typedef struct _WHEA_PCIX_DEVICE_ERROR
{
     WHEA_PCIX_DEV_VALIDATION_BITS ValidationBits;
     WHEA_ERROR_STATUS ErrorStatus;
     UCHAR IdInfo[16];
     ULONG MemoryNumber;
     ULONG IoNumber;
     UCHAR RegisterDataPairs[64];
} WHEA_PCIX_DEVICE_ERROR, *PWHEA_PCIX_DEVICE_ERROR;

Windows Vista Kernel Structures