diff --git a/nRF5_SDK_11.0.0_89a8197/components/toolchain/gcc/nrf52_common.ld b/nRF5_SDK_11.0.0_89a8197/components/toolchain/gcc/nrf52_common.ld
index 75e2f4c..95a0557 100644
--- a/nRF5_SDK_11.0.0_89a8197/components/toolchain/gcc/nrf52_common.ld
+++ b/nRF5_SDK_11.0.0_89a8197/components/toolchain/gcc/nrf52_common.ld
@@ -21,7 +21,7 @@ OUTPUT_FORMAT ("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
  * with other linker script that defines memory regions FLASH and RAM.
  * It references following symbols, which must be defined in code:
  *   Reset_Handler : Entry of reset handler
- * 
+ *
  * It defines following symbols, which code can use without definition:
  *   __exidx_start
  *   __exidx_end
@@ -38,6 +38,7 @@ OUTPUT_FORMAT ("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
  *   __bss_end__
  *   __end__
  *   end
+ *   __HeapBase
  *   __HeapLimit
  *   __StackLimit
  *   __StackTop
@@ -73,8 +74,8 @@ SECTIONS
 
         KEEP(*(.eh_frame*))
     } > FLASH
-    
-    .ARM.extab : 
+
+    .ARM.extab :
     {
         *(.ARM.extab* .gnu.linkonce.armextab.*)
     } > FLASH
@@ -87,7 +88,7 @@ SECTIONS
     __exidx_end = .;
 
     __etext = .;
-        
+
     .data : AT (__etext)
     {
         __data_start__ = .;
@@ -131,12 +132,13 @@ SECTIONS
         . = ALIGN(4);
         __bss_end__ = .;
     } > RAM
-    
+
     .heap (COPY):
     {
+        __HeapBase = .;
         __end__ = .;
         PROVIDE(end = .);
-        *(.heap*)
+        KEEP(*(.heap*))
         __HeapLimit = .;
     } > RAM
 
@@ -145,7 +147,7 @@ SECTIONS
      * values to stack symbols later */
     .stack_dummy (COPY):
     {
-        *(.stack*)
+        KEEP(*(.stack*))
     } > RAM
 
     /* Set stack top to end of RAM, and stack limit move down by
@@ -153,8 +155,14 @@ SECTIONS
     __StackTop = ORIGIN(RAM) + LENGTH(RAM);
     __StackLimit = __StackTop - SIZEOF(.stack_dummy);
     PROVIDE(__stack = __StackTop);
-    
+
     /* Check if data + heap + stack exceeds RAM limit */
     ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
+    
+    /* Check if text sections + data exceeds FLASH limit */
+    DataInitFlashUsed = __bss_start__ - __data_start__;
+    CodeFlashUsed = __etext - ORIGIN(FLASH);
+    TotalFlashUsed = CodeFlashUsed + DataInitFlashUsed;
+    ASSERT(TotalFlashUsed <= LENGTH(FLASH), "region FLASH overflowed with .data and user data")
+    
 }
-
diff --git a/nRF5_SDK_11.0.0_89a8197/components/toolchain/gcc/nrf5x_common.ld b/nRF5_SDK_11.0.0_89a8197/components/toolchain/gcc/nrf5x_common.ld
index 69c98f8..2b86799 100644
--- a/nRF5_SDK_11.0.0_89a8197/components/toolchain/gcc/nrf5x_common.ld
+++ b/nRF5_SDK_11.0.0_89a8197/components/toolchain/gcc/nrf5x_common.ld
@@ -21,7 +21,7 @@ OUTPUT_FORMAT ("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
  * with other linker script that defines memory regions FLASH and RAM.
  * It references following symbols, which must be defined in code:
  *   Reset_Handler : Entry of reset handler
- * 
+ *
  * It defines following symbols, which code can use without definition:
  *   __exidx_start
  *   __exidx_end
@@ -38,6 +38,7 @@ OUTPUT_FORMAT ("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
  *   __bss_end__
  *   __end__
  *   end
+ *   __HeapBase
  *   __HeapLimit
  *   __StackLimit
  *   __StackTop
@@ -73,8 +74,8 @@ SECTIONS
 
         KEEP(*(.eh_frame*))
     } > FLASH
-    
-    .ARM.extab : 
+
+    .ARM.extab :
     {
         *(.ARM.extab* .gnu.linkonce.armextab.*)
     } > FLASH
@@ -87,7 +88,7 @@ SECTIONS
     __exidx_end = .;
 
     __etext = .;
-        
+
     .data : AT (__etext)
     {
         __data_start__ = .;
@@ -134,9 +135,10 @@ SECTIONS
     
     .heap (COPY):
     {
+        __HeapBase = .;
         __end__ = .;
         PROVIDE(end = .);
-        *(.heap*)
+        KEEP(*(.heap*))
         __HeapLimit = .;
     } > RAM
 
@@ -145,7 +147,7 @@ SECTIONS
      * values to stack symbols later */
     .stack_dummy (COPY):
     {
-        *(.stack*)
+        KEEP(*(.stack*))
     } > RAM
 
     /* Set stack top to end of RAM, and stack limit move down by
@@ -153,8 +155,14 @@ SECTIONS
     __StackTop = ORIGIN(RAM) + LENGTH(RAM);
     __StackLimit = __StackTop - SIZEOF(.stack_dummy);
     PROVIDE(__stack = __StackTop);
-    
+
     /* Check if data + heap + stack exceeds RAM limit */
     ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")
+    
+    /* Check if text sections + data exceeds FLASH limit */
+    DataInitFlashUsed = __bss_start__ - __data_start__;
+    CodeFlashUsed = __etext - ORIGIN(FLASH);
+    TotalFlashUsed = CodeFlashUsed + DataInitFlashUsed;
+    ASSERT(TotalFlashUsed <= LENGTH(FLASH), "region FLASH overflowed with .data and user data")
+    
 }
-
diff --git a/src/s132_2.0.1.ld b/src/s132_2.0.1.ld
deleted file mode 100644
index f8d0c69..0000000
--- a/src/s132_2.0.1.ld
+++ /dev/null
@@ -1,78 +0,0 @@
-/* Linker script to configure memory regions. */
-
-SEARCH_DIR(.)
-GROUP(-lgcc -lc -lnosys)
-
-MEMORY
-{
-  /** Flash start address for the bootloader. This setting will also be stored in UICR to allow the
-   *  MBR to init the bootloader when starting the system. This value must correspond to 
-   *  BOOTLOADER_REGION_START found in dfu_types.h. The system is prevented from starting up if 
-   *  those values do not match. The check is performed in main.c, see
-   *  APP_ERROR_CHECK_BOOL(*((uint32_t *)NRF_UICR_BOOT_START_ADDRESS) == BOOTLOADER_REGION_START);
-   */
-  FLASH (rx) : ORIGIN = 0x74000, LENGTH = 0xA000 /* 40 KB */
-
-  /** RAM Region for bootloader. This setting is suitable when used with s132. */
-  RAM (rwx) :  ORIGIN = 0x20002C00, LENGTH = 0x5380
-
-  /** Location of non initialized RAM. Non initialized RAM is used for exchanging bond information
-   *  from application to bootloader when using buttonluss DFU OTA. 
-   */
-  NOINIT (rwx) :  ORIGIN = 0x20007F80, LENGTH = 0x80
-
-  /** Location of bootloader setting in flash. */
-  BOOTLOADER_SETTINGS (rw) : ORIGIN = 0x0007F000, LENGTH = 0x1000
-
-  /** Location in UICR where bootloader start address is stored. */
-  UICR_BOOTLOADER (r) : ORIGIN = 0x10001014, LENGTH = 0x04
-  
-  /** Location of mbr params page in flash. */
-  MBR_PARAMS_PAGE (rw) : ORIGIN = 0x0007E000, LENGTH = 0x1000
-  
-  /** Location in UICR where mbr params page address is stored. */
-  UICR_MBR_PARAM_PAGE(r) : ORIGIN = 0x10001018, LENGTH = 0x04
-}
-
-SECTIONS
-{
-  .fs_data_out ALIGN(4):
-  {
-    PROVIDE( __start_fs_data = .);
-    KEEP(*(fs_data))
-    PROVIDE( __stop_fs_data = .);
-  } = 0
-
-  /* Place the bootloader settings page in flash. */
-  .bootloaderSettings(NOLOAD) :
-  {
-    
-  } > BOOTLOADER_SETTINGS
-
-  /* Write the bootloader address in UICR. */
-  .uicrBootStartAddress : 
-  {
-    KEEP(*(.uicrBootStartAddress))
-  } > UICR_BOOTLOADER
-  
-  /* Place the mbr params page in flash. */
-    .mbrParamsPage(NOLOAD) :
-  {
-    
-  } > MBR_PARAMS_PAGE
-  
-  /* Write the bootloader address in UICR. */
-  .uicrMbrParamsPageAddress :
-  {
-    KEEP(*(.uicrMbrParamsPageAddress))
-  } > UICR_MBR_PARAM_PAGE
-
-  /* No init RAM section in bootloader. Used for bond information exchange. */
-  .noinit(NOLOAD) :
-  {
-
-  } > NOINIT
-  /* other placements follow here... */
-}
-
-INCLUDE "nrf52_common.ld"
diff --git a/src/s140_6.0.0.ld b/src/s140_6.0.0.ld
index dce6bff..b23221f 100644
--- a/src/s140_6.0.0.ld
+++ b/src/s140_6.0.0.ld
@@ -11,7 +11,7 @@ MEMORY
    *  those values do not match. The check is performed in main.c, see
    *  APP_ERROR_CHECK_BOOL(*((uint32_t *)NRF_UICR_BOOT_START_ADDRESS) == BOOTLOADER_REGION_START);
    */
-  FLASH (rx) : ORIGIN = 0x74000, LENGTH = 0xA000 /* 40 KB */
+  FLASH (rx) : ORIGIN = 0xF4000, LENGTH = 0xA000 /* 40 KB */
 
   /** RAM Region for bootloader. This setting is suitable when used with s132. */
   RAM (rwx) :  ORIGIN = 0x20003000, LENGTH = 0x4000
@@ -22,13 +22,13 @@ MEMORY
   NOINIT (rwx) :  ORIGIN = 0x20007F80, LENGTH = 0x80
 
   /** Location of bootloader setting in flash. */
-  BOOTLOADER_SETTINGS (rw) : ORIGIN = 0x0007F000, LENGTH = 0x1000
+  BOOTLOADER_SETTINGS (rw) : ORIGIN = 0x000FF000, LENGTH = 0x1000
 
   /** Location in UICR where bootloader start address is stored. */
   UICR_BOOTLOADER (r) : ORIGIN = 0x10001014, LENGTH = 0x04
   
   /** Location of mbr params page in flash. */
-  MBR_PARAMS_PAGE (rw) : ORIGIN = 0x0007E000, LENGTH = 0x1000
+  MBR_PARAMS_PAGE (rw) : ORIGIN = 0x000FE000, LENGTH = 0x1000
   
   /** Location in UICR where mbr params page address is stored. */
   UICR_MBR_PARAM_PAGE(r) : ORIGIN = 0x10001018, LENGTH = 0x04