diff --git a/Tools/bootloaders/X-MAV-AP-H743v2_bl.bin b/Tools/bootloaders/X-MAV-AP-H743v2_bl.bin
index 83e59826289a3f..1d28336d1c8d94 100755
Binary files a/Tools/bootloaders/X-MAV-AP-H743v2_bl.bin and b/Tools/bootloaders/X-MAV-AP-H743v2_bl.bin differ
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/X-MAV-AP-H743v2/README.md b/libraries/AP_HAL_ChibiOS/hwdef/X-MAV-AP-H743v2/README.md
index bca68bf98bef18..8c23137a9e396b 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/X-MAV-AP-H743v2/README.md
+++ b/libraries/AP_HAL_ChibiOS/hwdef/X-MAV-AP-H743v2/README.md
@@ -57,9 +57,6 @@ The AP-H743v2 supports up to 8 PWM outputs.
 
 All the channels support DShot and BiDir DShot.
 
-
-Channels 1-8 support bi-directional DShot.
-
 Outputs are grouped and every output within a group must use the same output protocol:
 
 
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/X-MAV-AP-H743v2/hwdef-bl.dat b/libraries/AP_HAL_ChibiOS/hwdef/X-MAV-AP-H743v2/hwdef-bl.dat
index b97d2d0edbd227..3749272a13644b 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/X-MAV-AP-H743v2/hwdef-bl.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/X-MAV-AP-H743v2/hwdef-bl.dat
@@ -41,3 +41,17 @@ PC13 ICM42688P_CS CS
 PD11 LED_ACTIVITY   OUTPUT HIGH GPIO(91)  #green
 PB15 LED_BOOTLOADER OUTPUT HIGH GPIO(92)  #blue
 define HAL_LED_ON 1
+
+# microSD support
+PC12 SDMMC1_CK  SDMMC1
+PD2  SDMMC1_CMD SDMMC1
+PC8  SDMMC1_D0  SDMMC1
+PC9  SDMMC1_D1  SDMMC1
+PC10 SDMMC1_D2  SDMMC1
+PC11 SDMMC1_D3  SDMMC1
+define FATFS_HAL_DEVICE SDCD1
+
+# enable FAT filesystem support (needs a microSD defined via SDMMC)
+define HAL_OS_FATFS_IO 1
+
+define AP_BOOTLOADER_FLASH_FROM_SD_ENABLED 1
\ No newline at end of file
diff --git a/libraries/AP_HAL_ChibiOS/hwdef/X-MAV-AP-H743v2/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/X-MAV-AP-H743v2/hwdef.dat
index 18da4c30d8f633..148e8be9b625db 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/X-MAV-AP-H743v2/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/X-MAV-AP-H743v2/hwdef.dat
@@ -168,8 +168,7 @@ COMPASS IST8310 I2C:ALL_INTERNAL:0x0E false ROTATION_YAW_90
 define HAL_OS_FATFS_IO 1
 
 #Serial Port defaults
-define DEFAULT_SERIAL1_PROTOCOL SerialProtocol_MAVLink2
-define DEFAULT_SERIAL3_PROTOCOL SerialProtocol_GPS
+define DEFAULT_SERIAL4_PROTOCOL SerialProtocol_None
 define DEFAULT_SERIAL6_PROTOCOL SerialProtocol_MSP_DisplayPort
 define DEFAULT_SERIAL7_PROTOCOL SerialProtocol_RCIN
 define DEFAULT_SERIAL8_PROTOCOL SerialProtocol_ESCTelemetry