copy
//0x200 bytes (sizeof)
struct _KTRANSITION_STACK
{
    union
    {
        UCHAR Stack[512];                                                   //0x0
        struct
        {
            UCHAR IstStack[464];                                            //0x0
            struct _KIST_BASE_FRAME IstFrame;                               //0x1d0
        };
    };
};