MSI X99A WORKSTATION

47
LED Status Indicators
Debug Code LED
The Debug Code LED displays progress and error codes during and after POST. Refer
to the Debug Code LED table for details.
Hexadecimal Character Table
Hexadecimal 0 1 2 3 4 5 6 7 8 9 A B C D E F
Debug Code
LED display
0 1 2 3 4 5 6 7 8 9 A B C D E F
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, …)
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
2E
Memory initialization. Configuring
memory
2F Memory initialization (other)
31 Memory Installed
32 CPU post-memory initialization is started
33
CPU post-memory initialization. Cache
initialization
34
CPU post-memory initialization.
Application Processor(s) (AP)
initialization
35
CPU post-memory initialization. Boot
Strap Processor (BSP) selection
36
CPU post-memory initialization. System
Management Mode (SMM) initialization
37
Post-Memory System Agent initialization
is started
Debug Code LED Table