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#ifndef _FAT_DEFINE 
 #include "FAT.c" 
#endif 
 
DWORD FATDiskFreeSize(void); 
 
DWORD FATDiskFreeSize(void) 
{ 
	StorageMedia.ReadSector(FAT.FSISec,DiskBuffer); 
	return(MEMSwap32(FSI->FreeCount) * FAT.SecPerClus * IDE.IDEDevice[IDE.Devices>>4].BytesPerSec); 
}