+void sp_open_all(void);
+void sp_close_all(void);
+
+void InitPrecedingPlayfieldMemory(void);
+void InitGfxBuffers_SP(void);
+
+void InitGameEngine_SP(void);
+void GameActions_SP(byte *, boolean);
+
+unsigned int InitEngineRandom_SP(int);
+
+void setLevelInfoToDefaults_SP(void);
+void copyInternalEngineVars_SP(void);
+boolean LoadNativeLevel_SP(char *, int, boolean);
+void SaveNativeLevel_SP(char *);