Technical specifications 
  8.6 BIOS description 
SIMATIC IPC847D 
Operating Instructions, 01/2014, A5E32997454-AA 
185 
76H  PEI_SB_REG_INIT  South Bridge Early Initial  Initialization of the South 
Service case 
77H  PEI_PCIE_TRAINING  PCIE Training  Training phase of the PCIE 
Service case 
Initialization of the SM Bus 
41H  DXE_SB_SPI_INIT  South bridge SPI initial  Initialization of the Serial 
Peripheral Interface in the 
Service case 
42H  DXE_CF9_RESET  Setup Reset service, 
Setup Reset service  Service case 
43H  DXE_SB_SERIAL_GPIO_INIT  South bridge Serial GPIO 
initial, 
Initializations of the serial 
GPIO 
Service case  
44H  DXE_SMMACCESS  Setup SMM ACCESS 
Setup SMM access service  Service case 
45H  DXE_NB_INIT  North bridge Middle initial  Initialization of the North 
Service case 
46H  DXE_SIO_INIT  Super I/O DXE initial  Initialization of the Super IO  Service case 
47H  DXE_LEGACY_REGION  Setup Legacy Region 
service, 
Setup service Legacy 
region 
Service case 
48H  DXE_SB_INIT  South Bridge Middle Initial  Initialization of the South 
Service case 
DXE_IDENTIFY_FLASH_DEVICE 
4AH  DXE_FTW_INIT  Fault Tolerant Write 
Checking of the write fault 
Service case 
4BH  DXE_VARIABLE_INIT  Variable Service Initial  Initialization of the variable 
Service case 
4CH  DXE_VARIABLE_INIT_FAIL  Fail to initial Variable 
Failure to initialize the 
Service case 
26H  BDS_CONNECT_LEGACY_ROM  Dispatch option ROMs  Callup of the Legacy Option 
Service case 
27H  BDS_ENUMERATE_ALL_BOOT_OP
Get boot device information  Determine the Boot Device 
Service case 
BDS_END_OF_BOOT_SELECTION 
Boot selection terminated 
2CH  BDS_EFI64_SHADOW_ALL_LEGAC
Shadow Misc Option ROM  Copying the Legacy Option 
Service case 
2DH  BDS_ACPI_S3SAVE  Save S3 resume required 
Make available for operating 
state S3 RAM 
Service case 
2EH  BDS_READY_TO_BOOT_EVENT  Last Chipset initial before 
Initialization of the last 
chipset before the OS Boot 
Service case