Table of Contents
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Hexadecimal Character Table
Hexadecimal
Debug Code
LED display
Boot Phases
Security (SEC) – initial low-level initialization
Pre-EFI Initialization (PEI) – memory initialization
Driver Execution Environment (DXE) – main hardware initialization
Boot Device Selection (BDS) – system setup, pre-OS user interface & selecting a
bootable device (CD/DVD, HDD, USB, Network, Shell, ...)
Debug Code LED Table
SEC Progress Codes
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
06
Microcode loading
07
AP initialization after microcode loading
08
System Agent initialization after microcode loading
09
PCH initialization after microcode loading
0B
Cache initialization
SEC Error Codes
0C - 0D
Reserved for future AMI SEC error codes
0E
Microcode not found
0F
Microcode not loaded
PEI Progress Codes
10
PEI Core is started
Pre-memory CPU initialization is started
11
12 - 14
Pre-memory CPU initialization (CPU module specific)
15
Pre-memory System Agent initialization is started
16 - 18
Pre-Memory System Agent initialization (System Agent module specific)
19
Pre-memory PCH initialization is started
1A - 1C
Pre-memory PCH initialization (PCH module specific)
2B
Memory initialization. Serial Presence Detect (SPD) data reading
2C
Memory initialization. Memory presence detection
2D
Memory initialization. Programming memory timing information
50
Onboard LEDs
0
1
2
3
4
0 1 2 3 4 5 6 7 8 9 A B C D E F
5
6
7
8
9
A
B
C
D
E
F
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