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15: typedef struct _CHS 
16: { 
17: BYTE Head ; 
18: BYTE Sector ; 
19: BYTE Cylinder ; 
20: } CHS ; 
21: 
22: typedef union _CHSAddr 
23: { 
24: CHS chs ; 
25: BYTE Address [ 3 ] ; 
26: } CHSAddr ; 
27: 
28: typedef struct _Partion_Table_Entry { 
29: BYTE Status ; 
30: CHSAddr StartCHSAddress ; 
31: BYTE PartitionType ; 
32: CHSAddr EndCHSAddress ; 
33: DWORD FirstLBA ; 
34: DWORD TotalSectors ; 
35: } Partion_Table_Entry ; 
36: 
37: typedef struct { 
38: BYTE Code [ 446 ] ; 
39: Partion_Table_Entry ptable [ 4 ] ; 
40: WORD Signature55AA < format = hex > ; 
41: if ( Signature55AA != 0xAA55 ) 
42: { 
43: Warning ( "Invalid MBR" ) ; 
44: return 1 ; 
45: } 
46: } MBR ; 
47: 
48: 
49: 
50: typedef struct _FAT16BootSector 
51: { 
52: BYTE JumpCode [ 3 ] ; 
53: BYTE OEM_Name [ 8 ] ; 
54: WORD BytesPerSector ; 
55: BYTE SectorsPerCluster ; 
56: WORD ReservedSectorCount ; 
57: BYTE NumberOfFAT ; 
58: WORD MAX_RootDirEntry ; 
59: WORD TotalSectors ; 
60: BYTE MediaDescriptor ; 
61: WORD SectorsPerFAT ; 
62: WORD SectorsPerTrack ; 
63: WORD NumberOfHeads ; 
64: DWORD HiddenSectorsBeforePartition ; 
65: DWORD TotalSectors ; 
66: BYTE PhysicalDriveNumber ; 
67: BYTE Reserved ; 
68: BYTE ExtendedBootSignature ; 
69: BYTE SerialNumber [ 4 ] ; 
70: BYTE VolumeLable [ 11 ] ; 
71: BYTE FAT_Type [ 8 ] ; 
72: BYTE BootCode [ 448 ] ; 
73: WORD BootSectorSignature ; 
74: } FAT16BootSector ; 
75: 
76: 
77: 
78: local unsigned int FATEntryCount = 0 ; 
79: typedef struct _FAT16 
80: { 
81: WORD Table [ FATEntryCount ] ; 
82: } FAT16 ; 
83: 
84: 
85: 
86: typedef struct _RootDirEntry 
87: { 
88: BYTE name [ 8 ] ; 
89: BYTE extn [ 3 ] ; 
90: BYTE attributes ; 
91: BYTE reserved [ 10 ] ; 
92: WORD time ; 
93: WORD date ; 
94: WORD firstDataBlock ; 
95: DWORD size ; 
96: } RootDirEntry ; 
97: 
98: LittleEndian ( ) ; 
99: FSeek ( 0 ) ; 
100: 
101: 
102: MBR MasterBootRecord ; 
103: 
104: 
105: 
106: local unsigned int partition_index = 0 ; 
107: typedef struct _Fat16Partition 
108: { 
109: 
110: local unsigned int startBYTE = ( MasterBootRecord . ptable [ partition_index ] . FirstLBA * 512 ) ; 
111: FSeek ( startBYTE ) ; 
112: FAT16BootSector BtSector ; 
113: 
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116: 
117: 
118: FSkip ( ( BtSector . ReservedSectorCount - 1 ) * 512 ) ; 
119: 
120: local unsigned int FATsize = ( BtSector . SectorsPerFAT * 512 ) / 2 ; 
121: local unsigned int FATcnt = 0 ; 
122: for ( FATcnt = 0 ; FATcnt < BtSector . NumberOfFAT ; ++ FATcnt ) 
123: { 
124: FATEntryCount = FATsize ; 
125: FAT16 FAT ; 
126: } 
127: 
128: 
129: 
130: 
131: RootDirEntry rootDir [ BtSector . MAX_RootDirEntry ] ; 
132: 
133: 
134: } Fat16Partition ; 
135: 
136: 
137: 
138: typedef struct _Disk 
139: { 
140: 
141: local int part ; 
142: for ( part = 0 ; part < 4 ; ++ part ) 
143: { 
144: if ( MasterBootRecord . ptable [ part ] . FirstLBA ) 
145: { 
146: partition_index = part ; 
147: Fat16Partition FAT16partition ; 
148: } 
149: } 
150: } Disk ; 
151: 
152: Disk dsk ; 
153: 
154: 
155: tok_eof