_IO_RESOURCE_DESCRIPTOR

Metadatacopy
struct _IO_RESOURCE_DESCRIPTOR {
    unsigned char Option;/* 0x0  1 */
    unsigned char Type;/* 0x1  1 */
    unsigned char ShareDisposition;/* 0x2  1 */
    unsigned char Spare1;/* 0x3  1 */
    unsigned short Flags;/* 0x4  2 */
    unsigned short Spare2;/* 0x6  2 */
    union {
        struct {
            unsigned long Length;/* 0x8  4 */
            unsigned long Alignment;/* 0xc  4 */
            union _LARGE_INTEGER MinimumAddress;/* 0x10  8 */
            union _LARGE_INTEGER MaximumAddress;/* 0x18  8 */
        } Port;/* 0x8  24 */
        struct {
            unsigned long Length;/* 0x8  4 */
            unsigned long Alignment;/* 0xc  4 */
            union _LARGE_INTEGER MinimumAddress;/* 0x10  8 */
            union _LARGE_INTEGER MaximumAddress;/* 0x18  8 */
        } Memory;/* 0x8  24 */
        struct {
            unsigned long MinimumVector;/* 0x8  4 */
            unsigned long MaximumVector;/* 0xc  4 */
        } Interrupt;/* 0x8  8 */
        struct {
            unsigned long MinimumChannel;/* 0x8  4 */
            unsigned long MaximumChannel;/* 0xc  4 */
        } Dma;/* 0x8  8 */
        struct {
            unsigned long Length;/* 0x8  4 */
            unsigned long Alignment;/* 0xc  4 */
            union _LARGE_INTEGER MinimumAddress;/* 0x10  8 */
            union _LARGE_INTEGER MaximumAddress;/* 0x18  8 */
        } Generic;/* 0x8  24 */
        struct {
            unsigned long Data[3];/* 0x8  12 */
        } DevicePrivate;/* 0x8  12 */
        struct {
            unsigned long Length;/* 0x8  4 */
            unsigned long MinBusNumber;/* 0xc  4 */
            unsigned long MaxBusNumber;/* 0x10  4 */
            unsigned long Reserved;/* 0x14  4 */
        } BusNumber;/* 0x8  16 */
        struct {
            void* AssignedResource;/* 0x8  4 */
        } AssignedResource;/* 0x8  4 */
        struct {
            unsigned char Type;/* 0x8  1 */
            unsigned char Reserved[3];/* 0x9  3 */
            void* AssignedResource;/* 0xc  4 */
            union _LARGE_INTEGER Transformation;/* 0x10  8 */
        } SubAllocateFrom;/* 0x8  16 */
        struct {
            unsigned long Priority;/* 0x8  4 */
            unsigned long Reserved1;/* 0xc  4 */
            unsigned long Reserved2;/* 0x10  4 */
        } ConfigData;/* 0x8  12 */
    } u;/* 0x8  24 */
};
/* source: Windows 2000 RC2 DDK Alpha libcntpr.lib CodeView type records; build 2128 per the DDK's ntverp.h */