diff --git a/libraries/AP_HAL_ChibiOS/hwdef/fmuv5/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/fmuv5/hwdef.dat
index 877537cbb1..7a86097a20 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/fmuv5/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/fmuv5/hwdef.dat
@@ -17,6 +17,7 @@ define STM32_PLLP_VALUE 2
 define STM32_PLLQ_VALUE 9
 
 define CONFIG_HAL_BOARD_SUBTYPE HAL_BOARD_SUBTYPE_CHIBIOS_FMUV5
+define HAL_CHIBIOS_ARCH_FMUV5 1
 
 # board ID for firmware load
 APJ_BOARD_ID 50
@@ -81,9 +82,20 @@ PG5  VDD_5V_RC_EN OUTPUT HIGH
 PG6  VDD_5V_WIFI_EN OUTPUT HIGH
 PG7  VDD_3V3_SD_CARD_EN OUTPUT HIGH
 
+# now the 2nd GPS UART
+# UART8 serial4 GPS2
+#PE0 UART8_RX UART8
+#PE1 UART8_TX UART8
+
+# UART for IOMCU
+#IOMCU_UART UART8
+
+# enable SBUS_OUT on IOMCU (if you have an IOMCU)
+define AP_FEATURE_SBUS_OUT 1
+
 SPIDEV ms5611         SPI4 DEVID1  MS5611_CS    MODE3 20*MHZ 20*MHZ
-SPIDEV mpu6000        SPI1 DEVID1  ICM20689_CS  MODE0  1*MHZ  1*MHZ
-SPIDEV icm20602       SPI1 DEVID2  ICM20602_CS  MODE0  1*MHZ  1*MHZ
+SPIDEV icm20689       SPI1 DEVID1  ICM20689_CS  MODE0  1*MHZ  8*MHZ
+SPIDEV icm20602       SPI1 DEVID2  ICM20602_CS  MODE0  1*MHZ  8*MHZ
 SPIDEV bmi055_g       SPI1 DEVID3  BMI055_G_CS  MODE3  8*MHZ  8*MHZ
 SPIDEV bmi055_a       SPI1 DEVID4  BMI055_A_CS  MODE3  8*MHZ  8*MHZ
 SPIDEV ramtron        SPI2 DEVID1  FRAM_CS      MODE3  8*MHZ  8*MHZ 
@@ -92,10 +104,9 @@ SPIDEV ramtron        SPI2 DEVID1  FRAM_CS      MODE3  8*MHZ  8*MHZ
 define HAL_STORAGE_SIZE 16384
 define HAL_WITH_RAMTRON 1
 
-define STORAGE_FLASH_PAGE 7
+define STORAGE_FLASH_PAGE 11
 
 define HAL_BARO_DEFAULT HAL_BARO_MS5611_SPI
-define HAL_INS_DEFAULT HAL_INS_MPU60XX_SPI
 
 define HAL_COMPASS_DEFAULT HAL_COMPASS_NONE
 
@@ -105,3 +116,5 @@ define CH_DBG_SYSTEM_STATE_CHECK TRUE
 define CH_DBG_ENABLE_STACK_CHECK TRUE
 
 # define HAL_SPI_CHECK_CLOCK_FREQ 1
+
+ROMFS io_firmware.bin Tools/IO_Firmware/fmuv2_IO.bin