supervisor/shared/rgb_led_status.h"
 #include "supervisor/shared/safe_mode.h"
@@ -62,6 +61,10 @@
 #include "shared-module/network/__init__.h"
 #endif
 
+#if CIRCUITPY_BOARD
+#include "shared-module/board/__init__.h"
+#endif
+
 void do_str(const char *src, mp_parse_input_kind_t input_kind) {
     mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, src, strlen(src), 0);
     if (lex == NULL) {
diff --git a/ports/atmel-samd/boards/arduino_mkr1300/pins.c b/ports/atmel-samd/boards/arduino_mkr1300/pins.c
index a5a058acec..7a73e89bf9 100644
--- a/ports/atmel-samd/boards/arduino_mkr1300/pins.c
+++ b/ports/atmel-samd/boards/arduino_mkr1300/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PB02) },
diff --git a/ports/atmel-samd/boards/arduino_mkrzero/pins.c b/ports/atmel-samd/boards/arduino_mkrzero/pins.c
index 654c0d6dae..2494076ab1 100644
--- a/ports/atmel-samd/boards/arduino_mkrzero/pins.c
+++ b/ports/atmel-samd/boards/arduino_mkrzero/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PB02) },
diff --git a/ports/atmel-samd/boards/arduino_zero/pins.c b/ports/atmel-samd/boards/arduino_zero/pins.c
index f9403bb9ad..7ebcc9a6e3 100644
--- a/ports/atmel-samd/boards/arduino_zero/pins.c
+++ b/ports/atmel-samd/boards/arduino_zero/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PB08) },
diff --git a/ports/atmel-samd/boards/catwan_usbstick/pins.c b/ports/atmel-samd/boards/catwan_usbstick/pins.c
index 87ee84c0be..346bd9c10c 100644
--- a/ports/atmel-samd/boards/catwan_usbstick/pins.c
+++ b/ports/atmel-samd/boards/catwan_usbstick/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_D0), MP_ROM_PTR(&pin_PA30) },
     { MP_ROM_QSTR(MP_QSTR_D1), MP_ROM_PTR(&pin_PA31) },
diff --git a/ports/atmel-samd/boards/circuitplayground_express/pins.c b/ports/atmel-samd/boards/circuitplayground_express/pins.c
index 70743366ed..6fc46bd216 100644
--- a/ports/atmel-samd/boards/circuitplayground_express/pins.c
+++ b/ports/atmel-samd/boards/circuitplayground_express/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_D12), MP_ROM_PTR(&pin_PA02) },
diff --git a/ports/atmel-samd/boards/circuitplayground_express_crickit/pins.c b/ports/atmel-samd/boards/circuitplayground_express_crickit/pins.c
index 70743366ed..6fc46bd216 100644
--- a/ports/atmel-samd/boards/circuitplayground_express_crickit/pins.c
+++ b/ports/atmel-samd/boards/circuitplayground_express_crickit/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_D12), MP_ROM_PTR(&pin_PA02) },
diff --git a/ports/atmel-samd/boards/cp32-m4/pins.c b/ports/atmel-samd/boards/cp32-m4/pins.c
index 9da67dfb44..bbad6f75f4 100644
--- a/ports/atmel-samd/boards/cp32-m4/pins.c
+++ b/ports/atmel-samd/boards/cp32-m4/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 // This mapping only includes functional names because pins broken
 // out on connectors are labeled with their MCU name available from
 // microcontroller.pin.
diff --git a/ports/atmel-samd/boards/datalore_ip_m4/pins.c b/ports/atmel-samd/boards/datalore_ip_m4/pins.c
index 63ae319a2b..4eb26dd21b 100644
--- a/ports/atmel-samd/boards/datalore_ip_m4/pins.c
+++ b/ports/atmel-samd/boards/datalore_ip_m4/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 // This mapping only includes functional names because pins broken
 // out on connectors are labeled with their MCU name available from
 // microcontroller.pin.
diff --git a/ports/atmel-samd/boards/feather_m0_adalogger/pins.c b/ports/atmel-samd/boards/feather_m0_adalogger/pins.c
index d99e62c955..63d134952b 100644
--- a/ports/atmel-samd/boards/feather_m0_adalogger/pins.c
+++ b/ports/atmel-samd/boards/feather_m0_adalogger/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PB08) },
diff --git a/ports/atmel-samd/boards/feather_m0_basic/pins.c b/ports/atmel-samd/boards/feather_m0_basic/pins.c
index f9b6db63be..f15ec2e9d6 100644
--- a/ports/atmel-samd/boards/feather_m0_basic/pins.c
+++ b/ports/atmel-samd/boards/feather_m0_basic/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PB08) },
diff --git a/ports/atmel-samd/boards/feather_m0_express/pins.c b/ports/atmel-samd/boards/feather_m0_express/pins.c
index 1eaa98a586..3c4effbe3b 100644
--- a/ports/atmel-samd/boards/feather_m0_express/pins.c
+++ b/ports/atmel-samd/boards/feather_m0_express/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PB08) },
diff --git a/ports/atmel-samd/boards/feather_m0_express_crickit/pins.c b/ports/atmel-samd/boards/feather_m0_express_crickit/pins.c
index 1eaa98a586..3c4effbe3b 100644
--- a/ports/atmel-samd/boards/feather_m0_express_crickit/pins.c
+++ b/ports/atmel-samd/boards/feather_m0_express_crickit/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PB08) },
diff --git a/ports/atmel-samd/boards/feather_m0_rfm69/pins.c b/ports/atmel-samd/boards/feather_m0_rfm69/pins.c
index ba59cb69b6..178f945ad4 100644
--- a/ports/atmel-samd/boards/feather_m0_rfm69/pins.c
+++ b/ports/atmel-samd/boards/feather_m0_rfm69/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PB08) },
diff --git a/ports/atmel-samd/boards/feather_m0_rfm9x/pins.c b/ports/atmel-samd/boards/feather_m0_rfm9x/pins.c
index 29a01d4056..977cb9fdfe 100644
--- a/ports/atmel-samd/boards/feather_m0_rfm9x/pins.c
+++ b/ports/atmel-samd/boards/feather_m0_rfm9x/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PB08) },
diff --git a/ports/atmel-samd/boards/feather_m0_supersized/pins.c b/ports/atmel-samd/boards/feather_m0_supersized/pins.c
index 1eaa98a586..3c4effbe3b 100644
--- a/ports/atmel-samd/boards/feather_m0_supersized/pins.c
+++ b/ports/atmel-samd/boards/feather_m0_supersized/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PB08) },
diff --git a/ports/atmel-samd/boards/feather_m4_express/pins.c b/ports/atmel-samd/boards/feather_m4_express/pins.c
index cec9fe37f1..d9496ecfc7 100644
--- a/ports/atmel-samd/boards/feather_m4_express/pins.c
+++ b/ports/atmel-samd/boards/feather_m4_express/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PA05) },
diff --git a/ports/atmel-samd/boards/feather_radiofruit_zigbee/pins.c b/ports/atmel-samd/boards/feather_radiofruit_zigbee/pins.c
index 211596f786..7133978784 100755
--- a/ports/atmel-samd/boards/feather_radiofruit_zigbee/pins.c
+++ b/ports/atmel-samd/boards/feather_radiofruit_zigbee/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PB02) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PB03) },
diff --git a/ports/atmel-samd/boards/gemma_m0/pins.c b/ports/atmel-samd/boards/gemma_m0/pins.c
index b24b458388..9aecd5d84e 100644
--- a/ports/atmel-samd/boards/gemma_m0/pins.c
+++ b/ports/atmel-samd/boards/gemma_m0/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A1),  MP_ROM_PTR(&pin_PA05) }, // pad 1
     { MP_ROM_QSTR(MP_QSTR_D2),  MP_ROM_PTR(&pin_PA05) },
diff --git a/ports/atmel-samd/boards/grandcentral_m4_express/pins.c b/ports/atmel-samd/boards/grandcentral_m4_express/pins.c
index 26d0e71a0e..6b09c62bf3 100644
--- a/ports/atmel-samd/boards/grandcentral_m4_express/pins.c
+++ b/ports/atmel-samd/boards/grandcentral_m4_express/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 // This mapping only includes functional names because pins broken
 // out on connectors are labeled with their MCU name available from
 // microcontroller.pin.
diff --git a/ports/atmel-samd/boards/hallowing_m0_express/pins.c b/ports/atmel-samd/boards/hallowing_m0_express/pins.c
index 3db1b17524..3e670a676f 100644
--- a/ports/atmel-samd/boards/hallowing_m0_express/pins.c
+++ b/ports/atmel-samd/boards/hallowing_m0_express/pins.c
@@ -1,7 +1,6 @@
 #include "shared-bindings/board/__init__.h"
 
 #include "boards/board.h"
-#include "supervisor/shared/board_busses.h"
 #include "shared-module/displayio/__init__.h"
 
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
diff --git a/ports/atmel-samd/boards/itsybitsy_m0_express/pins.c b/ports/atmel-samd/boards/itsybitsy_m0_express/pins.c
index 912fba4edc..1b0e5d09eb 100644
--- a/ports/atmel-samd/boards/itsybitsy_m0_express/pins.c
+++ b/ports/atmel-samd/boards/itsybitsy_m0_express/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_D0), MP_ROM_PTR(&pin_PA11) },
     { MP_ROM_QSTR(MP_QSTR_RX), MP_ROM_PTR(&pin_PA11) },
diff --git a/ports/atmel-samd/boards/itsybitsy_m4_express/pins.c b/ports/atmel-samd/boards/itsybitsy_m4_express/pins.c
index ed91c88ee7..8cd2f44f89 100644
--- a/ports/atmel-samd/boards/itsybitsy_m4_express/pins.c
+++ b/ports/atmel-samd/boards/itsybitsy_m4_express/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 // This mapping only includes functional names because pins broken
 // out on connectors are labeled with their MCU name available from
 // microcontroller.pin.
diff --git a/ports/atmel-samd/boards/meowmeow/pins.c b/ports/atmel-samd/boards/meowmeow/pins.c
index 089baad32e..41d122d874 100644
--- a/ports/atmel-samd/boards/meowmeow/pins.c
+++ b/ports/atmel-samd/boards/meowmeow/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PA03) },
diff --git a/ports/atmel-samd/boards/metro_m0_express/pins.c b/ports/atmel-samd/boards/metro_m0_express/pins.c
index 0707a35819..c11fac5ce6 100644
--- a/ports/atmel-samd/boards/metro_m0_express/pins.c
+++ b/ports/atmel-samd/boards/metro_m0_express/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PB08) },
diff --git a/ports/atmel-samd/boards/metro_m4_airlift_lite/pins.c b/ports/atmel-samd/boards/metro_m4_airlift_lite/pins.c
index 4b72c42f0a..4e90870c49 100644
--- a/ports/atmel-samd/boards/metro_m4_airlift_lite/pins.c
+++ b/ports/atmel-samd/boards/metro_m4_airlift_lite/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 // This mapping only includes functional names because pins broken
 // out on connectors are labeled with their MCU name available from
 // microcontroller.pin.
diff --git a/ports/atmel-samd/boards/metro_m4_express/pins.c b/ports/atmel-samd/boards/metro_m4_express/pins.c
index 63ae319a2b..4eb26dd21b 100644
--- a/ports/atmel-samd/boards/metro_m4_express/pins.c
+++ b/ports/atmel-samd/boards/metro_m4_express/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 // This mapping only includes functional names because pins broken
 // out on connectors are labeled with their MCU name available from
 // microcontroller.pin.
diff --git a/ports/atmel-samd/boards/mini_sam_m4/pins.c b/ports/atmel-samd/boards/mini_sam_m4/pins.c
index f78fe1bc83..b1d8d5325c 100644
--- a/ports/atmel-samd/boards/mini_sam_m4/pins.c
+++ b/ports/atmel-samd/boards/mini_sam_m4/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 // This mapping only includes functional names because pins broken
 // out on connectors are labeled with their MCU name available from
 // microcontroller.pin.
diff --git a/ports/atmel-samd/boards/pewpew10/pins.c b/ports/atmel-samd/boards/pewpew10/pins.c
index e2552dc325..9e5b9d98ec 100644
--- a/ports/atmel-samd/boards/pewpew10/pins.c
+++ b/ports/atmel-samd/boards/pewpew10/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     // Pins for internal use.
     { MP_ROM_QSTR(MP_QSTR__R1),  MP_ROM_PTR(&pin_PA05) },
diff --git a/ports/atmel-samd/boards/pirkey_m0/pins.c b/ports/atmel-samd/boards/pirkey_m0/pins.c
index a6dbcefe3e..e1f43c83cc 100644
--- a/ports/atmel-samd/boards/pirkey_m0/pins.c
+++ b/ports/atmel-samd/boards/pirkey_m0/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_REMOTEIN),   MP_ROM_PTR(&pin_PA28) },
 
diff --git a/ports/atmel-samd/boards/pybadge/board.c b/ports/atmel-samd/boards/pybadge/board.c
index 867fb9fa48..f234db8caf 100644
--- a/ports/atmel-samd/boards/pybadge/board.c
+++ b/ports/atmel-samd/boards/pybadge/board.c
@@ -69,16 +69,15 @@ uint8_t display_init_sequence[] = {
     0x29, 0 | DELAY, 100, // _DISPON
 };
 
-STATIC busio_spi_obj_t display_spi_obj;
-
 void board_init(void) {
-    common_hal_busio_spi_construct(&display_spi_obj, &pin_PB13, &pin_PB12, NULL);
-    common_hal_busio_spi_never_reset(&display_spi_obj);
+    busio_spi_obj_t* spi = &displays[0].fourwire_bus.inline_bus;
+    common_hal_busio_spi_construct(spi, &pin_PB13, &pin_PB12, NULL);
+    common_hal_busio_spi_never_reset(spi);
 
     displayio_fourwire_obj_t* bus = &displays[0].fourwire_bus;
     bus->base.type = &displayio_fourwire_type;
     common_hal_displayio_fourwire_construct(bus,
-        &display_spi_obj,
+        spi,
         &pin_PB05, // TFT_DC Command or data
         &pin_PB07, // TFT_CS Chip select
         &pin_PA01); // TFT_RST Reset
diff --git a/ports/atmel-samd/boards/pybadge/pins.c b/ports/atmel-samd/boards/pybadge/pins.c
index 41ab634c9e..2134cf8c72 100644
--- a/ports/atmel-samd/boards/pybadge/pins.c
+++ b/ports/atmel-samd/boards/pybadge/pins.c
@@ -1,7 +1,6 @@
 #include "shared-bindings/board/__init__.h"
 
 #include "boards/board.h"
-#include "supervisor/shared/board_busses.h"
 #include "shared-module/displayio/__init__.h"
 
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
diff --git a/ports/atmel-samd/boards/pyportal/board.c b/ports/atmel-samd/boards/pyportal/board.c
index d0a6020661..222e111447 100644
--- a/ports/atmel-samd/boards/pyportal/board.c
+++ b/ports/atmel-samd/boards/pyportal/board.c
@@ -25,7 +25,6 @@
  */
 
 #include "boards/board.h"
-#include "supervisor/shared/board_busses.h"
 #include "mpconfigboard.h"
 #include "hal/include/hal_gpio.h"
 
diff --git a/ports/atmel-samd/boards/pyportal/pins.c b/ports/atmel-samd/boards/pyportal/pins.c
index 4a41ee913e..14699a209d 100644
--- a/ports/atmel-samd/boards/pyportal/pins.c
+++ b/ports/atmel-samd/boards/pyportal/pins.c
@@ -2,7 +2,6 @@
 
 #include "boards/board.h"
 #include "shared-module/displayio/__init__.h"
-#include "supervisor/shared/board_busses.h"
 
 // This mapping only includes functional names because pins broken
 // out on connectors are labeled with their MCU name available from
diff --git a/ports/atmel-samd/boards/sam32/pins.c b/ports/atmel-samd/boards/sam32/pins.c
index b2e0a3f2be..f32057d754 100644
--- a/ports/atmel-samd/boards/sam32/pins.c
+++ b/ports/atmel-samd/boards/sam32/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0),   MP_ROM_PTR(&pin_PB08)  },
     { MP_ROM_QSTR(MP_QSTR_A1),   MP_ROM_PTR(&pin_PB09)  },
diff --git a/ports/atmel-samd/boards/sparkfun_lumidrive/pins.c b/ports/atmel-samd/boards/sparkfun_lumidrive/pins.c
index 232c89e380..f2faa901d0 100755
--- a/ports/atmel-samd/boards/sparkfun_lumidrive/pins.c
+++ b/ports/atmel-samd/boards/sparkfun_lumidrive/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A3), MP_ROM_PTR(&pin_PA04) },
     { MP_ROM_QSTR(MP_QSTR_A4), MP_ROM_PTR(&pin_PA05) },
diff --git a/ports/atmel-samd/boards/sparkfun_redboard_turbo/pins.c b/ports/atmel-samd/boards/sparkfun_redboard_turbo/pins.c
index 223e20359e..485589fcaf 100755
--- a/ports/atmel-samd/boards/sparkfun_redboard_turbo/pins.c
+++ b/ports/atmel-samd/boards/sparkfun_redboard_turbo/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_PA02) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PB08) },
diff --git a/ports/atmel-samd/boards/sparkfun_samd21_dev/pins.c b/ports/atmel-samd/boards/sparkfun_samd21_dev/pins.c
index 9eab132c3e..039100956e 100644
--- a/ports/atmel-samd/boards/sparkfun_samd21_dev/pins.c
+++ b/ports/atmel-samd/boards/sparkfun_samd21_dev/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
 
     // Analog pins
diff --git a/ports/atmel-samd/boards/sparkfun_samd21_mini/pins.c b/ports/atmel-samd/boards/sparkfun_samd21_mini/pins.c
index 42cd3736b8..a90b0b5a30 100644
--- a/ports/atmel-samd/boards/sparkfun_samd21_mini/pins.c
+++ b/ports/atmel-samd/boards/sparkfun_samd21_mini/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
 
     // Analog pins
diff --git a/ports/atmel-samd/boards/trellis_m4_express/pins.c b/ports/atmel-samd/boards/trellis_m4_express/pins.c
index a9f2043185..4a0fa3ca21 100644
--- a/ports/atmel-samd/boards/trellis_m4_express/pins.c
+++ b/ports/atmel-samd/boards/trellis_m4_express/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 // This mapping only includes functional names because pins broken
 // out on connectors are labeled with their MCU name available from
 // microcontroller.pin.
diff --git a/ports/atmel-samd/boards/trinket_m0/pins.c b/ports/atmel-samd/boards/trinket_m0/pins.c
index b3637bd5bb..372601e628 100644
--- a/ports/atmel-samd/boards/trinket_m0/pins.c
+++ b/ports/atmel-samd/boards/trinket_m0/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_D0), MP_ROM_PTR(&pin_PA08) },
     { MP_ROM_QSTR(MP_QSTR_A2), MP_ROM_PTR(&pin_PA08) },
diff --git a/ports/atmel-samd/boards/trinket_m0_haxpress/pins.c b/ports/atmel-samd/boards/trinket_m0_haxpress/pins.c
index b3637bd5bb..372601e628 100644
--- a/ports/atmel-samd/boards/trinket_m0_haxpress/pins.c
+++ b/ports/atmel-samd/boards/trinket_m0_haxpress/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_D0), MP_ROM_PTR(&pin_PA08) },
     { MP_ROM_QSTR(MP_QSTR_A2), MP_ROM_PTR(&pin_PA08) },
diff --git a/ports/atmel-samd/boards/uchip/pins.c b/ports/atmel-samd/boards/uchip/pins.c
index 7476c60adc..65b1c79cce 100644
--- a/ports/atmel-samd/boards/uchip/pins.c
+++ b/ports/atmel-samd/boards/uchip/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_PA06) },
     { MP_ROM_QSTR(MP_QSTR_A2), MP_ROM_PTR(&pin_PA08) },
diff --git a/ports/atmel-samd/boards/ugame10/pins.c b/ports/atmel-samd/boards/ugame10/pins.c
index 71db52752f..904ac224b1 100644
--- a/ports/atmel-samd/boards/ugame10/pins.c
+++ b/ports/atmel-samd/boards/ugame10/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_global_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_X), MP_ROM_PTR(&pin_PA00) },
     { MP_ROM_QSTR(MP_QSTR_O), MP_ROM_PTR(&pin_PA01) },
diff --git a/ports/nrf/boards/feather_nrf52840_express/pins.c b/ports/nrf/boards/feather_nrf52840_express/pins.c
index c6f643761d..ec2689ab45 100644
--- a/ports/nrf/boards/feather_nrf52840_express/pins.c
+++ b/ports/nrf/boards/feather_nrf52840_express/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_P0_04) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_P0_05) },
diff --git a/ports/nrf/boards/makerdiary_nrf52840_mdk/pins.c b/ports/nrf/boards/makerdiary_nrf52840_mdk/pins.c
index 2d24e85979..5284c24842 100644
--- a/ports/nrf/boards/makerdiary_nrf52840_mdk/pins.c
+++ b/ports/nrf/boards/makerdiary_nrf52840_mdk/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
   { MP_ROM_QSTR(MP_QSTR_AIN0), MP_ROM_PTR(&pin_P0_02) },
   { MP_ROM_QSTR(MP_QSTR_AIN1), MP_ROM_PTR(&pin_P0_03) },
diff --git a/ports/nrf/boards/makerdiary_nrf52840_mdk_usb_dongle/pins.c b/ports/nrf/boards/makerdiary_nrf52840_mdk_usb_dongle/pins.c
index 10490c8cb1..006b247688 100644
--- a/ports/nrf/boards/makerdiary_nrf52840_mdk_usb_dongle/pins.c
+++ b/ports/nrf/boards/makerdiary_nrf52840_mdk_usb_dongle/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
   { MP_ROM_QSTR(MP_QSTR_AIN0), MP_ROM_PTR(&pin_P0_02) },
   { MP_ROM_QSTR(MP_QSTR_AIN1), MP_ROM_PTR(&pin_P0_03) },
diff --git a/ports/nrf/boards/particle_argon/pins.c b/ports/nrf/boards/particle_argon/pins.c
index 10d547f910..9fab9e6b6a 100644
--- a/ports/nrf/boards/particle_argon/pins.c
+++ b/ports/nrf/boards/particle_argon/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_P0_03) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_P0_04) },
diff --git a/ports/nrf/boards/particle_boron/pins.c b/ports/nrf/boards/particle_boron/pins.c
index 0b827a85a4..4d6f3e7de2 100644
--- a/ports/nrf/boards/particle_boron/pins.c
+++ b/ports/nrf/boards/particle_boron/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_P0_03) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_P0_04) },
diff --git a/ports/nrf/boards/particle_xenon/pins.c b/ports/nrf/boards/particle_xenon/pins.c
index 644face61c..a50c8b6418 100644
--- a/ports/nrf/boards/particle_xenon/pins.c
+++ b/ports/nrf/boards/particle_xenon/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_A0), MP_ROM_PTR(&pin_P0_03) },
     { MP_ROM_QSTR(MP_QSTR_A1), MP_ROM_PTR(&pin_P0_04) },
diff --git a/ports/nrf/boards/pca10056/pins.c b/ports/nrf/boards/pca10056/pins.c
index 510b6100e3..e00bc8a11e 100644
--- a/ports/nrf/boards/pca10056/pins.c
+++ b/ports/nrf/boards/pca10056/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_P0_00), MP_ROM_PTR(&pin_P0_00) },
     { MP_ROM_QSTR(MP_QSTR_P0_01), MP_ROM_PTR(&pin_P0_01) },
diff --git a/ports/nrf/boards/pca10059/pins.c b/ports/nrf/boards/pca10059/pins.c
index c43d3a9eb6..932b925d17 100644
--- a/ports/nrf/boards/pca10059/pins.c
+++ b/ports/nrf/boards/pca10059/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_P0_02), MP_ROM_PTR(&pin_P0_02) },
     { MP_ROM_QSTR(MP_QSTR_P0_04), MP_ROM_PTR(&pin_P0_04) },
diff --git a/ports/nrf/boards/sparkfun_nrf52840_mini/pins.c b/ports/nrf/boards/sparkfun_nrf52840_mini/pins.c
index f826ac771d..e7b61db584 100644
--- a/ports/nrf/boards/sparkfun_nrf52840_mini/pins.c
+++ b/ports/nrf/boards/sparkfun_nrf52840_mini/pins.c
@@ -1,7 +1,5 @@
 #include "shared-bindings/board/__init__.h"
 
-#include "supervisor/shared/board_busses.h"
-
 STATIC const mp_rom_map_elem_t board_module_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_D0), MP_ROM_PTR(&pin_P1_15) },      // D1/TX
     { MP_ROM_QSTR(MP_QSTR_D1), MP_ROM_PTR(&pin_P0_17) },      // D0/RX
diff --git a/py/circuitpy_defns.mk b/py/circuitpy_defns.mk
index 7a369817a4..342c0ab0c4 100644
--- a/py/circuitpy_defns.mk
+++ b/py/circuitpy_defns.mk
@@ -302,6 +302,7 @@ $(filter $(SRC_PATTERNS), \
 	bitbangio/OneWire.c \
 	bitbangio/SPI.c \
 	bitbangio/__init__.c \
+	board/__init__.c \
 	busio/OneWire.c \
 	displayio/Bitmap.c \
 	displayio/ColorConverter.c \
diff --git a/py/circuitpy_mpconfig.h b/py/circuitpy_mpconfig.h
index 6da3ae9109..441dd5badf 100644
--- a/py/circuitpy_mpconfig.h
+++ b/py/circuitpy_mpconfig.h
@@ -252,8 +252,29 @@ extern const struct _mp_obj_module_t bleio_module;
 #if CIRCUITPY_BOARD
 #define BOARD_MODULE           { MP_OBJ_NEW_QSTR(MP_QSTR_board), (mp_obj_t)&board_module },
 extern const struct _mp_obj_module_t board_module;
+
+#define BOARD_I2C (defined(DEFAULT_I2C_BUS_SDA) && defined(DEFAULT_I2C_BUS_SCL))
+#define BOARD_SPI (defined(DEFAULT_SPI_BUS_SCK) && defined(DEFAULT_SPI_BUS_MISO) && defined(DEFAULT_SPI_BUS_MOSI))
+#define BOARD_UART (defined(DEFAULT_UART_BUS_RX) && defined(DEFAULT_UART_BUS_TX))
+
+#if BOARD_I2C
+#define BOARD_I2C_ROOT_POINTER mp_obj_t shared_i2c_bus;
+#else
+#define BOARD_I2C_ROOT_POINTER
+#endif
+
+// SPI is always allocated off the heap.
+
+#if BOARD_UART
+#define BOARD_UART_ROOT_POINTER mp_obj_t shared_uart_bus;
+#else
+#define BOARD_UART_ROOT_POINTER
+#endif
+
 #else
 #define BOARD_MODULE
+#define BOARD_I2C_ROOT_POINTER
+#define BOARD_UART_ROOT_POINTER
 #endif
 
 #if CIRCUITPY_BUSIO
@@ -586,6 +607,8 @@ extern const struct _mp_obj_module_t ustack_module;
     mp_obj_t gamepad_singleton; \
     mp_obj_t pew_singleton; \
     mp_obj_t terminal_tilegrid_tiles; \
+    BOARD_I2C_ROOT_POINTER \
+    BOARD_UART_ROOT_POINTER \
     FLASH_ROOT_POINTERS \
     NETWORK_ROOT_POINTERS \
 
diff --git a/py/gc.c b/py/gc.c
index 81e609730e..246df15031 100755
--- a/py/gc.c
+++ b/py/gc.c
@@ -176,6 +176,8 @@ void gc_init(void *start, void *end) {
     mp_thread_mutex_init(&MP_STATE_MEM(gc_mutex));
     #endif
 
+    MP_STATE_MEM(permanent_pointers) = NULL;
+
     DEBUG_printf("GC layout:\n");
     DEBUG_printf("  alloc table at %p, length " UINT_FMT " bytes, " UINT_FMT " blocks\n", MP_STATE_MEM(gc_alloc_table_start), MP_STATE_MEM(gc_alloc_table_byte_len), MP_STATE_MEM(gc_alloc_table_byte_len) * BLOCKS_PER_ATB);
 #if MICROPY_ENABLE_FINALISER
@@ -359,6 +361,10 @@ void gc_collect_start(void) {
     size_t root_end = offsetof(mp_state_ctx_t, vm.qstr_last_chunk);
     gc_collect_root(ptrs + root_start / sizeof(void*), (root_end - root_start) / sizeof(void*));
 
+    if (MP_STATE_MEM(permanent_pointers) != NULL) {
+        gc_collect_root(MP_STATE_MEM(permanent_pointers), BYTES_PER_BLOCK / sizeof(void*));
+    }
+
     #if MICROPY_ENABLE_PYSTACK
     // Trace root pointers from the Python stack.
     ptrs = (void**)(void*)MP_STATE_THREAD(pystack_start);
@@ -938,6 +944,32 @@ void *gc_realloc(void *ptr_in, size_t n_bytes, bool allow_move) {
 }
 #endif // Alternative gc_realloc impl
 
+bool gc_never_free(void *ptr) {
+    // Pointers are stored in a linked list where each block is BYTES_PER_BLOCK long and the first
+    // pointer is the next block of pointers.
+    void ** current_reference_block = MP_STATE_MEM(permanent_pointers);
+    while (current_reference_block != NULL) {
+        for (size_t i = 1; i < BYTES_PER_BLOCK / sizeof(void*); i++) {
+            if (current_reference_block[i] == NULL) {
+                current_reference_block[i] = ptr;
+                return true;
+            }
+        }
+        current_reference_block = current_reference_block[0];
+    }
+    void** next_block = gc_alloc(BYTES_PER_BLOCK, false, true);
+    if (next_block == NULL) {
+        return false;
+    }
+    if (MP_STATE_MEM(permanent_pointers) == NULL) {
+        MP_STATE_MEM(permanent_pointers) = next_block;
+    } else {
+        current_reference_block[0] = next_block;
+    }
+    next_block[1] = ptr;
+    return true;
+}
+
 void gc_dump_info(void) {
     gc_info_t info;
     gc_info(&info);
diff --git a/py/gc.h b/py/gc.h
index c05e006b4f..757a2a6e00 100644
--- a/py/gc.h
+++ b/py/gc.h
@@ -57,6 +57,10 @@ bool gc_has_finaliser(const void *ptr);
 void *gc_make_long_lived(void *old_ptr);
 void *gc_realloc(void *ptr, size_t n_bytes, bool allow_move);
 
+// Prevents a pointer from ever being freed because it establishes a permanent reference to it. Use
+// very sparingly because it can leak memory.
+bool gc_never_free(void *ptr);
+
 typedef struct _gc_info_t {
     size_t total;
     size_t used;
diff --git a/py/mpstate.h b/py/mpstate.h
index eef8696d3f..a3d7e5dccb 100644
--- a/py/mpstate.h
+++ b/py/mpstate.h
@@ -103,6 +103,8 @@ typedef struct _mp_state_mem_t {
     // This is a global mutex used to make the GC thread-safe.
     mp_thread_mutex_t gc_mutex;
     #endif
+
+    void** permanent_pointers;
 } mp_state_mem_t;
 
 // This structure hold runtime and VM information.  It includes a section
diff --git a/shared-bindings/board/__init__.c b/shared-bindings/board/__init__.c
index 06c2f218fb..1092d40a01 100644
--- a/shared-bindings/board/__init__.c
+++ b/shared-bindings/board/__init__.c
@@ -37,6 +37,81 @@
 //|
 //| Common container for board base pin names. These will vary from board to
 //| board so don't expect portability when using this module.
+//|
+//| .. warning:: The board module varies by board. The APIs documented here may or may not be
+//|              available on a specific board.
+
+//| .. method:: I2C()
+//|
+//|   Returns the `busio.I2C` object for the board designated SDA and SCL pins. It is a singleton.
+//|
+
+#if BOARD_I2C
+mp_obj_t board_i2c(void) {
+    mp_obj_t singleton = common_hal_board_get_i2c();
+    if (singleton != NULL) {
+        return singleton;
+    }
+    assert_pin_free(DEFAULT_I2C_BUS_SDA);
+    assert_pin_free(DEFAULT_I2C_BUS_SCL);
+    return common_hal_board_create_i2c();
+}
+#else
+mp_obj_t board_i2c(void) {
+    mp_raise_NotImplementedError_varg(translate("No default %q bus"), MP_QSTR_I2C);
+    return NULL;
+}
+#endif
+MP_DEFINE_CONST_FUN_OBJ_0(board_i2c_obj, board_i2c);
+
+
+//| .. method:: SPI()
+//|
+//|   Returns the `busio.SPI` object for the board designated SCK, MOSI and MISO pins. It is a
+//|   singleton.
+//|
+#if BOARD_SPI
+mp_obj_t board_spi(void) {
+    mp_obj_t singleton = common_hal_board_get_spi();
+    if (singleton != NULL) {
+        return singleton;
+    }
+    assert_pin_free(DEFAULT_SPI_BUS_SCK);
+    assert_pin_free(DEFAULT_SPI_BUS_MOSI);
+    assert_pin_free(DEFAULT_SPI_BUS_MISO);
+    return common_hal_board_create_spi();
+}
+#else
+mp_obj_t board_spi(void) {
+    mp_raise_NotImplementedError_varg(translate("No default %q bus"), MP_QSTR_SPI);
+    return NULL;
+}
+#endif
+MP_DEFINE_CONST_FUN_OBJ_0(board_spi_obj, board_spi);
+
+//| .. method:: UART()
+//|
+//|   Returns the `busio.UART` object for the board designated TX and RX pins. It is a singleton.
+//|
+#if BOARD_UART
+mp_obj_t board_uart(void) {
+    mp_obj_t singleton = common_hal_board_get_uart();
+    if (singleton != NULL) {
+        return singleton;
+    }
+
+    assert_pin_free(DEFAULT_UART_BUS_RX);
+    assert_pin_free(DEFAULT_UART_BUS_TX);
+
+    return common_hal_board_create_uart();
+}
+#else
+mp_obj_t board_uart(void) {
+    mp_raise_NotImplementedError_varg(translate("No default %q bus"), MP_QSTR_SPI);
+    return NULL;
+}
+#endif
+MP_DEFINE_CONST_FUN_OBJ_0(board_uart_obj, board_uart);
 
 const mp_obj_module_t board_module = {
     .base = { &mp_type_module },
diff --git a/shared-bindings/board/__init__.h b/shared-bindings/board/__init__.h
index 2730e5f51b..a9b652ba8d 100644
--- a/shared-bindings/board/__init__.h
+++ b/shared-bindings/board/__init__.h
@@ -33,4 +33,16 @@
 
 extern const mp_obj_dict_t board_module_globals;
 
+mp_obj_t common_hal_board_get_i2c(void);
+mp_obj_t common_hal_board_create_i2c(void);
+MP_DECLARE_CONST_FUN_OBJ_0(board_i2c_obj);
+
+mp_obj_t common_hal_board_get_spi(void);
+mp_obj_t common_hal_board_create_spi(void);
+MP_DECLARE_CONST_FUN_OBJ_0(board_spi_obj);
+
+mp_obj_t common_hal_board_get_uart(void);
+mp_obj_t common_hal_board_create_uart(void);
+MP_DECLARE_CONST_FUN_OBJ_0(board_uart_obj);
+
 #endif  // MICROPY_INCLUDED_SHARED_BINDINGS_BOARD___INIT___H
diff --git a/shared-bindings/displayio/FourWire.h b/shared-bindings/displayio/FourWire.h
index b8b00372ce..b65b1b5b79 100644
--- a/shared-bindings/displayio/FourWire.h
+++ b/shared-bindings/displayio/FourWire.h
@@ -31,7 +31,6 @@
 #include "common-hal/microcontroller/Pin.h"
 
 #include "shared-module/displayio/Group.h"
-#include "supervisor/shared/board_busses.h"
 
 extern const mp_obj_type_t displayio_fourwire_type;
 
diff --git a/supervisor/shared/board_busses.c b/shared-module/board/__init__.c
similarity index 54%
rename from supervisor/shared/board_busses.c
rename to shared-module/board/__init__.c
index b2d04207df..65252dd0ad 100644
--- a/supervisor/shared/board_busses.c
+++ b/shared-module/board/__init__.c
@@ -37,35 +37,19 @@
 #include "shared-module/displayio/__init__.h"
 #endif
 
-#define BOARD_I2C (defined(DEFAULT_I2C_BUS_SDA) && defined(DEFAULT_I2C_BUS_SCL))
-#define BOARD_SPI (defined(DEFAULT_SPI_BUS_SCK) && defined(DEFAULT_SPI_BUS_MISO) && defined(DEFAULT_SPI_BUS_MOSI))
-#define BOARD_UART (defined(DEFAULT_UART_BUS_RX) && defined(DEFAULT_UART_BUS_TX))
-
-#if BOARD_I2C
-STATIC mp_obj_t i2c_singleton = NULL;
-
-mp_obj_t board_i2c(void) {
-
-    if (i2c_singleton == NULL) {
-        busio_i2c_obj_t *self = m_new_ll_obj(busio_i2c_obj_t);
-        self->base.type = &busio_i2c_type;
-
-        assert_pin_free(DEFAULT_I2C_BUS_SDA);
-        assert_pin_free(DEFAULT_I2C_BUS_SCL);
-        common_hal_busio_i2c_construct(self, DEFAULT_I2C_BUS_SCL, DEFAULT_I2C_BUS_SDA, 400000, 0);
-        i2c_singleton = (mp_obj_t)self;
-    }
-    return i2c_singleton;
+mp_obj_t common_hal_board_get_i2c(void) {
+    return MP_STATE_VM(shared_i2c_bus);
+}
+
+mp_obj_t common_hal_board_create_i2c(void) {
+    busio_i2c_obj_t *self = m_new_ll_obj(busio_i2c_obj_t);
+    self->base.type = &busio_i2c_type;
+
+    common_hal_busio_i2c_construct(self, DEFAULT_I2C_BUS_SCL, DEFAULT_I2C_BUS_SDA, 400000, 0);
+    MP_STATE_VM(shared_i2c_bus) = MP_OBJ_FROM_PTR(self);
+    return MP_STATE_VM(shared_i2c_bus);
 }
-#else
-mp_obj_t board_i2c(void) {
-    mp_raise_NotImplementedError(translate("No default I2C bus"));
-    return NULL;
-}
-#endif
-MP_DEFINE_CONST_FUN_OBJ_0(board_i2c_obj, board_i2c);
 
-#if BOARD_SPI
 // Statically allocate the SPI object so it can live past the end of the heap and into the next VM.
 // That way it can be used by built-in FourWire displays and be accessible through board.SPI().
 STATIC busio_spi_obj_t spi_obj;
@@ -82,11 +66,7 @@ mp_obj_t common_hal_board_create_spi(void) {
     }
     busio_spi_obj_t *self = &spi_obj;
     self->base.type = &busio_spi_type;
-    if (!common_hal_mcu_pin_is_free(DEFAULT_SPI_BUS_SCK) ||
-        !common_hal_mcu_pin_is_free(DEFAULT_SPI_BUS_MOSI) ||
-        !common_hal_mcu_pin_is_free(DEFAULT_SPI_BUS_MISO)) {
-        return NULL;
-    }
+
     const mcu_pin_obj_t* clock = MP_OBJ_TO_PTR(DEFAULT_SPI_BUS_SCK);
     const mcu_pin_obj_t* mosi = MP_OBJ_TO_PTR(DEFAULT_SPI_BUS_MOSI);
     const mcu_pin_obj_t* miso = MP_OBJ_TO_PTR(DEFAULT_SPI_BUS_MISO);
@@ -95,55 +75,25 @@ mp_obj_t common_hal_board_create_spi(void) {
     return spi_singleton;
 }
 
-mp_obj_t board_spi(void) {
-    mp_obj_t singleton = common_hal_board_get_spi();
-    if (singleton != NULL) {
-        return singleton;
-    }
-    assert_pin_free(DEFAULT_SPI_BUS_SCK);
-    assert_pin_free(DEFAULT_SPI_BUS_MOSI);
-    assert_pin_free(DEFAULT_SPI_BUS_MISO);
-    return common_hal_board_create_spi();
+mp_obj_t common_hal_board_get_uart(void) {
+    return MP_STATE_VM(shared_uart_bus);
 }
-#else
-mp_obj_t common_hal_board_spi(void) {
-    mp_raise_NotImplementedError(translate("No default SPI bus"));
-    return NULL;
+
+mp_obj_t common_hal_board_create_uart(void) {
+    busio_uart_obj_t *self = m_new_ll_obj(busio_uart_obj_t);
+    self->base.type = &busio_uart_type;
+
+    const mcu_pin_obj_t* rx = MP_OBJ_TO_PTR(DEFAULT_UART_BUS_RX);
+    const mcu_pin_obj_t* tx = MP_OBJ_TO_PTR(DEFAULT_UART_BUS_TX);
+
+    common_hal_busio_uart_construct(self, tx, rx, 9600, 8, PARITY_NONE, 1, 1000, 64);
+    MP_STATE_VM(shared_uart_bus) = MP_OBJ_FROM_PTR(self);
+    return MP_STATE_VM(shared_uart_bus);
 }
-#endif
-MP_DEFINE_CONST_FUN_OBJ_0(board_spi_obj, board_spi);
-
-#if BOARD_UART
-STATIC mp_obj_t uart_singleton = NULL;
-
-mp_obj_t board_uart(void) {
-    if (uart_singleton == NULL) {
-        busio_uart_obj_t *self = m_new_ll_obj(busio_uart_obj_t);
-        self->base.type = &busio_uart_type;
-
-        assert_pin_free(DEFAULT_UART_BUS_RX);
-        assert_pin_free(DEFAULT_UART_BUS_TX);
-
-        const mcu_pin_obj_t* rx = MP_OBJ_TO_PTR(DEFAULT_UART_BUS_RX);
-        const mcu_pin_obj_t* tx = MP_OBJ_TO_PTR(DEFAULT_UART_BUS_TX);
-
-        common_hal_busio_uart_construct(self, tx, rx, 9600, 8, PARITY_NONE, 1, 1000, 64);
-        uart_singleton = (mp_obj_t)self;
-    }
-    return uart_singleton;
-}
-#else
-mp_obj_t board_uart(void) {
-    mp_raise_NotImplementedError(translate("No default UART bus"));
-    return NULL;
-}
-#endif
-MP_DEFINE_CONST_FUN_OBJ_0(board_uart_obj, board_uart);
-
 
 void reset_board_busses(void) {
 #if BOARD_I2C
-    i2c_singleton = NULL;
+    MP_STATE_VM(shared_i2c_bus) = NULL;
 #endif
 #if BOARD_SPI
     bool display_using_spi = false;
@@ -160,6 +110,6 @@ void reset_board_busses(void) {
     }
 #endif
 #if BOARD_UART
-    uart_singleton = NULL;
+    MP_STATE_VM(shared_uart_bus) = NULL;
 #endif
 }
diff --git a/supervisor/shared/board_busses.h b/shared-module/board/__init__.h
similarity index 69%
rename from supervisor/shared/board_busses.h
rename to shared-module/board/__init__.h
index bdb3884f66..f7eecd4170 100644
--- a/supervisor/shared/board_busses.h
+++ b/shared-module/board/__init__.h
@@ -3,7 +3,7 @@
  *
  * The MIT License (MIT)
  *
- * Copyright (c) 2018 Scott Shawcroft for Adafruit Industries
+ * Copyright (c) 2019 Scott Shawcroft for Adafruit Industries
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -24,21 +24,9 @@
  * THE SOFTWARE.
  */
 
-#ifndef MICROPY_INCLUDED_SUPERVISOR_SHARED_BOARD_BUSSES_H
-#define MICROPY_INCLUDED_SUPERVISOR_SHARED_BOARD_BUSSES_H
-
-#include "py/obj.h"
-
-mp_obj_t common_hal_board_get_spi(void);
-mp_obj_t common_hal_board_create_spi(void);
-MP_DECLARE_CONST_FUN_OBJ_0(board_i2c_obj);
-
-mp_obj_t board_spi(void);
-MP_DECLARE_CONST_FUN_OBJ_0(board_spi_obj);
-
-mp_obj_t board_uart(void);
-MP_DECLARE_CONST_FUN_OBJ_0(board_uart_obj);
+#ifndef MICROPY_INCLUDED_SHARED_MODULE_BOARD__INIT__H
+#define MICROPY_INCLUDED_SHARED_MODULE_BOARD__INIT__H
 
 void reset_board_busses(void);
 
-#endif  // MICROPY_INCLUDED_SUPERVISOR_SHARED_BOARD_BUSSES_H
+#endif  // MICROPY_INCLUDED_SHARED_MODULE_BOARD__INIT__H
diff --git a/shared-module/displayio/FourWire.c b/shared-module/displayio/FourWire.c
index 043f68e265..2ca685f178 100644
--- a/shared-module/displayio/FourWire.c
+++ b/shared-module/displayio/FourWire.c
@@ -28,6 +28,7 @@
 
 #include <stdint.h>
 
+#include "py/gc.h"
 #include "shared-bindings/busio/SPI.h"
 #include "shared-bindings/digitalio/DigitalInOut.h"
 #include "shared-bindings/time/__init__.h"
@@ -40,6 +41,7 @@ void common_hal_displayio_fourwire_construct(displayio_fourwire_obj_t* self,
 
     self->bus = spi;
     common_hal_busio_spi_never_reset(self->bus);
+    gc_never_free(self->bus);
 
     common_hal_digitalio_digitalinout_construct(&self->command, command);
     common_hal_digitalio_digitalinout_switch_to_output(&self->command, true, DRIVE_MODE_PUSH_PULL);
diff --git a/shared-module/displayio/__init__.c b/shared-module/displayio/__init__.c
index 49c85f277b..c1f5a68100 100644
--- a/shared-module/displayio/__init__.c
+++ b/shared-module/displayio/__init__.c
@@ -5,6 +5,7 @@
 #include "lib/utils/interrupt_char.h"
 #include "py/reload.h"
 #include "py/runtime.h"
+#include "shared-bindings/board/__init__.h"
 #include "shared-bindings/displayio/Bitmap.h"
 #include "shared-bindings/displayio/Display.h"
 #include "shared-bindings/displayio/Group.h"
@@ -190,6 +191,9 @@ void reset_displays(void) {
         if (((uint32_t) fourwire->bus) < ((uint32_t) &displays) ||
             ((uint32_t) fourwire->bus) > ((uint32_t) &displays + CIRCUITPY_DISPLAY_LIMIT)) {
             busio_spi_obj_t* original_spi = fourwire->bus;
+            // We don't need to move original_spi if it is the board.SPI object because it is
+            // statically allocated already. (Doing so would also make it impossible to reference in
+            // a subsequent VM run.)
             if (original_spi == common_hal_board_get_spi()) {
                 continue;
             }
diff --git a/supervisor/shared/safe_mode.c b/supervisor/shared/safe_mode.c
index 7182bbccac..f965bc48a9 100644
--- a/supervisor/shared/safe_mode.c
+++ b/supervisor/shared/safe_mode.c
@@ -27,7 +27,6 @@
 #include "supervisor/shared/safe_mode.h"
 
 #include "mphalport.h"
-// #include "py/mpconfig.h"
 
 #include "shared-bindings/digitalio/DigitalInOut.h"
 
@@ -77,7 +76,7 @@ safe_mode_t wait_for_safe_mode_reset(void) {
     return NO_SAFE_MODE;
 }
 
-// Inline this so it's easy to break on it from GDB.
+// Don't inline this so it's easy to break on it from GDB.
 void __attribute__((noinline,)) reset_into_safe_mode(safe_mode_t reason) {
     if (current_safe_mode > BROWNOUT && reason > BROWNOUT) {
         while (true) {
diff --git a/supervisor/supervisor.mk b/supervisor/supervisor.mk
index 6815fba57b..95cffc0982 100644
--- a/supervisor/supervisor.mk
+++ b/supervisor/supervisor.mk
@@ -2,7 +2,6 @@ SRC_SUPERVISOR = \
 	main.c \
 	supervisor/port.c \
 	supervisor/shared/autoreload.c \
-	supervisor/shared/board_busses.c \
 	supervisor/shared/display.c \
 	supervisor/shared/filesystem.c \
 	supervisor/shared/flash.c \