Full savestating to memory

include/timer.h

@@ -9,6 +9,13 @@ typedef struct {
     u8 tac;
 } timer_context;
 
+typedef struct {
+    timer_context ctx;
+} timer_state;
+
+void timer_save_state(timer_state*);
+void timer_load_state(const timer_state*);
+
 void timer_init();
 void timer_tick();