struct BootSec 
{     	
	unsigned int   	BPB_BytesPerSec;       		
	unsigned char	BPB_SecPerClus;         		
	unsigned char	BPB_NumOfFat;         		           		
	unsigned int	BPB_SectPerFat;        	
	         		
};
void mf16_Init()
{
	unsigned long 	BootSector;
	struct BootSec *bootp;
	BootSector = 0;
	mmc_read(BootSector,temp);
	bootp=(struct BootSec *)temp;
	RootDirEntry =  bootp->BPB_ResrvdSector + 
	(bootp->BPB_NumOfFat * bootp->BPB_SectPerFat);
	RootDirEntry+= BootSector;
	ClusterOffset = ((bootp->BPB_BytesPerSec * 32)/BlockSize);
	ClusterOffset+= RootDirEntry;
	FatStart = BootSector + bootp->BPB_ResrvdSector;
	SectPerCluster = bootp->BPB_SecPerClus;
}