1 /* $Id: bootsect.h,v 1.5 1997/02/22 09:40:43 peter Exp $ */
2 /* $NetBSD: bootsect.h,v 1.9 1997/11/17 15:36:17 ws Exp $ */
5 * Written by Paul Popelka (paulp@uts.amdahl.com)
7 * You can do anything you want with this software, just don't say you wrote
8 * it, and don't remove this notice.
10 * This software is provided "as is".
12 * The author supplies this software to be publicly redistributed on the
13 * understanding that the author is not responsible for the correct
14 * functioning of this software in any circumstances and is not liable for
15 * any damages caused by this software.
21 * Format of a boot sector. This is the first sector on a DOS floppy disk
22 * or the fist sector of a partition on a hard disk. But, it is not the
23 * first sector of a partitioned hard disk.
26 u_int8_t bsJump[3]; /* jump inst E9xxxx or EBxx90 */
27 int8_t bsOemName[8]; /* OEM name and version */
28 int8_t bsBPB[19]; /* BIOS parameter block */
29 int8_t bsDriveNumber; /* drive number (0x80) */
30 int8_t bsBootCode[479]; /* pad so struct is 512b */
31 u_int8_t bsBootSectSig0;
32 u_int8_t bsBootSectSig1;
38 int8_t exDriveNumber; /* drive number (0x80) */
39 int8_t exReserved1; /* reserved */
40 int8_t exBootSignature; /* ext. boot signature (0x29) */
41 #define EXBOOTSIG 0x29
42 int8_t exVolumeID[4]; /* volume ID number */
43 int8_t exVolumeLabel[11]; /* volume label */
44 int8_t exFileSysType[8]; /* fs type (FAT12 or FAT16) */
48 u_int8_t bsJump[3]; /* jump inst E9xxxx or EBxx90 */
49 int8_t bsOemName[8]; /* OEM name and version */
50 int8_t bsBPB[25]; /* BIOS parameter block */
51 int8_t bsExt[26]; /* Bootsector Extension */
52 int8_t bsBootCode[448]; /* pad so structure is 512b */
53 u_int8_t bsBootSectSig0;
54 u_int8_t bsBootSectSig1;
59 struct bootsector710 {
60 u_int8_t bsJump[3]; /* jump inst E9xxxx or EBxx90 */
61 int8_t bsOEMName[8]; /* OEM name and version */
62 int8_t bsPBP[53]; /* BIOS parameter block */
63 int8_t bsExt[26]; /* Bootsector Extension */
64 int8_t bsBootCode[418]; /* pad so structure is 512b */
65 u_int8_t bsBootSectSig2; /* 2 & 3 are only defined for FAT32? */
66 u_int8_t bsBootSectSig3;
67 u_int8_t bsBootSectSig0;
68 u_int8_t bsBootSectSig1;
76 * The boot sector on a gemdos fs is a little bit different from the msdos fs
77 * format. Currently there is no need to declare a seperate structure, the
78 * bootsector33 struct will do.
81 struct bootsec_atari {
82 u_int8_t bsBranch[2]; /* branch inst if auto-boot */
83 int8_t bsFiller[6]; /* anything or nothing */
84 int8_t bsSerial[3]; /* serial no. for mediachange */
85 int8_t bsBPB[19]; /* BIOS parameter block */
86 int8_t bsBootCode[482]; /* pad so struct is 512b */
92 struct bootsector33 bs33;
93 struct bootsector50 bs50;
94 struct bootsector710 bs710;
99 * Shorthand for fields in the bpb.
101 #define bsBytesPerSec bsBPB.bpbBytesPerSec
102 #define bsSectPerClust bsBPB.bpbSectPerClust
103 #define bsResSectors bsBPB.bpbResSectors
104 #define bsFATS bsBPB.bpbFATS
105 #define bsRootDirEnts bsBPB.bpbRootDirEnts
106 #define bsSectors bsBPB.bpbSectors
107 #define bsMedia bsBPB.bpbMedia
108 #define bsFATsecs bsBPB.bpbFATsecs
109 #define bsSectPerTrack bsBPB.bpbSectPerTrack
110 #define bsHeads bsBPB.bpbHeads
111 #define bsHiddenSecs bsBPB.bpbHiddenSecs
112 #define bsHugeSectors bsBPB.bpbHugeSectors