diff --git a/src/bus.rs b/src/bus.rs
index af6d4f1..b1941a2 100644
--- a/src/bus.rs
+++ b/src/bus.rs
@@ -106,7 +106,8 @@ impl Bus {
             0xFF00..=0xFF7F => {
                 // IO Registers
                 match addr {
-                    // 0xFF01 =>
+                    0xFF01 => self.serial.next,
+                    0xFF02 => self.serial.control.into(),
                     0xFF07 => self.timer.control.into(),
                     0xFF0F => self.interrupt.flag.into(),
                     0xFF11 => self.sound.ch1.sound_duty.into(),
@@ -176,6 +177,8 @@ impl Bus {
             0xFF00..=0xFF7F => {
                 // IO Registers
                 match addr {
+                    0xFF01 => self.serial.next = byte,
+                    0xFF02 => self.serial.control = byte.into(),
                     0xFF07 => self.timer.control = byte.into(),
                     0xFF0F => self.interrupt.flag = byte.into(),
                     0xFF11 => self.sound.ch1.sound_duty = byte.into(),
diff --git a/src/serial.rs b/src/serial.rs
index 0e87eb2..618660d 100644
--- a/src/serial.rs
+++ b/src/serial.rs
@@ -1,7 +1,7 @@
 #[derive(Debug, Clone, Copy, Default)]
 pub struct Serial {
-    next: u8,
-    control: SerialControl,
+    pub next: u8,
+    pub control: SerialControl,
 }
 
 #[derive(Debug, Clone, Copy, Default)]