diff --git a/src/bus.rs b/src/bus.rs
new file mode 100644
index 0000000..048b8f0
--- /dev/null
+++ b/src/bus.rs
@@ -0,0 +1,32 @@
+pub enum MemoryMap {
+    BankZero,
+    BankSwitchable,
+    VideoRAM,
+    ExternalRAM,
+    WorkRAM1,
+    WorkRAM2,
+    EchoRAM,
+    SpriteAttributeTable,
+    NotUsable,
+    IORegisters,
+    HighRAM,
+    InterruptEnableRegister,
+}
+
+impl MemoryMap {
+    pub fn get_map(address: u16) -> Self {
+        if address <= 0x3FFF {return Self::BankZero;}
+        if address >= 0x4000 && address <= 0x7FFF {return Self::BankSwitchable;}
+        if address >= 0x8000 && address <= 0x9FFF {return Self::VideoRAM;}
+        if address >= 0xA000 && address <= 0xBFFF {return Self::ExternalRAM;}
+        if address >= 0xC000 && address <= 0xCFFF {return Self::WorkRAM1;}
+        if address >= 0xD000 && address <= 0xDFFF {return Self::WorkRAM2;}
+        if address >= 0xE000 && address <= 0xFDFF {return Self::EchoRAM;} // Mirror of C000~DDFF
+        if address >= 0xFE00 && address <= 0xFE9F {return Self::SpriteAttributeTable;}
+        if address >= 0xFEA0 && address <= 0xFEFF {return Self::NotUsable;}
+        if address >= 0xFF00 && address <= 0xFF7F {return Self::IORegisters;}
+        if address >= 0xFF80 && address <= 0xFFFE {return Self::HighRAM;}
+        if address == 0xFFFF {return Self::InterruptEnableRegister;}
+        Self::BankZero
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index 73e657f..c15102f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,4 @@
 pub mod utils;
 pub mod cpu;
 pub mod rom;
+pub mod bus;
diff --git a/src/utils.rs b/src/utils.rs
index d2d1171..77a2d7f 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -1,5 +1,3 @@
-pub struct AddressRange(u16, u16);
-
 pub enum BitIndex {
     I0,
     I1,