Getbpb()
#include osbind.h>
typedef struct short recsiz;bytes per sector short clsiz;sectors per cluster short clsizb;bytes per cluster short rdlen;root directory size short fsiz;length of fat short fatrec;start sec. of 2nd FAT short datrec;1st data sector short numcl;no. of clusters on medium short bflags;some flags _BPB