post4d5V PCI interface (not compatible with ALIX.1C ALIX.1D). During power on self-test (POST), most PC BIOSes will write diagnostic codes to port 80h or port 84h (jumper selection). Use post4dpost4d PCI POST code display; Status EOL, available while supplies last. Part numbers post4d = PCI POST code display, RoHS compliant Use with postrd: Spec 5V PCI interface (not