diff --git a/src/bus.rs b/src/bus.rs
index e37fb6c..adb19fd 100644
--- a/src/bus.rs
+++ b/src/bus.rs
@@ -72,6 +72,10 @@ impl Bus {
         self.timer.step(cycles);
         self.sound.step(cycles);
     }
+
+    pub fn timer(&self) -> Timer {
+        self.timer
+    }
 }
 
 impl Bus {
diff --git a/src/gui.rs b/src/gui.rs
index f7b8087..06daaec 100644
--- a/src/gui.rs
+++ b/src/gui.rs
@@ -143,6 +143,30 @@ impl Egui {
                 });
             });
 
+        egui::Window::new("Timer").show(ctx, |ui| {
+            let timer = game_boy.bus.timer();
+
+            ui.horizontal(|ui| {
+                ui.label("DIV");
+                ui.monospace(format!("{:#06X}", timer.divider));
+            });
+
+            ui.horizontal(|ui| {
+                ui.label("TIMA");
+                ui.monospace(format!("{:#04X}", timer.counter));
+            });
+
+            ui.horizontal(|ui| {
+                ui.label("TMA");
+                ui.monospace(format!("{:#04X}", timer.modulo));
+            });
+
+            ui.horizontal(|ui| {
+                ui.label("TAC");
+                ui.monospace(format!("{:?}", timer.control));
+            });
+        });
+
         egui::Window::new("Registers")
             .open(&mut self.show_registers)
             .show(ctx, |ui| {