diff --git a/common/src/instructions.rs b/common/src/instructions.rs
index b27675d..952033c 100644
--- a/common/src/instructions.rs
+++ b/common/src/instructions.rs
@@ -18,7 +18,8 @@ impl Interrupt {
 // TODO: This should be TryFrom.
 impl From<u8> for Interrupt {
     #[allow(unreachable_code)]
-    fn from(_code: u8) -> Self {
+    fn from(code: u8) -> Self {
+        return Self::Software(code);
         todo!("Implement this once a hardware interrupt convention is established.");
 
         // Self::Software(_code)
diff --git a/emulator/src/emulator/system/processor/mod.rs b/emulator/src/emulator/system/processor/mod.rs
index 85602b1..ecdbf54 100644
--- a/emulator/src/emulator/system/processor/mod.rs
+++ b/emulator/src/emulator/system/processor/mod.rs
@@ -17,6 +17,8 @@ pub struct Processor {
     pub registers: RegFile,
     pub halted: bool,
     pub io_devices: Vec<Arc<dyn IODevice>>,
+
+    pub dustbin: u32,
 }
 
 #[allow(clippy::needless_pass_by_ref_mut)]
@@ -28,6 +30,7 @@ impl Processor {
             registers: RegFile::default(),
             halted: false,
             io_devices,
+            dustbin: 0,
         }
     }
 
@@ -59,8 +62,12 @@ impl Processor {
         // Decode and execute the instruction.
         let instruction = Instruction::decode(val)?;
 
+        println!("Executing instruction: {instruction}");
+
         instruction.execute(self);
 
+        println!("ok!");
+
         Ok((addr, instruction))
     }
 
@@ -74,7 +81,10 @@ impl Processor {
     }
 
     pub fn reg(&mut self, reg: Register) -> &mut u32 {
-        self.registers.reg(reg)
+        match reg {
+            Register::Zero => &mut self.dustbin,
+            _ => self.registers.reg(reg),
+        }
     }
 
     pub fn display(&mut self) -> Vec<u8> {
diff --git a/emulator/src/emulator/ui/editor.rs b/emulator/src/emulator/ui/editor.rs
index 98cc1c2..6d55504 100644
--- a/emulator/src/emulator/ui/editor.rs
+++ b/emulator/src/emulator/ui/editor.rs
@@ -176,11 +176,31 @@ impl Editor {
             .set_directory(&work_dir)
             .pick_file()
         {
-            if let Ok(contents) = std::fs::read_to_string(&path) {
-                self.path = Some(path.clone());
-                self.text.clone_from(&contents);
-                self.buffer = contents;
-                self.unsaved = false;
+            match path.extension().and_then(|ext| ext.to_str()) {
+                Some("dsb") => {
+                    let contents = match std::fs::read(&path) {
+                        Ok(contents) => contents,
+                        Err(why) => {
+                            self.error = Some(format!("Failed to read file: {why}"));
+                            return;
+                        }
+                    };
+
+                    self.path = Some(path.clone());
+                    self.output = contents;
+                    self.unsaved = false;
+                    self.text = String::from("Loaded Binary File!");
+                    self.buffer = self.text.clone();
+                    self.unsaved = false;
+                }
+                _ => {
+                    if let Ok(contents) = std::fs::read_to_string(&path) {
+                        self.path = Some(path.clone());
+                        self.text.clone_from(&contents);
+                        self.buffer = contents;
+                        self.unsaved = false;
+                    }
+                }
             }
 
             std::env::set_current_dir(
@@ -346,22 +366,14 @@ impl Editor {
             // builds the current file
             if ui.button("Build").clicked() && !self.unsaved {
                 if let Some(path) = &self.path {
-                    let mut assembler = CompilerEngine::new();
-                    if let Err(error) = assembler.assemble(path) {
-                        self.error = Some(format!("Failed to assemble: {error:?}"));
-                        return;
-                    }
+                    let mut compiler = CompilerEngine::new();
+                    compiler.start_compilation(path);
 
-                    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(),
-                            );
+                    // Or block until done
+                    let instructions = match compiler.wait_for_result() {
+                        Ok(instructions) => instructions,
+                        Err(e) => {
+                            self.error = Some(e.to_string());
                             return;
                         }
                     };