MSI MEG B550 UNIFY-X User Manual - Page 50

Hexadecimal Character Table Hexadecimal 0 1 2 3 4 5 6 7 8 9 A B C D E F Debug Code LED display 0123456789ABCDEF 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 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 50 Onboard LEDs