BIOS Parameter Block (BPB) structure
00h WORD Bytes per Sector
02h BYTE Sectors per Cluster
03h WORD Reserved Sectors
05h BYTE Number of FATs
06h WORD Number of root directory entries
08h WORD Total number of sectors (zero if extended BPB)
0Ah BYTE Media descriptor byte
0Bh WORD Number of sectors per FAT
DOS3 Extensions
0Dh WORD Sectors per track
0Fh WORD Number of heads
11h DWORD Number of hidden sectors
15h 11 BYTEs reserved
DOS4 Extensions
19h BYTE Physical drive number
1Ah BYTE Reserved
1Bh BYTE Signature byte (29h)
1Ch DWORD Volume serial number
20h 11 BYTEs Volume label
2Bh 8 BYTEs File system type ( "FAT12" / "FAT16" ) |