-extern void _exit(int retval);
-extern void SysDebug(char *fmt, ...); //!< Now implemented in main.c
-extern void SysDebugV(char *fmt, ...);
-extern Uint SysLoadBin(char *path, Uint *entry);
-extern Uint SysUnloadBin(Uint Base);
-extern void SysSetFaultHandler(int (*Hanlder)(int));
-extern int open(char *filename, int flags);
-extern void close(int fd);