Intel D5400XS Product Guide - Page 72
Port 80h POST Codes, POST Code Indicators
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Intel Desktop Board D5400XS Product Guide Port 80h POST Codes During the POST, the BIOS generates diagnostic progress codes (POST codes) to I/O port 80h. If the POST fails, execution stops and the last POST code generated is left at port 80h and displayed on the Desktop Board's seven-segment LED display shown in Figure 29. This code is useful for determining the point where an error occurred during the POST. Figure 29. POST Code Indicators 72
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Intel Desktop Board D5400XS Product Guide
72
Port 80h POST Codes
During the POST, the BIOS generates diagnostic progress codes (POST codes) to I/O
port 80h.
If the POST fails, execution stops and the last POST code generated is left
at port 80h and displayed on the Desktop Board’s seven-segment LED display shown
in Figure 29.
This code is useful for determining the point where an error occurred
during the POST.
Figure 29.
POST Code Indicators