Experimental save state support

src/backend/core/BaseCPU.hpp

@@ -12,6 +12,8 @@ struct BaseCPU {
   }
   virtual bool ShouldServiceInterrupt() = 0;
   virtual void CheckCompareInterrupt() = 0;
+  virtual std::vector<u8> Serialize() = 0;
+  virtual void Deserialize(const std::vector<u8>&) = 0;
   Registers regs;
   Mem mem;
 };