diff --git a/bootloader/src/main.rs b/bootloader/src/main.rs
index 73d8788..e53767d 100644
--- a/bootloader/src/main.rs
+++ b/bootloader/src/main.rs
@@ -45,14 +45,18 @@ const BOOTLOADER_START_ADDR: u32 = 0x0;
 const BOOTLOADER_CRC_ADDR: u32 = BOOTLOADER_END_ADDR - 4;
 const BOOTLOADER_END_ADDR: u32 = 0x4000;
 
-const APP_A_START_ADDR: u32 = BOOTLOADER_END_ADDR; // 0x4000
-                                                   // The actual size of the image which is relevant for CRC calculation.
+// 0x4000
+const APP_A_START_ADDR: u32 = BOOTLOADER_END_ADDR;
+// The actual size of the image which is relevant for CRC calculation will be store at this
+// address.
 const APP_A_SIZE_ADDR: u32 = APP_B_END_ADDR - 8; // 0x21FF8
 const APP_A_CRC_ADDR: u32 = APP_B_END_ADDR - 4; // 0x21FFC
 pub const APP_A_END_ADDR: u32 = APP_B_END_ADDR - BOOTLOADER_END_ADDR / 2;
 
-const APP_B_START_ADDR: u32 = APP_A_END_ADDR; //  0x22000
-                                              // The actual size of the image which is relevant for CRC calculation.
+//  0x22000
+const APP_B_START_ADDR: u32 = APP_A_END_ADDR;
+// The actual size of the image which is relevant for CRC calculation will be stored at this
+// address.
 const APP_B_SIZE_ADDR: u32 = APP_B_END_ADDR - 8; // 0x3FFF8
 const APP_B_CRC_ADDR: u32 = APP_B_END_ADDR - 4; // 0x3FFFC
 pub const APP_B_END_ADDR: u32 = NVM_SIZE; // 0x40000