diff --git a/src/core.cc b/src/core.cc
index d22b221..19d02da 100644
--- a/src/core.cc
+++ b/src/core.cc
@@ -17,11 +17,11 @@
 #include <limits.h>
 #include <string.h>
 
-// NOT USED.
-void (*_idle_func)() = NULL;
+// 0x51E234
+IdleFunc* _idle_func = NULL;
 
-// NOT USED.
-void (*_focus_func)(int) = NULL;
+// 0x51E238
+FocusFunc* _focus_func = NULL;
 
 // 0x51E23C
 int gKeyboardKeyRepeatRate = 80;
@@ -922,6 +922,70 @@ unsigned int _get_bk_time()
     return gTickerLastTimestamp;
 }
 
+// NOTE: Unused.
+//
+// 0x4C9418
+void inputSetKeyboardKeyRepeatRate(int value)
+{
+    gKeyboardKeyRepeatRate = value;
+}
+
+// NOTE: Unused.
+//
+// 0x4C9420
+int inputGetKeyboardKeyRepeatRate()
+{
+    return gKeyboardKeyRepeatRate;
+}
+
+// NOTE: Unused.
+//
+// 0x4C9428
+void inputSetKeyboardKeyRepeatDelay(int value)
+{
+    gKeyboardKeyRepeatDelay = value;
+}
+
+// NOTE: Unused.
+//
+// 0x4C9430
+int inputGetKeyboardKeyRepeatDelay()
+{
+    return gKeyboardKeyRepeatDelay;
+}
+
+// NOTE: Unused.
+//
+// 0x4C9438
+void inputSetFocusFunc(FocusFunc* func)
+{
+    _focus_func = func;
+}
+
+// NOTE: Unused.
+//
+// 0x4C9440
+FocusFunc* inputGetFocusFunc()
+{
+    return _focus_func;
+}
+
+// NOTE: Unused.
+//
+// 0x4C9448
+void inputSetIdleFunc(IdleFunc* func)
+{
+    _idle_func = func;
+}
+
+// NOTE: Unused.
+//
+// 0x4C9450
+IdleFunc* inputGetIdleFunc()
+{
+    return _idle_func;
+}
+
 // 0x4C9490
 void buildNormalizedQwertyKeys()
 {
@@ -1375,7 +1439,7 @@ void _GNW95_process_key(KeyboardData* data)
 void _GNW95_lost_focus()
 {
     if (_focus_func != NULL) {
-        _focus_func(0);
+        _focus_func(false);
     }
 
     while (!gProgramIsActive) {
@@ -1387,7 +1451,7 @@ void _GNW95_lost_focus()
     }
 
     if (_focus_func != NULL) {
-        _focus_func(1);
+        _focus_func(true);
     }
 }
 
diff --git a/src/core.h b/src/core.h
index 575a1c9..9210f52 100644
--- a/src/core.h
+++ b/src/core.h
@@ -414,7 +414,9 @@ typedef struct InputEvent {
     int mouseY;
 } InputEvent;
 
-typedef void TickerProc();
+typedef void(IdleFunc)();
+typedef void(FocusFunc)(bool focus);
+typedef void(TickerProc)();
 
 typedef struct TickerListNode {
     int flags;
@@ -461,8 +463,8 @@ typedef int(PauseHandler)();
 typedef int(ScreenshotHandler)(int width, int height, unsigned char* buffer, unsigned char* palette);
 typedef void(VcrPlaybackCompletionCallback)(int reason);
 
-extern void (*_idle_func)();
-extern void (*_focus_func)(int);
+extern IdleFunc* _idle_func;
+extern FocusFunc* _focus_func;
 extern int gKeyboardKeyRepeatRate;
 extern int gKeyboardKeyRepeatDelay;
 extern bool _keyboard_hooked;
@@ -596,6 +598,14 @@ void coreDelay(unsigned int ms);
 unsigned int getTicksSince(unsigned int a1);
 unsigned int getTicksBetween(unsigned int a1, unsigned int a2);
 unsigned int _get_bk_time();
+void inputSetKeyboardKeyRepeatRate(int value);
+int inputGetKeyboardKeyRepeatRate();
+void inputSetKeyboardKeyRepeatDelay(int value);
+int inputGetKeyboardKeyRepeatDelay();
+void inputSetFocusFunc(FocusFunc* func);
+FocusFunc* inputGetFocusFunc();
+void inputSetIdleFunc(IdleFunc* func);
+IdleFunc* inputGetIdleFunc();
 void buildNormalizedQwertyKeys();
 int _GNW95_input_init();
 void _GNW95_process_message();