_FireWire: The IEEE 1394 High-speed Serial Bus_
by Thomas Tewell

Listing One
typedef struct _ISOCH_DESCRIPTOR {
        struct _ISOCH_DESCRIPTOR  *Next;
        ULONG                      fulFlags;
        PVOID                      lpBuffer;
        ULONG                      ulLength;
        ULONG                      ulSynchronize;
        ULONG                      ulCycle; (not used)
        LARGE_INTEGER              SystemTime; (not used)
        LPVOID                     lpCallback;
        LPVOID                     lpWaterLineCallback;
        DWORD                      ulWaterLine;
        LPVOID                     lpContext;
        ULONG                      Status; (not used)
        ULONG                      PacketSize;
        ULONG                      ulReserved[4]; (not used)
} ISOCH_DESCRIPTOR, *PISOCH_DESCRIPTOR;