diff --git a/src/constants.rs b/src/constants.rs
new file mode 100644
index 0000000..c7d16e5
--- /dev/null
+++ b/src/constants.rs
@@ -0,0 +1,2 @@
+// Hz
+pub const CLOCK_SPEED: usize = 4194304;
diff --git a/src/main.rs b/src/main.rs
index 6789ec8..949b788 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,6 @@
 #![feature(exclusive_range_pattern, let_chains, slice_flatten, async_closure)]
 
+mod constants;
 mod processor;
 mod util;
 
diff --git a/src/processor/memory/mmio/apu.rs b/src/processor/memory/mmio/apu.rs
index 45915eb..15bb435 100644
--- a/src/processor/memory/mmio/apu.rs
+++ b/src/processor/memory/mmio/apu.rs
@@ -1,6 +1,7 @@
 use self::types::{Channels, DacSample, Mixer, VinEnable, Volume};
 use crate::{
-    processor::{memory::Address, timer::CLOCK_SPEED},
+    constants::CLOCK_SPEED,
+    processor::memory::Address,
     util::{get_bit, set_or_clear_bit},
 };
 use async_ringbuf::{AsyncHeapProducer, AsyncHeapRb};
diff --git a/src/processor/memory/mmio/mod.rs b/src/processor/memory/mmio/mod.rs
index 50b454a..7f65850 100644
--- a/src/processor/memory/mmio/mod.rs
+++ b/src/processor/memory/mmio/mod.rs
@@ -2,7 +2,9 @@ mod apu;
 pub(crate) mod gpu;
 mod joypad;
 mod serial;
+mod timer;
 pub use apu::Apu;
 pub use gpu::Gpu;
 pub use joypad::Joypad;
 pub use serial::Serial;
+pub use timer::Timer;
diff --git a/src/processor/timer.rs b/src/processor/memory/mmio/timer.rs
similarity index 91%
rename from src/processor/timer.rs
rename to src/processor/memory/mmio/timer.rs
index 020d72c..4136de8 100644
--- a/src/processor/timer.rs
+++ b/src/processor/memory/mmio/timer.rs
@@ -3,13 +3,13 @@ use crate::{
     util::{get_bit, set_bit},
 };
 
-pub(super) struct Timers {
+pub struct Timer {
     div_counter: usize,
     tima_counter: usize,
 }
 
-impl Timers {
-    pub(super) fn init() -> Self {
+impl Timer {
+    pub fn init() -> Self {
         Self {
             div_counter: 0,
             tima_counter: 0,
@@ -17,14 +17,12 @@ impl Timers {
     }
 }
 
-// Hz
-pub const CLOCK_SPEED: usize = 4194304;
 // this will need to change when cgb mode is implemented
 // as it uses bit 5 in double speed mode
 const AUDIO_BIT: u8 = 4;
 
 impl Cpu {
-    pub(super) fn increment_timers(&mut self, machine_cycles: u8) {
+    pub fn increment_timers(&mut self, machine_cycles: u8) {
         let clock_cycles = (machine_cycles as usize) * 4;
 
         self.advance_mmio_clocks(clock_cycles);
diff --git a/src/processor/mod.rs b/src/processor/mod.rs
index 6278c4d..cdbf6a2 100644
--- a/src/processor/mod.rs
+++ b/src/processor/mod.rs
@@ -1,6 +1,6 @@
 use std::time::Instant;
 
-use self::{memory::Memory, timer::Timers};
+use self::memory::{mmio::Timer, Memory};
 use crate::{
     util::{clear_bit, get_bit},
     verbose_println,
@@ -10,7 +10,6 @@ use gilrs::Gilrs;
 mod instructions;
 pub mod memory;
 mod opcodes;
-mod timer;
 
 #[derive(PartialEq)]
 pub(crate) enum Flags {
@@ -31,7 +30,7 @@ pub struct Cpu {
     pub last_instruction: u8,
     last_instruction_addr: u16,
     halted: bool,
-    timers: Timers,
+    timers: Timer,
     gamepad_handler: Gilrs,
     cycle_start: Instant,
 }
@@ -47,7 +46,7 @@ impl Cpu {
             last_instruction: 0x0,
             last_instruction_addr: 0x0,
             halted: false,
-            timers: Timers::init(),
+            timers: Timer::init(),
             gamepad_handler,
             cycle_start: Instant::now(),
         }