PEI Phase
POST Codes – SEC Phase
| Description | Value |
| PEI_SIO_INIT | 0x70 |
| PEI_CPU_REG_INIT | 0x71 |
| PEI_CPU_AP_INIT | 0x72 |
| PEI_CPU_HT_RESET | 0x73 |
| PEI_PCIE_MMIO_INIT | 0x74 |
| PEI_NB_REG_INIT | 0x75 |
| PEI_SB_REG_INIT | 0x76 |
| PEI_PCIE_TRAINING | 0x77 |
| PEI_TPM_INIT | 0x78 |
| PEI_SMBUS_INIT | 0x79 |
| PEI_PROGRAM_CLOCK_GEN | 0x7A |
| PEI_IGD_EARLY_INITIAL | 0x7B |
| PEI_HECI_INIT | 0x7C |
| PEI_WATCHDOG_INIT | 0x7D |
| PEI_MEMORY_INIT | 0x7E |
| PEI_MEMORY_INIT_FOR_CRISIS | 0x7F |
| PEI_MEMORY_INSTALL | 0x80 |
| PEI_TXTPEI | 0x81 |
| PEI_SWITCH_STACK | 0x82 |
| PEI_MEMORY_CALLBACK | 0x83 |
| PEI_ENTER_RECOVERY_MODE | 0x84 |
| PEI_RECOVERY_MEDIA_FOUND | 0x85 |
| PEI_RECOVERY_MEDIA_NOT_FOUND | 0x86 |
| PEI_RECOVERY_LOAD_FILE_DONE | 0x87 |
| PEI_RECOVERY_START_FLASH | 0x88 |
| PEI_ENTER_DXEIPL | 0x89 |
| PEI_FINDING_DXE_CORE | 0x8A |
| PEI_GO_TO_DXE_CORE | 0x8B |
| PEI_IFFS_TRANSITION_START | 0x8C |
| PEI_IFFS_TRANSITION_END | 0x8D |