Full savestating to memory

lib/timer.c

@@ -97,3 +97,11 @@ u8 timer_read(u16 address) {
 timer_context *timer_get_context() {
     return &ctx;
 }
+
+void timer_save_state(timer_state* state) {
+    state->ctx = ctx;
+}
+
+void timer_load_state(const timer_state* state) {
+    ctx = state->ctx;
+}