00 - Not used
01 - Power on. Reset type detection (soft/hard).
02 - AP initialization before microcode loading
03 - System Agent initialization before microcode loading
04 - PCH initialization before microcode loading
05 - OEM initialization before microcode loading
06 - Microcode loading
07 - AP initialization after microcode loading
08 - System Agent initialization after microcode loading
09 - PCH initialization after microcode loading
0A - OEM initialization after microcode loading
0B - Cache initialization
0C – 0D - Reserved for future AMI SEC error codes
0E - Microcode not found
0F - Microcode not loaded
10 - PEI Core is started
11 – 14 - Pre-memory CPU initialization is started
15 – 18 - Pre-memory System Agent initialization is started
19 – 1C - Pre-memory PCH initialization is started
1D – 2A - OEM pre-memory initialization codes
2B – 2F - Memory initialization
30 - Reserved for ASL (see ASL Status Codes section below)
31 - Memory Installed
32 – 36 - CPU post-memory initialization
37 – 3A - Post-Memory System Agent initialization is started
3B – 3E - Post-Memory PCH initialization is started
3F – 4E - OEM post memory initialization codes
4F - DXE IPL is started
50 – 53 - Memory initialization error. Invalid memory type or incompatible memory speed
54 - Unspecified memory initialization error
55 - Memory not installed
56 - Invalid CPU type or Speed
57 - CPU mismatch
58 - CPU self test failed or possible CPU cache error
59 - CPU micro-code is not found or micro-code update is failed
5A - Internal CPU error
5B - Reset PPI is not available
5C – 5F - Reserved for future AMI error codes
E0 - S3 Resume is stared (S3 Resume PPI is called by the DXE IPL)
E1 - S3 Boot Script execution
E2 - Video repost
E3 - OS S3 wake vector call
E4 – E7 - Reserved for future AMI progress codes
E8 - S3 Resume Failed
E9 - S3 Resume PPI not Found
EA - S3 Resume Boot Script Error
EB - S3 OS Wake Error
EC – EF - Reserved for future AMI error codes
F0 - Recovery condition triggered by firmware (Auto recovery)
F1 - Recovery condition triggered by user (Forced recovery)
F2 - Recovery process started
F3 - Recovery firmware image is found
F4 - Recovery firmware image is loaded
F5-F7 - Reserved for future AMI progress codes
F8 - Recovery PPI is not available
F9 - Recovery capsule is not found
FA - Invalid recovery capsule
FB-FF - Reserved for future AMI error codes
60 - DXE Core is started
61 - NVRAM initialization
62 - Installation of the PCH Runtime Services
63 – 67 - CPU DXE initialization is started
68 - PCI host bridge initialization
69 - System Agent DXE initialization is started
6A - System Agent DXE SMM initialization is started
6B – 6F - System Agent DXE initialization (System Agent module specific)
70 - PCH DXE initialization is started
71 - PCH DXE SMM initialization is started
72 - PCH devices initialization
73 – 77 - PCH DXE Initialization (PCH module specific)
78 - ACPI module initialization
79 - CSM initialization
7A – 7F - Reserved for future AMI DXE codes
80 – 8F - OEM DXE initialization codes
90 - Boot Device Selection (BDS) phase is started
91 - Driver connecting is started
92 - PCI Bus initialization is started
93 - PCI Bus Hot Plug Controller Initialization
94 - PCI Bus Enumeration
95 - PCI Bus Request Resources
96 - PCI Bus Assign Resources
97 - Console Output devices connect
98 - Console input devices connect
99 - Super IO Initialization
9A - USB initialization is started
9B - USB Reset
9C - USB Detect
9D - USB Enable
9E – 9F - Reserved for future AMI codes
A0 - IDE initialization is started
A1 - IDE Reset
A2 - IDE Detect
A3 - IDE Enable
A4 - SCSI initialization is started
A5 - SCSI Reset
A6 - SCSI Detect
A7 - SCSI Enable
A8 - Setup Verifying Password
A9 - Start of Setup
AA - Reserved for ASL (see ASL Status Codes section below)*
AB - Setup Input Wait
AC - Reserved for ASL (see ASL Status Codes section below)
AD - Ready To Boot event
AE - Legacy Boot event
AF - Exit Boot Services event
B0 - Runtime Set Virtual Address MAP Begin
B1 - Runtime Set Virtual Address MAP End
B2 - Legacy Option ROM Initialization
B3 - System Reset
B4 - USB hot plug
B5 - PCI bus hot plug
B6 - Clean-up of NVRAM
B7 - Configuration Reset (reset of NVRAM settings)
B8– BF - Reserved for future AMI codes
C0– CF - OEM BDS initialization codes
D0 - CPU initialization error
D1 - System Agent initialization error
D2 - PCH initialization error
D3 - Some of the Architectural Protocols are not available
D4 - PCI resource allocation error. Out of Resources
D5 - No Space for Legacy Option ROM
D6 - No Console Output Devices are found
D7 - No Console Input Devices are found
D8 - Invalid password
D9 - Error loading Boot Option (LoadImage returned error
DA - Boot Option is failed (StartImage returned error)
DB - Flash update is failed
DC - Reset protocol is not available

*ASL Status Codes
01 - System is entering S1 sleep state
02 - System is entering S2 sleep state
03 - System is entering S3 sleep state
04 - System is entering S4 sleep state
05 - System is entering S5 sleep state
10 - System is waking up from the S1 sleep state
20 - System is waking up from the S2 sleep state
30 - System is waking up from the S3 sleep state
40 - System is waking up from the S4 sleep state
AC - System has transitioned into ACPI mode. Interrupt controller is in PIC mode
AA - System has transitioned into ACPI mode. Interrupt controller is in APIC mode