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Error Messages and Indicators
71
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 26. This code is useful for determining the point where an error occurred
during the POST.
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 26. This code is useful for determining the point where an error occurred
during the POST.
Figure 26. POST Code LED Display