Hexadecimal Character Table; Boot Phases; Debug Code Led Table - MSI MEG B550 UNIFY Manual

Hexadecimal Character Table

Hexadecimal 0
Debug Code
0 1 2 3 4 5 6 7 8 9 A B C D E F
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)
AP initialization before microcode loading
02
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
Cache initialization
0B
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
11 Pre-memory CPU initialization is started
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
1 2 3 4 5 6 7 8 9 A B C D E F
Onboard LEDs
37