Technical Product Specification

Intel® Server Board S2600IP and Intel® Workstation Board W2600CR TPSAppendix D: POST Code Diagnostic LED Decoder
Revision 1.4 Intel order number G34153-004 155
Note: Diagnostic LEDs are best read and decoded when viewing the LEDs from the back of the
system
Table 82. 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
The following table provides a list of all POST progress codes.
Table 83. POST 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
SEC Phase
01h
0
0
0
0
0
0
0
1
First POST code after CPU reset
02h
0
0
0
0
0
0
1
0
Microcode load begin
03h
0
0
0
0
0
0
1
1
CRAM initialization begin
04h
0
0
0
0
0
1
0
0
Pei Cache When Disabled
05h
0
0
0
0
0
1
0
1
SEC Core At Power On Begin.
06h
0
0
0
0
0
1
1
0
Early CPU initialization during Sec Phase.
07h
0
0
0
0
0
1
1
1
Early SB initialization during Sec Phase.
08h
0
0
0
0
1
0
0
0
Early NB initialization during Sec Phase.
09h
0
0
0
0
1
0
0
1
End Of Sec Phase.
0Eh
0
0
0
0
1
1
1
0
Microcode Not Found.
0Fh
0
0
0
0
1
1
1
1
Microcode Not Loaded.
PEI Phase
10h
0
0
0
1
0
0
0
0
PEI Core
11h
0
0
0
1
0
0
0
1
CPU PEIM
15h
0
0
0
1
0
1
0
1
NB PEIM
19h
0
0
0
1
1
0
0
1
SB PEIM
MRC Process Codes – MRC Progress Code Sequence is executed - See Table 83.
PEI Phase continued…
31h
0
0
1
1
0
0
0
1
Memory Installed
32h
0
0
1
1
0
0
1
0
CPU PEIM (Cpu Init)
33h
0
0
1
1
0
0
1
1
CPU PEIM (Cache Init)
34h
0
0
1
1
0
1
0
0
CPU PEIM (BSP Select)
35h
0
0
1
1
0
1
0
1
CPU PEIM (AP Init)
36h
0
0
1
1
0
1
1
0
CPU PEIM (CPU SMM Init)
4Fh
0
1
0
0
1
1
1
1
Dxe IPL started
DXE Phase
60h
0
1
1
0
0
0
0
0
DXE Core started
61h
0
1
1
0
0
0
0
1
DXE NVRAM Init
62h
0
1
1
0
0
0
1
0
SB RUN Init