Lay down BaseCPU structure

src/backend/core/BaseCPU.hpp

@@ -0,0 +1,13 @@
+#pragma once
+#include <Registers.hpp>
+#include <Mem.hpp>
+
+namespace n64 {
+struct BaseCPU {
+  virtual ~BaseCPU() = default;
+  virtual int Step() {return 0;}
+  virtual void Reset() {}
+  Registers regs;
+  Mem mem;
+};
+}