Full savestating to memory

include/cpu.h

@@ -35,6 +35,13 @@ typedef struct {
     u8 int_flags;
 } cpu_context;
 
+typedef struct {
+    cpu_context ctx;
+} cpu_state;
+
+void cpu_save_state(cpu_state*);
+void cpu_load_state(const cpu_state*);
+
 void cpu_init();
 bool cpu_step();