post4dby Add Komoncharoensiri, Director of Technical Services at 4D Inc. Here we go with another set of tips and tricks. The 4D Knowledge Base is a library of information about 4D technology where weekly tech tips and monthlyPCI POST Code Display POST4D During the Power On Self-Test (POST), most PC BIOS write diagnostic codes to port 80h or 84 (jumper selection). Use POST4D to display these codes on