CM_FLOPPY_DEVICE

CM_FLOPPY_DEVICE_DATA

typedef struct _CM_FLOPPY_DEVICE_DATA {
    USHORT Version;
    USHORT Revision;
    CHAR Size[8];
    ULONG MaxDensity;
    ULONG MountDensity;
    //
    // New data fields for version >= 2.0
    //
    UCHAR StepRateHeadUnloadTime;
    UCHAR HeadLoadTime;
    UCHAR MotorOffTime;
    UCHAR SectorLengthCode;
    UCHAR SectorPerTrack;
    UCHAR ReadWriteGapLength;
    UCHAR DataTransferLength;
    UCHAR FormatGapLength;
    UCHAR FormatFillCharacter;
    UCHAR HeadSettleTime;
    UCHAR MotorSettleTime;
    UCHAR MaximumTrackValue;
    UCHAR DataTransferRate;
} CM_FLOPPY_DEVICE_DATA, *PCM_FLOPPY_DEVICE_DATA;

CM_FLOPPY_DEVICE_DATA defines a device-type-specific data record that is stored in the \\Registry\Machine\Hardware\Description tree for a floppy controller if the system can collect this information during the boot process.

Members

Version: The version number of this structure.
Revision: The revision of this structure.
Size[8]: The floppy disk density size.
MaxDensity: The maximum density.
MountDensity: The mount density.
StepRateHeadUnloadTime: The step rate head unload time in milliseconds.
HeadLoadTime: The head load time in milliseconds.
MotorOffTime: The motor off time in seconds.
SectorLengthCode: Indicates the sector size as an exponent in the formula ((2**code) * 128).
SectorPerTrack: The number of sectors per track.
ReadWriteGapLength: The read/write gap length, in bytes.
DataTransferLength: The data transfer length, in bytes, not including the synchronization field.
FormatGapLength: The format gap length, in bytes.
FormatFillCharacter: The format fill character.
HeadSettleTime: The head settle time in milliseconds.
MotorSettleTime: The motor settle time in milliseconds.
MaximumTrackValue: The maximum track number on the media. Track numbers are zero-based values.
DataTransferRate: The value written to the Datarate register before accessing the media.

CM_FLOPPY_DEVICE_DATA

Members

See Also