Intel S1200SPL Technical Spesification page 138

Intel® Server Board S1200SP Family Technical Product Specification
Diagnostic LED Decoder
1 = LED On, 0 = LED Off
Checkpoint Upper Nibble
MSB
8h 4h
LED #7 #6
BCh 1 0 1
BFh 1 0 1
Memory Initialization at the beginning of POST includes multiple functions, including: discovery, channel
training, validation that the DIMM population is acceptable and functional, initialization of the IMC and other
hardware settings, and initialization of applicable RAS configurations.
When a major memory initialization error occurs and prevents the system from booting with data integrity, a
beep code is generated, the MRC will display a fatal error code on the diagnostic LEDs, and a system halt
command is executed. Fatal MRC error halts do NOT change the state of the System Status LED, and they do
NOT get logged as SEL events. The following table lists all MRC fatal errors that are displayed to the Diagnostic
LEDs.
Diagnostic LED Decoder
1 = LED On, 0 = LED Off
Checkpoint Upper Nibble
MSB
8h 4h
LED #7 #6
MRC Fatal Error Codes
E8h
1 1 1
E9h
1 1 1
EAh
1 1 1
EBh
1 1 1
EDh
1 1 1
124
Lower Nibble
2h 1h 8h 4h 2h
#5 #4 #3 #2 #1
1 1 1 0
1 1 1 1
Table 64. POST Progress LED Codes
Lower Nibble
2h 1h 8h 4h 2h
#5 #4 #3 #2 #1
0 1 0 0
0 1 0 0
0 1 0 1
0 1 0 1
0 1 1 0
LSB
1h
#0
0 Program RAS configuration
1 MRC is done
LSB
1h
#0
No usable memory error
01h = No memory was detected from the SPD read, or invalid config that
causes no operable memory.
0
02h = Memory DIMMs on all channels of all sockets are disabled due to
hardware memtest error.
3h = No memory installed. All channels are disabled.
Memory is locked by Intel
1
inaccessible
DDR4 channel training error
01h = Error on read DQ/DQS (Data/Data Strobe) init
0 02h = Error on Receive Enable
3h = Error on Write Leveling
04h = Error on write DQ/DQS (Data/Data Strobe
Memory test failure
01h = Software memtest failure.
02h = Hardware memtest failed.
1
03h = Hardware Memtest failure in Lockstep Channel mode requiring a
channel to be disabled. This is a fatal error which requires a reset and
calling MRC with a different RAS mode to retry.
DIMM configuration population error
1
01h = Different DIMM types (UDIMM, RDIMM, LRDIMM) are detected
installed in the system.
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