Penguin Computing Relion 1900e, Technical Manual

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135 Revision 1.3
Relion 1900e/2900e Manual
In the following example, the BIOS sends a value of ACh to the diagnostic LED decoder. The LEDs are
decoded as follows:
Note: Diag LEDs are best read and decoded when viewing the LEDs from the back of the system
Table 60. POST Progress Code LED Example
LEDs
Upper Nibble AMBER LEDs Lower Nibble GREEN LEDs
MSB LSB
LED #7 LED #6 LED #5 LED #4 LED #3 LED #2 LED #1 LED #0
8h 4h 2h 1h 8h 4h 2h 1h
Status ON OFF ON OFF ON ON OFF OFF
Results
1 0 1 0 1 1 0 0
Ah Ch
Upper nibble bits = 1010b = Ah; Lower nibble bits = 1100b = Ch; the two are concatenated as ACh
Early POST Memory Initialization MRC Diagnostic Codes
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.
The MRC Progress Codes are displayed to the Diagnostic LEDs that show the execution point in the MRC
operational path at each step.
Table 61. MRC Progress Codes
Checkpoint
Diagnostic LED Decoder
Description
1 = LED On, 0 = LED Off
Upper Nibble
Lower Nibble
MSB LSB
8h 4h 2h 1h 8h 4h 2h 1h
LED #7 #6 #5 #4 #3 #2 #1 #0
MRC Progress Codes
B0h
1 0 1 1 0 0 0 0 Detect DIMM population
B1h 1 0 1 1 0 0 0 1 Set DDR3 frequency
B2h 1 0 1 1 0 0 1 0 Gather remaining SPD data
B3h 1 0 1 1 0 0 1 1 Program registers on the memory controller level
B4h 1 0 1 1 0 1 0 0 Evaluate RAS modes and save rank information
B5h 1 0 1 1 0 1 0 1 Program registers on the channel level
B6h 1 0 1 1 0 1 1 0 Perform the JEDEC defined initialization sequence
B7h 1 0 1 1 0 1 1 1 Train DDR3 ranks
B8h 1 0 1 1 1 0 0 0 Initialize CLTT/OLTT
B9h 1 0 1 1 1 0 0 1 Hardware memory test and init
BAh 1 0 1 1 1 0 1 0 Execute software memory init
BBh 1 0 1 1 1 0 1 1 Program memory map and interleaving
BCh 1 0 1 1 1 1 0 0 Program RAS configuration
BFh 1 0 1 1 1 1 1 1 MRC is done