int getBeltDirFromBeltElement(int);
int getBeltDirFromBeltSwitchElement(int);
int getBeltElementFromBeltNrAndBeltDir(int, int);
+int getBeltSwitchElementFromBeltNrAndBeltDir(int, int);
unsigned int InitRND(long);
void InitGraphicInfo_EM(void);
+void PlayMenuSoundExt(int);
void PlayMenuSound();
void PlayMenuSoundStereo(int, int);
+void PlayMenuSoundIfLoopExt(int);
void PlayMenuSoundIfLoop();
+void PlayMenuMusicExt(int);
void PlayMenuMusic();
void PlaySoundActivating();
void PlaySoundSelecting();