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#define INCL_DOSDEVIOCTL
 
typedef struct _BIOSPARAMETERBLOCK {    /* bspblk */
    USHORT usBytesPerSector;
    BYTE   bSectorsPerCluster;
    USHORT usReservedSectors;
    BYTE   cFATs;
    USHORT cRootEntries;
    USHORT cSectors;
    BYTE   bMedia;
    USHORT usSectorsPerFAT;
    USHORT usSectorsPerTrack;
    USHORT cHeads;
    ULONG  cHiddenSectors;
    ULONG  cLargeSectors;
    BYTE   abReserved[6];
    USHORT cCylinders;
    BYTE   bDeviceType;
    USHORT fsDeviceAttr;
} BIOSPARAMETERBLOCK;
 
The BIOSPARAMETERBLOCK structure contains BIOS parameter blocks.
 
Field               Description
────────────────────────────────────────────────────────────────────────────
 
usBytesPerSector    Specifies the bytes per sector.
 
bSectorsPerCluster  Specifies the sectors per cluster.
 
usReservedSectors   Specifies the reserved sectors.
 
cFATs               Specifies the number of file-allocation tables.
 
cRootEntries        Specifies the maximum number of entries in the root
                    directory.
 
cSectors            Specifies the number of sectors.
 
bMedia              Specifies the media descriptor.
 
usSectorsPerFAT     Specifies the number of sectors per file-allocation
                    table.
 
usSectorsPerTrack   Specifies the number of sectors per track.
 
cHeads              Specifies the number of heads.
 
cHiddenSectors      Specifies the number of hidden sectors.
 
cLargeSectors       Specifies the number of large sectors.
 
abReserved[6]       Specifies six reserved bytes. These must be zero.
 
cCylinders          Specifies the number of cylinders defined for the
                    device.
 
bDeviceType         Specifies the type of device. It can be one of the
                    following values:
 
                    Value            Meaning
                    ────────────────────────────────────────────────────────
                    DEVTYPE_48TPI    48 tracks-per-inch, low-density
                                     floppy-disk drive
 
                    DEVTYPE_96TPI    96 tracks-per-inch, high-density
                                     floppy-disk drive
 
                    DEVTYPE_35       3.5-inch (720K) floppy-disk drive
 
                    DEVTYPE_8SD      8-inch, single-density floppy-disk
                                     drive
 
                    DEVTYPE_8DD      8-inch, double-density floppy-disk
                                     drive
 
                    DEVTYPE_FIXED    Fixed disk
 
                    DEVTYPE_TAPE     Tape drive
 
                    DEVTYPE_UNKNOWN  Other (unknown type of device)
 
fsDeviceAttr        Specifies information about the drive. If this value is
                    0x0001, the media are not removable. If it is 0x0002,
                    the media can detect changes. This field can be one or
                    both of these values.
 
See Also
 
DSK_GETDEVICEPARAMS, DSK_SETDEVICEPARAMS
 
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