diff --git a/src/main/drivers/system_stm32f7xx.c b/src/main/drivers/system_stm32f7xx.c
index fed1c61f9f..93a6c9e8dd 100644
--- a/src/main/drivers/system_stm32f7xx.c
+++ b/src/main/drivers/system_stm32f7xx.c
@@ -155,7 +155,7 @@ void systemInit(void)
     //SystemClock_Config();
 
     // Configure NVIC preempt/priority groups
-    //NVIC_PriorityGroupConfig(NVIC_PRIORITY_GROUPING);
+    HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITY_GROUPING);
 
     // cache RCC->CSR value to use it in isMPUSoftreset() and others
     cachedRccCsrValue = RCC->CSR;
diff --git a/src/main/target/link/stm32_flash_f745.ld b/src/main/target/link/stm32_flash_f745.ld
index 6c60e5c2c8..c8da9a3aa2 100644
--- a/src/main/target/link/stm32_flash_f745.ld
+++ b/src/main/target/link/stm32_flash_f745.ld
@@ -15,12 +15,14 @@ ENTRY(Reset_Handler)
 /* Specify the memory areas */
 MEMORY
 {
-    FLASH (rx)        : ORIGIN = 0x08000000, LENGTH = 1008K
-    FLASH_CONFIG (r)  : ORIGIN = 0x080FC000, LENGTH = 16K
+    FLASH (rx)        : ORIGIN = 0x08000000, LENGTH = 768K
+    FLASH_CONFIG (r)  : ORIGIN = 0x080C0000, LENGTH = 256K
 
-    RAM (rwx)         : ORIGIN = 0x20000000, LENGTH = 320K
+    TCM (rwx)         : ORIGIN = 0x20000000, LENGTH = 64K
+    RAM (rwx)         : ORIGIN = 0x20010000, LENGTH = 256K
     MEMORY_B1 (rx)    : ORIGIN = 0x60000000, LENGTH = 0K
 }
 /* note CCM could be used for stack */
+REGION_ALIAS("STACKRAM", TCM)
 
 INCLUDE "stm32_flash.ld"