diff --git a/src/simulator/mem_cmp.rs b/src/simulator/mem_cmp.rs
index 07f48b6..099d96f 100644
--- a/src/simulator/mem_cmp.rs
+++ b/src/simulator/mem_cmp.rs
@@ -14,7 +14,7 @@ use std::{fs, io::{BufRead, BufReader, Lines, Error}};
 use crate::Machine;
 
 /// File section
-pub struct SectionFormat{
+pub struct SectionFormat {
     /// Memory address of the section
     addr: String,
     /// The size of data in bytes
@@ -26,7 +26,7 @@ pub struct SectionFormat{
 /// # Memory section
 /// 
 /// Representation of a section of memory from BurritOS or NachOS
-pub struct Section{
+pub struct Section {
     /// Memory address of the section
     addr: usize,
     /// The size of data in bytes
@@ -36,15 +36,23 @@ pub struct Section{
 }
 
 impl Section {
-
     /// Creates a memory section from a SectionFormat
-    fn from(section: &SectionFormat) -> Section {
+    fn from(section: &mut SectionFormat) -> Section {
         let addr = usize::from_str_radix(&section.addr, 16).unwrap_or_default();
         let len = usize::from_str_radix(&section.len, 16).unwrap_or_default();
-        let content: Vec<u8> = section.content.as_bytes().chunks(2).map(|x| {
-            u8::from_str_radix(std::str::from_utf8(x).unwrap_or_default(), 16).unwrap_or_default()
-        }).collect();
-        Section{addr, len, content}
+        let content: Vec<u8>;
+        unsafe {
+            content = section.content.as_bytes_mut()
+                .chunks_mut(4).map(
+                    |x| {
+                        x.reverse();
+                        u8::from_str_radix(
+                            std::str::from_utf8(x).unwrap_or_default(), 16
+                        ).unwrap_or_default()
+                    }
+                ).collect();
+        }
+        Section { addr, len, content }
     }
 
     /// Pretty prints a memory section
@@ -68,7 +76,7 @@ pub struct MemChecker {
 }
 
 
-impl MemChecker{
+impl MemChecker {
 
     ///Translate lines of a file in e Vector of String
     ///We need this method to parse the memory we received
@@ -126,12 +134,12 @@ impl MemChecker{
             }
             else {
                 //lecture ligne CONTENT
-                let section_f = SectionFormat{
+                let mut section_f = SectionFormat {
                     addr: tmp_addr_str.clone(),
                     len: tmp_len_str.clone(),
                     content: current_line.clone().replace(' ', ""),
                 };
-                sections.push(Section::from(&section_f));
+                sections.push(Section::from(&mut section_f));
             }
 
         }
@@ -169,7 +177,7 @@ impl MemChecker{
         machine.pc = m_c.pc as u64;
 
         for section in m_c.sections.iter() {
-            for (i,b) in section.content.iter().enumerate() {
+            for (i, b) in section.content.iter().enumerate() {
                 machine.main_memory[section.addr + i] = *b;
             }
         }
@@ -235,12 +243,12 @@ mod tests {
 
     #[test]
     fn test_create_section_content(){
-        let section_format = SectionFormat{
+        let mut section_format = SectionFormat{
             addr: "0".to_string(),
             len: "0".to_string(),
             content: "00FF0AA0A5".to_string(),
         };
-        let section = Section::from(&section_format);
+        let section = Section::from(&mut section_format);
         let expected_vec:  Vec<u8> = vec![0u8, 255u8, 10u8, 160u8, 165u8];
         assert_eq!(section.content, expected_vec);
     }
diff --git a/src/utility/cfg.rs b/src/utility/cfg.rs
index b2c671d..87acfc4 100644
--- a/src/utility/cfg.rs
+++ b/src/utility/cfg.rs
@@ -93,25 +93,29 @@ pub fn read_settings() -> Result<Settings, Error> {
 }
 
 /// Returns a mock configuration for Machine unit testing
+/// 
 /// FIXME: Does not cover the whole configuration yet
 pub fn get_debug_configuration() -> Settings {
     let mut settings_map = Settings::new();
-    settings_map.insert(MachineSettingKey::PageSize, 128);
-    settings_map.insert(MachineSettingKey::NumPhysPages, 400);
+    settings_map.insert(MachineSettingKey::PageSize, 2048);
+    settings_map.insert(MachineSettingKey::NumPhysPages, 8192);
     settings_map.insert(MachineSettingKey::UserStackSize, 4096);
     settings_map
 }
 
+/// Removes comments and empty lines
 fn filter_garbage<R: std::io::Read>(reader: BufReader<R>) -> Vec<String> {
     reader.lines()
         .map(|l| l.unwrap())
-        .filter(|l| !l.is_empty() && !l.starts_with("#"))
+        .filter(|l| !l.is_empty() && !l.starts_with('#'))
         .collect()
 }
 
+
+/// Inserts user settings into setting map
 fn update_settings_map(mut settings_map: Settings, key: &str, setting: &str) -> Settings {
     let key = MachineSettingKey::from(key);
-    let setting = u64::from_str_radix(setting, 10).unwrap_or(0);
+    let setting = setting.parse::<u64>().unwrap_or(0);
     settings_map.insert(key, setting);
     settings_map
 }
\ No newline at end of file