diff --git a/src/emu/cpu.rs b/src/emu/cpu.rs
index ee40fc0..b643905 100644
--- a/src/emu/cpu.rs
+++ b/src/emu/cpu.rs
@@ -1,6 +1,6 @@
 use crate::emu::graphics::GraphicsProcessor;
 use crate::emu::memory::{Memory, RamMemory};
-use crate::misc::endian::{read_big_endian_u24, write_big_endian_u24};
+use crate::misc::endian::{read_big_endian_u24};
 use crate::misc::result::EmulatorResult;
 
 
diff --git a/src/emu/memory.rs b/src/emu/memory.rs
index d6ec9ef..3654376 100644
--- a/src/emu/memory.rs
+++ b/src/emu/memory.rs
@@ -1,4 +1,4 @@
-use std::cell::{Ref, RefCell, RefMut};
+use std::cell::{Ref, RefCell};
 
 use crate::misc::error::DeviceType::RAM;
 use crate::misc::error::EmulatorError;
@@ -53,10 +53,6 @@ impl RamMemory {
     pub fn get_data_ref(&self) -> Ref<Box<[u8; MEM_LENGTH]>> {
         self.data.borrow()
     }
-    pub fn get_data_ref_mut(&self) -> RefMut<Box<[u8; MEM_LENGTH]>> {
-        self.data.borrow_mut()
-    }
-
 }
 
 impl Memory for RamMemory {
diff --git a/src/main.rs b/src/main.rs
index f9987e1..6a39d21 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -32,12 +32,12 @@ fn main() -> EmulatorResult<()> {
     let (file_bytes, x) = try_load_rom(&file_name)?;
     assert!(x < MEM_LENGTH);
 
-    let (mut canvas, mut event_pump, mut audio_queue) = initiate_sdl();
+    let (mut canvas, mut event_pump, audio_queue) = initiate_sdl();
 
 
     let ram = RamMemory::try_from(file_bytes.as_slice())?;
     let graphics_processor = GraphicsProcessor::try_new(&ram)?;
-    let mut audio_processor = AudioProcessor::try_new(&ram,&audio_queue)?;
+    let mut audio_processor = AudioProcessor::try_new(&ram, &audio_queue)?;
     let mut keyboard = Keyboard::new(&ram);
     let cpu = Cpu::new(&ram, &graphics_processor);
 
@@ -109,10 +109,10 @@ fn get_key_index(p0: Keycode) -> Option<u8> {
 fn try_load_rom(file_name_option: &Option<String>) -> EmulatorResult<(Vec<u8>, usize)> {
     let mut file_bytes = vec![0u8; MEM_LENGTH];
 
-    let bytes_read = if let Some(file_name) = file_name_option{
+    let bytes_read = if let Some(file_name) = file_name_option {
         let mut file_handle = File::open(file_name.as_str())?;
         file_handle.read(&mut file_bytes)?
-    }else{
+    } else {
         0
     };
 
@@ -126,12 +126,12 @@ fn initiate_sdl() -> (WindowCanvas, EventPump, AudioQueue<u8>) {
     let sdl_context = sdl2::init().unwrap();
     let video_subsystem = sdl_context.video().unwrap();
     let audio_subsystem = sdl_context.audio().unwrap();
-    let wanted_spec = AudioSpecDesired{
+    let wanted_spec = AudioSpecDesired {
         channels: Some(1),
         samples: Some(256),
         freq: Some(15360),
     };
-    let audio_queue = audio_subsystem.open_queue::<u8,_>(None, &wanted_spec).unwrap();
+    let audio_queue = audio_subsystem.open_queue::<u8, _>(None, &wanted_spec).unwrap();
     audio_queue.resume();
 
 
diff --git a/src/misc/endian.rs b/src/misc/endian.rs
index 327283c..324b936 100644
--- a/src/misc/endian.rs
+++ b/src/misc/endian.rs
@@ -7,10 +7,6 @@ pub fn read_big_endian_u24(input: &[u8; 3]) -> u32 {
 pub fn read_big_endian_u16(input: &[u8; 2]) -> u16 {
     BigEndian::read_u16(input)
 }
-/// Write 24-bit endian number into slice
-pub fn write_big_endian_u24(input: u32, output_slice: &mut [u8; 3]) {
-    BigEndian::write_u24(output_slice, input);
-}
 
 pub fn write_big_endian_u16(input: u16, output_slice: &mut [u8; 2]) {
     BigEndian::write_u16(output_slice, input);