//0x40 bytes (sizeof)
struct _DEVICE_DESCRIPTION
{
ULONG Version; //0x0
UCHAR Master; //0x4
UCHAR ScatterGather; //0x5
UCHAR DemandMode; //0x6
UCHAR AutoInitialize; //0x7
UCHAR Dma32BitAddresses; //0x8
UCHAR IgnoreCount; //0x9
UCHAR Reserved1; //0xa
UCHAR Dma64BitAddresses; //0xb
ULONG BusNumber; //0xc
ULONG DmaChannel; //0x10
enum _INTERFACE_TYPE InterfaceType; //0x14
enum _DMA_WIDTH DmaWidth; //0x18
enum _DMA_SPEED DmaSpeed; //0x1c
ULONG MaximumLength; //0x20
ULONG DmaPort; //0x24
ULONG DmaAddressWidth; //0x28
ULONG DmaControllerInstance; //0x2c
ULONG DmaRequestLine; //0x30
union _LARGE_INTEGER DeviceAddress; //0x38
};