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Annotation of coherent/d/bin/dos/bpb.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * bpb.h
        !             3:  * BIOS parameter block (BPB).
        !             4:  * Cf. Duncan, p. 164.
        !             5:  * Cf. "Norton Disk Companion", pp. 143-144, for DOS 3.3 and later.
        !             6:  */
        !             7: #define        BPBOFF  0x0B                    /* Offset of BPB in boot sector */
        !             8: #ifdef _I386
        !             9: #pragma align 1
        !            10: #endif
        !            11: typedef        struct  bpb {
        !            12:        unsigned short  b_ssize;        /* Bytes per sector             */
        !            13:        unsigned char   b_clsize;       /* Sectors per cluster          */
        !            14:        unsigned short  b_reserved;     /* Reserved sectors, from 0     */
        !            15:        unsigned char   b_fats;         /* FATs                         */
        !            16:        unsigned short  b_files;        /* Root directory file entries  */
        !            17:        unsigned short  b_sectors;      /* Sectors                      */
        !            18:        unsigned char   b_media;        /* Media descriptor             */
        !            19:        unsigned short  b_fatsize;      /* Sectors per FAT              */
        !            20:        unsigned short  b_tracks;       /* Sectors per track            */
        !            21:        unsigned short  b_heads;        /* Heads                        */
        !            22:        unsigned short  b_hidden;       /* Hidden sectors               */
        !            23:        /* The following items are for DOS 3.3 and later only. */
        !            24:        unsigned short  b_hidden2;      /* Hidden sectors, second word  */
        !            25:        unsigned long   b_bigsectors;   /* Big sectors                  */
        !            26:        unsigned char   b_driveno;      /* Physical drive number        */
        !            27:        unsigned char   b_info[26];     /* More information...          */
        !            28: } BPB;
        !            29: #ifdef _I386
        !            30: #pragma align 
        !            31: #endif
        !            32: /* end of bpb.h */

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