MiniPCI POST code display card POST.5A with test pins
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miniPCI format to fit WRAP boards and most modern notebook PCs. During power on self-test (POST), most PC BIOSes will write diagnostic codes to port 80h or port 84h (auto select, whichever is written first). Use post5a to display these codes on a dual digit LED display. Additional LEDs indicate the status of the power supply rails.