diff --git a/Cargo.lock b/Cargo.lock
index 0942501..f8df113 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -236,6 +236,8 @@ name = "assembler"
 version = "0.2.0"
 dependencies = [
  "common",
+ "num_cpus",
+ "threadpool",
 ]
 
 [[package]]
@@ -1951,6 +1953,16 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "num_cpus"
+version = "1.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91df4bbde75afed763b708b7eee1e8e7651e02d97f6d5dd763e89367e957b23b"
+dependencies = [
+ "hermit-abi",
+ "libc",
+]
+
 [[package]]
 name = "num_enum"
 version = "0.7.3"
@@ -3041,6 +3053,15 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "threadpool"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d050e60b33d41c19108b32cea32164033a9013fe3b46cbd4457559bfbf77afaa"
+dependencies = [
+ "num_cpus",
+]
+
 [[package]]
 name = "tiff"
 version = "0.9.1"
diff --git a/assembler/Cargo.toml b/assembler/Cargo.toml
index d920624..676d37d 100644
--- a/assembler/Cargo.toml
+++ b/assembler/Cargo.toml
@@ -13,4 +13,6 @@ name = "assembler"
 path = "src/lib.rs"
 
 [dependencies]
-common = { path = "../common" }
\ No newline at end of file
+common = { path = "../common" }
+num_cpus = "1.17.0"
+threadpool = "1.8.1"
diff --git a/assembler/src/assembler/macros.rs b/assembler/src/assembler/macros.rs
new file mode 100644
index 0000000..32e5974
--- /dev/null
+++ b/assembler/src/assembler/macros.rs
@@ -0,0 +1,131 @@
+//! Macros used throughout the assembler
+
+use crate::assembler::model::{Node, Opcode, Symbol, Token};
+
+/// Parse DSA assembly code with optional formatting
+///
+/// # Examples
+/// ```
+/// // With formatting:
+/// let nodes = dsa!(hash, "mov r1, {}", 42)?;
+///
+/// // Without formatting:
+/// let nodes = dsa!(hash, "mov r1, 42")?;
+/// ```
+#[macro_export]
+macro_rules! dsa {
+    // Version with formatting arguments
+    ($hash:expr, $input:expr, $($args:expr),+) => {{
+        let input = format!($input, $($args),+);
+        let tokens = $crate::lexer::lexer(input, $hash)?;
+        let parsed = $crate::parser::Parser::parse_nodes(tokens)?;
+        parsed
+    }};
+    // Version without formatting
+    ($hash:expr, $input:expr) => {{
+        let input = String::from($input);
+        let tokens = $crate::lexer::lexer(input, $hash)?;
+        let parsed = $crate::parser::Parser::parse_nodes(tokens)?;
+        parsed
+    }};
+}
+
+/// Creates a new Node with the given symbol, opcode, and tokens
+#[macro_export]
+macro_rules! node {
+    ($symbol: expr, $opcode: expr, args: $tokens: expr) => {
+        $crate::assembler::model::Node::new($symbol.clone(), $opcode.clone(), $tokens.clone())
+    };
+
+    ($symbol: expr, $opcode: expr, $($tokens: expr),+) => {
+        $crate::assembler::model::Node::new(
+            $symbol.clone(),
+            $opcode.clone(),
+            vec![$(node!(@convert_token $tokens)),+]
+        )
+    };
+
+    (@convert_token $token: literal) => {
+        $crate::assembler::model::Token::Immediate($token)
+    };
+
+    (@convert_token $token: expr) => {
+        $token.clone()
+    };
+}
+
+/// Extracts a specific token type from a token
+#[macro_export]
+macro_rules! expect_token {
+    ($token:expr, Symbol) => {
+        match $token {
+            $crate::assembler::model::Token::Symbol(value) => Ok(value.clone()),
+            other => Err($crate::assembler::AssembleError::UnexpectedToken(
+                other.clone(),
+                $crate::assembler::model::TokenType::Symbol,
+            )),
+        }
+    };
+    ($token:expr, Register) => {
+        match $token {
+            $crate::assembler::model::Token::Register(value) => Ok(value.clone()),
+            other => Err($crate::assembler::AssembleError::UnexpectedToken(
+                other.clone(),
+                $crate::assembler::model::TokenType::Register,
+            )),
+        }
+    };
+    ($token:expr, Immediate) => {
+        match $token {
+            $crate::assembler::model::Token::Immediate(value) => Ok(value.clone()),
+            other => Err($crate::assembler::AssembleError::UnexpectedToken(
+                other.clone(),
+                $crate::assembler::model::TokenType::Immediate,
+            )),
+        }
+    };
+    ($token:expr, StringLit) => {
+        match $token {
+            $crate::assembler::model::Token::StringLit(value) => Ok(value.clone()),
+            other => Err($crate::assembler::AssembleError::UnexpectedToken(
+                other.clone(),
+                $crate::assembler::model::TokenType::StringLit,
+            )),
+        }
+    };
+    ($token:expr, Opcode) => {
+        match $token {
+            $crate::assembler::model::Token::Opcode(value) => Ok(value.clone()),
+            other => Err($crate::assembler::AssembleError::UnexpectedToken(
+                other.clone(),
+                $crate::assembler::model::TokenType::Opcode,
+            )),
+        }
+    };
+}
+
+/// Checks if a token matches any of the specified types
+#[macro_export]
+macro_rules! expect_type {
+    ($token:expr, $($variant:ident),+) => {{
+        let token = $token;
+        match &token {
+            $(
+                $crate::assembler::model::Token::$variant(_) => Ok(token.clone()),
+            )+
+            other => {
+                let expected_type = expect_type!(@get_first_type $($variant),+);
+                Err($crate::assembler::AssembleError::UnexpectedToken(
+                    other.clone().clone(),
+                    expected_type,
+                ))
+            }
+        }
+    }};
+
+    (@get_first_type Symbol $(, $rest:ident)*) => { $crate::assembler::model::TokenType::Symbol };
+    (@get_first_type Register $(, $rest:ident)*) => { $crate::assembler::model::TokenType::Register };
+    (@get_first_type Immediate $(, $rest:ident)*) => { $crate::assembler::model::TokenType::Immediate };
+    (@get_first_type StringLit $(, $rest:ident)*) => { $crate::assembler::model::TokenType::StringLit };
+    (@get_first_type Opcode $(, $rest:ident)*) => { $crate::assembler::model::TokenType::Opcode };
+}
diff --git a/assembler/src/assembler/mod.rs b/assembler/src/assembler/mod.rs
index fbb38c6..16c934c 100644
--- a/assembler/src/assembler/mod.rs
+++ b/assembler/src/assembler/mod.rs
@@ -1,21 +1,23 @@
+#![allow(dead_code, unused)]
+
 use std::{
     collections::HashSet,
     fmt, fs,
     hash::{DefaultHasher, Hash, Hasher},
     path::{Path, PathBuf},
+    sync::mpsc,
 };
 
 use common::prelude::Instruction;
 
-use crate::{
-    assembler::{
-        expand::expand_pseudo_ops,
-        model::{Node, Opcode, Symbol, Token, TokenType},
-        parser::{Parser, Program},
-        resolver::{create_sections, resolve_dependencies, resolve_symbols},
-    },
-    codegen, log, node,
-};
+// TODO: Use an actual logging or tracing library for pretty (scoped) output.
+fn log(message: &str) {
+    println!("\x1b[32mINFO:\x1b[0m {message}");
+}
+
+// Module declarations
+#[macro_use]
+pub mod macros;
 
 pub mod codegen;
 pub mod expand;
@@ -24,25 +26,91 @@ pub mod model;
 pub mod parser;
 pub mod resolver;
 
-pub fn assemble(src: &Path) -> Result<Vec<Instruction>, AssembleError> {
-    let mut modules = HashSet::<u64>::new();
-    let mut program = Program::new();
+// Re-exports
+pub use self::{
+    codegen::codegen,
+    expand::expand_pseudo_ops,
+    lexer::lexer,
+    model::{Module, Node, Opcode, Symbol, Token, TokenType},
+    parser::{Parser, Program},
+    resolver::{create_sections, resolve_dependencies, resolve_symbols},
+};
 
-    let hash = quick_hash(src);
-    modules.insert(hash);
+use crate::util::logging::{Entry, Logger};
 
-    prepare_dependency(src, &mut modules, &mut program)?;
-    let mut nodes = program.nodes;
+pub struct CompilerEngine {
+    modules: HashSet<u64>,
+    program: Program,
+    logger: Option<Logger>,
+    receiver: Option<mpsc::Receiver<Entry>>,
+    result: Option<Result<Vec<Instruction>, AssembleError>>,
+}
 
-    create_sections(&mut nodes)?;
-    resolve_symbols(&mut nodes)?;
-
-    let instructions = codegen(nodes)?;
-    for inst in instructions.iter() {
-        println!("{inst}");
+impl CompilerEngine {
+    pub fn new() -> CompilerEngine {
+        let (tx, rx) = mpsc::channel::<Entry>();
+        CompilerEngine {
+            program: Program::new(),
+            modules: HashSet::new(),
+            logger: Some(Logger::new(tx)),
+            receiver: Some(rx),
+            result: None,
+        }
     }
 
-    Ok(instructions)
+    pub fn get_log() -> Option<Entry> {
+        None
+    }
+
+    pub fn get_logs() -> Vec<Entry> {
+        vec![]
+    }
+
+    pub fn is_ready(&self) -> bool {
+        self.result.is_some()
+    }
+
+    pub fn result(&self) -> Option<Result<Vec<Instruction>, AssembleError>> {
+        self.result.clone()
+    }
+
+    pub fn assemble(&mut self, src: &Path) -> Result<(), AssembleError> {
+        let hash = quick_hash(src);
+
+        if self.modules.contains(&hash) {
+            return Ok(());
+        }
+
+        prepare_dependency(src, &mut self.modules, &mut self.program)?;
+
+        self.result = Some(self.build());
+
+        Ok(())
+    }
+
+    fn load_module(&mut self, path: &Path) -> Result<(), AssembleError> {
+        Ok(())
+    }
+
+    fn build(&self) -> Result<Vec<Instruction>, AssembleError> {
+        let mut nodes = self.program.nodes.clone();
+
+        create_sections(&mut nodes)?;
+        resolve_symbols(&mut nodes)?;
+
+        let instructions = codegen(nodes)?;
+        for inst in instructions.iter() {
+            println!("{inst}");
+        }
+
+        Ok(instructions)
+    }
+}
+
+impl Default for CompilerEngine {
+    fn default() -> Self {
+        Self::new()
+    }
 }
 
 fn prepare_dependency(
@@ -71,9 +139,13 @@ fn prepare_dependency(
     let parsed = Parser::parse_nodes(tokens)?;
 
     log(&format!("{:20} {:20}", "Resolving Deps", filename));
-    let nodes = resolve_dependencies(parsed)?;
+    // Get the parent directory of the source file to use as the base directory
+    let base_dir = path
+        .parent()
+        .ok_or_else(|| AssembleError::InvalidFile(path.to_path_buf()))?;
+    let nodes = resolve_dependencies(parsed, base_dir)?;
 
-    let deps = Parser::get_dependencies(&nodes)?;
+    let deps = Parser::get_dependencies(&nodes, path)?;
 
     log(&format!(
         "{:20} {:20}",
@@ -122,7 +194,7 @@ pub fn disassemble(_: Vec<Instruction>) -> String {
     todo!()
 }
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub enum AssembleError {
     Generic,
     UnexpectedEof,
@@ -154,95 +226,3 @@ fn quick_hash(value: &Path) -> u64 {
     value.canonicalize().unwrap().to_str().hash(&mut hasher);
     hasher.finish()
 }
-
-#[macro_export]
-macro_rules! dsa {
-    // Version with formatting arguments
-    ($hash:expr, $input:expr, $($args:expr),+) => {{
-        let input = format!($input, $($args),+);
-        let tokens = $crate::lexer::lexer(input, $hash)?;
-        let parsed = $crate::parser::Parser::parse_nodes(tokens)?;
-        parsed
-    }};
-    // Version without formatting
-    ($hash:expr, $input:expr) => {{
-        let input = String::from($input);
-        let tokens = $crate::lexer::lexer(input, $hash)?;
-        let parsed = $crate::parser::Parser::parse_nodes(tokens)?;
-        parsed
-    }};
-}
-
-#[macro_export]
-macro_rules! expect_token {
-    ($token:expr, Symbol) => {
-        match $token {
-            $crate::assembler::model::Token::Symbol(value) => Ok(value.clone()),
-            other => Err($crate::assembler::AssembleError::UnexpectedToken(
-                other.clone(),
-                $crate::assembler::model::TokenType::Symbol,
-            )),
-        }
-    };
-    ($token:expr, Register) => {
-        match $token {
-            $crate::assembler::model::Token::Register(value) => Ok(value.clone()),
-            other => Err($crate::assembler::AssembleError::UnexpectedToken(
-                other.clone(),
-                $crate::assembler::model::TokenType::Register,
-            )),
-        }
-    };
-    ($token:expr, Immediate) => {
-        match $token {
-            $crate::assembler::model::Token::Immediate(value) => Ok(value.clone()),
-            other => Err($crate::assembler::AssembleError::UnexpectedToken(
-                other.clone(),
-                $crate::assembler::model::TokenType::Immediate,
-            )),
-        }
-    };
-    ($token:expr, StringLit) => {
-        match $token {
-            $crate::assembler::model::Token::StringLit(value) => Ok(value.clone()),
-            other => Err($crate::assembler::AssembleError::UnexpectedToken(
-                other.clone(),
-                $crate::assembler::model::TokenType::StringLit,
-            )),
-        }
-    };
-    ($token:expr, Opcode) => {
-        match $token {
-            $crate::assembler::model::Token::Opcode(value) => Ok(value.clone()),
-            other => Err($crate::assembler::AssembleError::UnexpectedToken(
-                other.clone(),
-                $crate::assembler::model::TokenType::Opcode,
-            )),
-        }
-    };
-}
-
-#[macro_export]
-macro_rules! expect_type {
-    ($token:expr, $($variant:ident),+) => {{
-        let token = $token;
-        match &token {
-            $(
-                $crate::assembler::model::Token::$variant(_) => Ok(token.clone()),
-            )+
-            other => {
-                let expected_type = expect_type!(@get_first_type $($variant),+);
-                Err($crate::assembler::AssembleError::UnexpectedToken(
-                    other.clone().clone(),
-                    expected_type,
-                ))
-            }
-        }
-    }};
-
-    (@get_first_type Symbol $(, $rest:ident)*) => { $crate::assembler::model::TokenType::Symbol };
-    (@get_first_type Register $(, $rest:ident)*) => { $crate::assembler::model::TokenType::Register };
-    (@get_first_type Immediate $(, $rest:ident)*) => { $crate::assembler::model::TokenType::Immediate };
-    (@get_first_type StringLit $(, $rest:ident)*) => { $crate::assembler::model::TokenType::StringLit };
-    (@get_first_type Opcode $(, $rest:ident)*) => { $crate::assembler::model::TokenType::Opcode };
-}
diff --git a/assembler/src/assembler/model.rs b/assembler/src/assembler/model.rs
index 955c5ac..28c37a2 100644
--- a/assembler/src/assembler/model.rs
+++ b/assembler/src/assembler/model.rs
@@ -11,29 +11,6 @@ pub struct Node {
     pub tokens: Vec<Token>,
 }
 
-#[macro_export]
-macro_rules! node {
-    ($symbol: expr, $opcode: expr, args: $tokens: expr) => {
-        Node::new($symbol.clone(), $opcode.clone(), $tokens.clone())
-    };
-
-    ($symbol: expr, $opcode: expr, $($tokens: expr),+) => {
-        Node::new(
-            $symbol.clone(),
-            $opcode.clone(),
-            vec![$(node!(@convert_token $tokens)),+]
-        )
-    };
-
-    (@convert_token $token: literal) => {
-        Token::Immediate($token)
-    };
-
-    (@convert_token $token: expr) => {
-        $token.clone()
-    };
-}
-
 impl Node {
     pub fn new(symbol: Option<Symbol>, opcode: Opcode, tokens: Vec<Token>) -> Node {
         Node {
diff --git a/assembler/src/assembler/parser.rs b/assembler/src/assembler/parser.rs
index 1861b42..73c23fa 100644
--- a/assembler/src/assembler/parser.rs
+++ b/assembler/src/assembler/parser.rs
@@ -1,4 +1,4 @@
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 
 use crate::{assembler::AssembleError, expect_token, expect_type, node};
 
@@ -10,6 +10,7 @@ pub struct Parser {
     nodes: Vec<Node>,
 }
 
+#[derive(Debug)]
 pub struct Program {
     pub nodes: Vec<Node>,
 }
@@ -44,8 +45,6 @@ impl Parser {
             nodes: vec![],
         };
 
-        println!("{:#?}", tokens);
-
         while !self_.tokens.is_empty() {
             let ins = self_.parse_instruction()?;
             self_.nodes.push(ins);
@@ -54,12 +53,29 @@ impl Parser {
         Ok(self_.nodes.clone())
     }
 
-    pub fn get_dependencies(nodes: &Vec<Node>) -> Result<Vec<PathBuf>, AssembleError> {
+    pub fn get_dependencies(
+        nodes: &Vec<Node>,
+        source_path: &Path,
+    ) -> Result<Vec<PathBuf>, AssembleError> {
         let mut dependencies = Vec::new();
+        // Get the parent directory of the source file to use as the base directory
+        let base_dir = source_path
+            .parent()
+            .ok_or_else(|| AssembleError::InvalidFile(source_path.to_path_buf()))?;
+
         for node in nodes {
             if let Opcode::Include = node.opcode() {
-                let path = expect_token!(node.args().get(1).unwrap(), StringLit)?;
-                dependencies.push(PathBuf::from(path));
+                let path_str = expect_token!(node.args().get(1).unwrap(), StringLit)?;
+                let path = PathBuf::from(path_str);
+
+                // If the path is not absolute, make it relative to the base directory
+                let full_path = if path.is_absolute() {
+                    path
+                } else {
+                    base_dir.join(path)
+                };
+
+                dependencies.push(full_path);
             }
         }
         Ok(dependencies)
diff --git a/assembler/src/assembler/resolver.rs b/assembler/src/assembler/resolver.rs
index 6dea158..cb6d602 100644
--- a/assembler/src/assembler/resolver.rs
+++ b/assembler/src/assembler/resolver.rs
@@ -1,9 +1,16 @@
-use std::{collections::HashMap, path::PathBuf};
+use std::{
+    collections::HashMap,
+    fs::canonicalize,
+    path::{Path, PathBuf},
+};
 
 use common::prelude::Register;
 
-use crate::assembler::model::{Module, Node, Opcode, Symbol, Token};
 use crate::assembler::quick_hash;
+use crate::assembler::{
+    log,
+    model::{Module, Node, Opcode, Symbol, Token},
+};
 use crate::{assembler::AssembleError, node};
 
 pub fn resolve_symbols(nodes: &mut [Node]) -> Result<(), AssembleError> {
@@ -63,7 +70,10 @@ fn generate_symbol_table(nodes: &[Node]) -> Result<HashMap<Symbol, u32>, Assembl
     Ok(table)
 }
 
-pub fn resolve_dependencies(mut nodes: Vec<Node>) -> Result<Vec<Node>, AssembleError> {
+pub fn resolve_dependencies(
+    mut nodes: Vec<Node>,
+    base_dir: &Path,
+) -> Result<Vec<Node>, AssembleError> {
     // First we get a list of imports.
     let mut dependencies = Vec::new();
     for node in &nodes {
@@ -79,11 +89,13 @@ pub fn resolve_dependencies(mut nodes: Vec<Node>) -> Result<Vec<Node>, AssembleE
             } else {
                 unreachable!()
             };
-            let hash = quick_hash(
-                &PathBuf::from(path)
-                    .canonicalize()
-                    .expect("ERROR: Invalid import path."),
-            );
+
+            let full_path = base_dir.join(path);
+            let canonical_path = full_path
+                .canonicalize()
+                .map_err(|_| AssembleError::InvalidFile(full_path.to_path_buf()))?;
+
+            let hash = quick_hash(&canonical_path);
 
             dependencies.push((name, hash));
         }
diff --git a/assembler/src/lib.rs b/assembler/src/lib.rs
index 8f6ae20..45d7389 100644
--- a/assembler/src/lib.rs
+++ b/assembler/src/lib.rs
@@ -1,15 +1,8 @@
-use assembler::codegen::codegen;
-
 pub mod assembler;
 pub mod tooling;
 mod util;
 
 pub mod prelude {
-    pub use crate::assembler::assemble;
+    pub use crate::assembler::CompilerEngine;
     pub use crate::assembler::disassemble;
 }
-
-// TODO: Use an actual logging or tracing library for pretty (scoped) output.
-fn log(message: &str) {
-    println!("\x1b[32mINFO:\x1b[0m {message}");
-}
diff --git a/assembler/src/main.rs b/assembler/src/main.rs
index 3ce7bcc..0d4f523 100644
--- a/assembler/src/main.rs
+++ b/assembler/src/main.rs
@@ -1,7 +1,8 @@
+use assembler::prelude::*;
 use std::{fs, io::Write, path::PathBuf};
 
 fn main() {
-    // parse args:
+    // Parse command line arguments
     let args: Vec<String> = std::env::args().collect();
 
     if args.len() == 2 && args[1] == "init" {
@@ -10,23 +11,49 @@ fn main() {
     }
 
     if args.len() != 5 || args[1] != "-i" || args[3] != "-o" {
-        eprintln!("Usage: binary_name -i input_path -o output_path");
+        eprintln!("Usage: {} -i input_path -o output_path", args[0]);
         std::process::exit(1);
     }
+
     let input_path = &args[2];
     let output_path = &args[4];
-
     let src = PathBuf::from(input_path);
-    let mut output_file = fs::File::create(output_path).unwrap();
 
-    match assembler::assembler::assemble(&src) {
-        Ok(res) => {
-            res.iter().map(|i| i.encode()).for_each(|i| {
-                output_file.write_all(&i.to_le_bytes()).unwrap();
-            });
-        }
+    // Create the output file
+    let mut output_file = match fs::File::create(output_path) {
+        Ok(file) => file,
         Err(e) => {
-            eprintln!("{e}");
+            eprintln!("Failed to create output file: {}", e);
+            std::process::exit(1);
+        }
+    };
+
+    // Initialize the compiler engine
+    let mut engine = CompilerEngine::new();
+
+    // Assemble the source file
+    if let Err(e) = engine.assemble(&src) {
+        eprintln!("Assembly error: {}", e);
+        std::process::exit(1);
+    }
+
+    // Build and write the output
+    match engine.result() {
+        Some(Ok(instructions)) => {
+            for instruction in instructions {
+                if let Err(e) = output_file.write_all(&instruction.encode().to_le_bytes())
+                {
+                    eprintln!("Failed to write to output file: {}", e);
+                    std::process::exit(1);
+                }
+            }
+        }
+        Some(Err(e)) => {
+            eprintln!("Build error: {}", e);
+            std::process::exit(1);
+        }
+        None => {
+            eprintln!("Build error: No result available");
             std::process::exit(1);
         }
     }
diff --git a/assembler/src/util/logging.rs b/assembler/src/util/logging.rs
new file mode 100644
index 0000000..ab6645a
--- /dev/null
+++ b/assembler/src/util/logging.rs
@@ -0,0 +1,94 @@
+use std::{fmt, sync::mpsc::Sender};
+
+#[allow(dead_code)]
+#[derive(Debug)]
+pub struct Logger {
+    pub sender: Sender<Entry>,
+}
+
+impl Logger {
+    pub fn new(sender: Sender<Entry>) -> Self {
+        Self { sender }
+    }
+
+    pub fn debug<T: fmt::Display>(&self, message: T) {
+        self.sender
+            .send(Entry {
+                etype: EntryType::Debug,
+                message: message.to_string(),
+            })
+            .unwrap();
+    }
+
+    pub fn info<T: fmt::Display>(&self, message: T) {
+        self.sender
+            .send(Entry {
+                etype: EntryType::Info,
+                message: message.to_string(),
+            })
+            .unwrap();
+    }
+
+    pub fn warn<T: fmt::Display>(&self, message: T) {
+        self.sender
+            .send(Entry {
+                etype: EntryType::Warn,
+                message: message.to_string(),
+            })
+            .unwrap();
+    }
+
+    pub fn error<T: fmt::Display>(&self, message: T) {
+        self.sender
+            .send(Entry {
+                etype: EntryType::Error,
+                message: message.to_string(),
+            })
+            .unwrap();
+    }
+
+    pub fn fatal<T: fmt::Display>(&self, message: T) {
+        self.sender
+            .send(Entry {
+                etype: EntryType::Fatal,
+                message: message.to_string(),
+            })
+            .unwrap();
+    }
+}
+
+pub struct Entry {
+    etype: EntryType,
+    pub message: String,
+}
+
+#[derive(Copy, Clone, Eq, PartialEq)]
+enum EntryType {
+    Debug,
+    Info,
+    Warn,
+    Error,
+    Fatal,
+}
+
+impl fmt::Display for EntryType {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "{:<5}",
+            match self {
+                EntryType::Debug => "DEBUG",
+                EntryType::Info => "INFO",
+                EntryType::Warn => "WARN",
+                EntryType::Error => "ERROR",
+                EntryType::Fatal => "FATAL",
+            }
+        )
+    }
+}
+
+impl fmt::Display for Entry {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}: {}", self.etype, self.message)
+    }
+}
diff --git a/assembler/src/util/mod.rs b/assembler/src/util/mod.rs
index 5328c05..ea56139 100644
--- a/assembler/src/util/mod.rs
+++ b/assembler/src/util/mod.rs
@@ -1,3 +1,5 @@
+pub mod logging;
+
 use std::io::Write;
 
 pub fn input(prompt: &str) -> String {
diff --git a/emulator/src/emulator/ui/editor.rs b/emulator/src/emulator/ui/editor.rs
index b974d59..98cc1c2 100644
--- a/emulator/src/emulator/ui/editor.rs
+++ b/emulator/src/emulator/ui/editor.rs
@@ -346,12 +346,24 @@ impl Editor {
             // builds the current file
             if ui.button("Build").clicked() && !self.unsaved {
                 if let Some(path) = &self.path {
-                    let instructions = match assemble(path) {
-                        Ok(instructions) => instructions,
-                        Err(error) => {
+                    let mut assembler = CompilerEngine::new();
+                    if let Err(error) = assembler.assemble(path) {
+                        self.error = Some(format!("Failed to assemble: {error:?}"));
+                        return;
+                    }
+
+                    let instructions = match assembler.result() {
+                        Some(Ok(instructions)) => instructions,
+                        Some(Err(error)) => {
                             self.error = Some(format!("Failed to assemble: {error:?}"));
                             return;
                         }
+                        None => {
+                            self.error = Some(
+                                "Failed to assemble: No result available".to_string(),
+                            );
+                            return;
+                        }
                     };
 
                     self.output = instructions
diff --git a/resources/dsa/fib.dsa b/resources/dsa/lib/fib.dsa
similarity index 100%
rename from resources/dsa/fib.dsa
rename to resources/dsa/lib/fib.dsa
diff --git a/resources/dsa/multiply.dsa b/resources/dsa/lib/multiply.dsa
similarity index 100%
rename from resources/dsa/multiply.dsa
rename to resources/dsa/lib/multiply.dsa
diff --git a/resources/dsa/print.dsa b/resources/dsa/lib/print.dsa
similarity index 100%
rename from resources/dsa/print.dsa
rename to resources/dsa/lib/print.dsa
diff --git a/resources/dsa/test.dsa b/resources/dsa/test.dsa
index aa1400a..8faa776 100644
--- a/resources/dsa/test.dsa
+++ b/resources/dsa/test.dsa
@@ -1,11 +1,7 @@
-include print "./print.dsa"
+include print "./lib/print.dsa"
 
 dw stack: 0x10000
-db string: "An idiot admires complexity, a genius admires simplicity, 
-a physicist tries to make it simple, for an idiot anything the more complicated it is,
-the more he will admire it, if you make something so clusterfucked he can't understand it he's 
-gonna think you're a god cause you made it so complicated nobody can understand it. 
-That's how they write journals in Academics, they try to make it so complicated people think you're a genius"
+db string: "Hello world frfrfr"
 
 init:
 	// set up a stack.
diff --git a/resources/dsb/test.dsb b/resources/dsb/test.dsb
index c284fe1..67d1c7f 100644
Binary files a/resources/dsb/test.dsb and b/resources/dsb/test.dsb differ