Table 55. Post Progress Code Led Example - Intel S5500WB Technical Product Specification

Intel® Server Board S5500WB TPS
In the following example, the BIOS sends a value of ACh to the diagnostic LED decoder. The
LEDs are decoded as follows:
MSB
LEDs
LED #7
8h
Status ON
1
Results
Upper nibble bits = 1010b = Ah; Lower nibble bits = 1100b = Ch; the two are concatenated
as ACh.
Revision 1.3

Table 55. POST Progress Code LED Example

Upper Nibble LEDs
LED #6 LED #5
4h 2h
OFF ON
0 1
Ah
Intel order number E53971-004
Appendix A: POST Code LED Decoder
LED #4 LED #3
1h 8h
OFF ON
0 1
Lower Nibble LEDs
LED #2 LED #1
4h 2h
ON OFF
1 0
Ch
LSB
LED #0
1h
OFF
0
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