diff --git a/src/cpu.rs b/src/cpu.rs
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/src/gpu.rs b/src/gpu.rs
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000000000000000000000000000000000000..d7f9bcc1635bd83924bca74449710d74c71cdf2d
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,3 @@
+mod cpu
+mod gpu
+mod mmu
diff --git a/src/mmu.rs b/src/mmu.rs
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391