Intel SR1695GPRX, Service Manual

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144 Intel
®
Server System SR1695GPRX Service Guide
•
Upper nibble bits = 1010b = Ah; Lower nibble bits = 1100b = Ch; the two are
concatenated as ACh.
Table 13. POST Progress Code LED Example
LEDs
Upper Nibble LEDs Lower Nibble 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
Table 14. Diagnostic LED POST Code Decoder
Diagnostic LED Decoder
Checkpoint 1 = On, 0= Off
Description
Upper Nibble Lower Nibble
MSB LSB
8h 4h 2h 1h 8h 4h 2h 1h
LED #7 #6 #5 #4 #3 #2 #1 #0
Host Processor
0x04h 0 0 0 0 0 1 0 0 Early processor
initialization (flat32.asm)
where system BSP is
selected
0x10h 0 0 0 1 0 0 0 0 Power-on initialization of
the host processor
(bootstrap processor)
0x11h 0 0 0 1 0 0 0 1 Host processor cache
initialization (including AP)
0x12h 0 0 0 1 0 0 1 0 Starting application
processor initialization
0x13h 0 0 0 1 0 0 1 1 SMM initialization