Table 13. Post Progress Code Led Example; Table 14. Diagnostic Led Post Code Decoder - Intel SR1695GPRX Service Manual

•
Upper nibble bits = 1010b = Ah; Lower nibble bits = 1100b = Ch; the two are
concatenated as ACh.
Checkpoint
MSB
8h
LED #7
Host Processor
0x04h 0
0x10h 0
0x11h 0
0x12h 0
0x13h 0
144

Table 13. POST Progress Code LED Example

Upper Nibble LEDs
MSB
LEDs
LED
#7
8h
Status ON
Results 1

Table 14. Diagnostic LED POST Code Decoder

Diagnostic LED Decoder
1 = On, 0= Off
Upper Nibble
4h 2h 1h
#6 #5 #4
0 0 0
0 0 1
0 0 1
0 0 1
0 0 1
LED LED LED LED
#6 #5 #4
4h 2h 1h
OFF ON OFF ON
0 1 0 1
Ah
Lower Nibble
LSB
8h 4h 2h 1h
#3 #2 #1
0 1 0 0
0 0 0 0
0 0 0 1
0 0 1 0
0 0 1 1
®
Intel Server System SR1695GPRX Service Guide
Lower Nibble LEDs
LED LED
#3 #2 #1
8h 4h 2h
ON OFF
1 0
Ch
Description
#0
Early processor
initialization (flat32.asm)
where system BSP is
selected
Power-on initialization of
the host processor
(bootstrap processor)
Host processor cache
initialization (including AP)
Starting application
processor initialization
SMM initialization
LSB
LED
#0
1h
OFF
0