Table 28. Mrc Progress Codes - Intel R1000GZ Technical Product Specification

POST Memory Initialization MRC Diagnostic Codes
There are two types of POST Diagnostic Codes displayed by the MRC during memory initialization; Progress
Codes and Fatal Error Codes.
The MRC Progress Codes are displays to the Diagnostic LEDs that show the execution point in the MRC
operational path at each step.
Diagnostic LED Decoder
1 = LED On, 0 = LED Off
Upper Nibble
Checkpoint
MSB
8h 4h 2h 1h 8h 4h 2h 1h
LED #7 #6 #5 #4 #3 #2 #1
MRC Progress Codes
B0h 1
B1h 1
B2h 1
B3h 1
B4h 1
B5h 1
B6h 1
B7h 1
B8h 1
B9h 1
BAh 1
BBh 1
BCh 1
BFh 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.
58
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Intel Server System R1000GZ/GL Product Family TPS

Table 28. MRC Progress Codes

Lower Nibble
LSB
#0
0 1 1 0 0 0
0 1 1 0 0 0
0 1 1 0 0 1
0 1 1 0 0 1
0 1 1 0 1 0
0 1 1 0 1 0
0 1 1 0 1 1
0 1 1 0 1 1
0 1 1 1 0 0
0 1 1 1 0 0
0 1 1 1 0 1
0 1 1 1 0 1
0 1 1 1 1 0
0 1 1 1 1 1
Revision 1.1
Description
0 Detect DIMM population
1 Set DDR3 frequency
0 Gather remaining SPD data
1 Program registers on the memory controller level
0 Evaluate RAS modes and save rank information
1 Program registers on the channel level
0 Perform the JEDEC defined initialization sequence
1 Train DDR3 ranks
0 Initialize CLTT/OLTT
1 Hardware memory test and init
0 Execute software memory init
1 Program memory map and interleaving
0 Program RAS configuration
1 MRC is done