rdram definition

src/lib.rs

@@ -1,3 +1,4 @@
 pub mod registers;
 pub mod cpu;
 pub mod mmu;
+pub mod rdram;

src/rdram.rs

@@ -0,0 +1,28 @@
+#[derive(Copy, Clone)]
+struct Byte {
+    data: u16,
+}
+
+impl Byte {
+    pub fn read(&self) -> u16 {
+        self.data & 0x1FF
+    }
+
+    pub fn write(&mut self, data: u16) {
+        self.data = data & 0x1FF;
+    }
+}
+
+struct RDRAM {
+    data: [Byte; 0x400000],
+}
+
+impl RDRAM {
+    pub fn read(&self, address: i64) -> u16 {
+        self.data[address as usize].read()
+    }
+
+    pub fn write(&mut self, address: i64, data: u16) {
+        self.data[address as usize].write(data);
+    }
+}