1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/*
// Program: Format
// Version: 0.91m
// Written By: Brian E. Reifsnyder
// Copyright: 2002 under the terms of the GNU GPL, Version 2
// Module Name: btstrct.h
// Module Description: Boot sector structures header file.
*/
#ifndef BTSTRCT_H
#define BTSTRCT_H 1
#ifdef MAIN
#define BTEXTERN /* */
#else
#define BTEXTERN extern
#endif
#define BT8 unsigned char
#define BT16 unsigned int
typedef struct Standard_Boot_Sector_Fields
{
BT8 jmp[3] ; /* 0x00 0 */
BT8 oem_id[8]; /* 0x03 3 */
} STD_BS;
typedef struct Standard_BPB
{
BT16 bytes_per_sector ; /* 0x0b 11 */
BT8 sectors_per_cluster ; /* 0x0d 13 */
BT16 reserved_sectors ; /* 0x0e 14 */
BT8 number_of_fats ; /* 0x10 16 */
BT16 root_directory_entries ; /* 0x11 17 */
BT16 total_sectors ; /* 0x13 19 */
BT8 media_descriptor ; /* 0x15 21 */
BT16 sectors_per_fat ; /* 0x16 22 */
BT16 sectors_per_cylinder ; /* 0x18 24 */
BT16 number_of_heads ; /* 0x1a 26 */
BT16 hidden_sectors_low ; /* 0x1c 28 */
BT16 hidden_sectors_high ; /* 0x1e 30 */
BT16 large_sector_count_low ; /* 0x20 32 */
BT16 large_sector_count_high; /* 0x22 34 */
} STD_BPB;
typedef struct FAT32_BPB_Extension
{
BT16 fat_size_low ; /* 0x24 36 */
BT16 fat_size_high ; /* 0x26 38 */
BT16 ext_flags ; /* 0x28 40 */
BT16 file_system_version; /* 0x2a 42 */
BT16 root_dir_start_low ; /* 0x2c 44 */
BT16 root_dir_start_high; /* 0x2e 46 */
BT16 info_sector_number ; /* 0x30 48 */
BT16 backup_boot_sector ; /* 0x32 50 */
BT8 reserved_1[12] ; /* 0x34 52 */
} FAT32_BPB;
typedef struct Extended_Boot_Sector /* follows BPB or FAT32_BPB */
{
BT8 drive_number ; /* varies */
BT8 reserved ; /* varies */
BT8 signature_byte ; /* varies */
BT8 serial_number[4] ; /* varies */
BT8 volume_label[11] ; /* varies */
BT8 file_system_type[8]; /* varies */
} EXT_BS;
BTEXTERN STD_BS bs_start;
BTEXTERN EXT_BS bs_ext;
#endif
|
