Table 9. Post Progress Code Led; Table 10. Diagnostic Led Post Code - Intel SR1630BC - Server System - 0 MB RAM Service Manual
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Upper nibble bits = 1010b = Ah; Lower nibble bits = 1100b = Ch; the two are
concatenated as ACh.
Checkpoint
MSB
8h
LED
#7
Host Processor
0x10h
X
0x11h
X
0x12h
X
0x13h
X
0x14h
X
0x15h
X
76
Table 9. POST Progress Code LED Example
Upper Nibble LEDs
MSB
LEDs
LED
#7
8h
Status
ON
Results
1
Table 10. Diagnostic LED POST Code Decoder
Diagnostic LED Decoder
O = On, X = Off
Upper Nibble
4h
2h
1h
#6
#5
#4
X
X
O
X
X
O
X
X
O
X
X
O
X
X
O
X
X
O
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
X
X
X
X
X
X
X
O
X
X
O
X
X
X
O
O
X
O
X
X
X
O
X
O
Intel® Server System SR1630BC Service Guide
Lower Nibble LEDs
LED
LED
#3
#2
#1
8h
4h
2h
OFF
ON
1
0
Ch
Description
#0
Power-on initialization of
the host processor
(bootstrap processor)
Host processor cache
initialization (including AP)
Starting application
processor initialization
SMM initialization
Selection of Processor
with least feature use as
Boot Strap Processor
Switch an AP processor to
become the new Boot
Strap Processor
LSB
LED
#0
1h
OFF
0
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