KF8255 - 8255-like programmable peripheral interface written in SystemVerilog About KF8255 is programmable peripheral interface like 8255/8255A. Differences from original Clock synchronization I/O ports is separated into input and output port Features 3 I/O (Port A, PortB, Port C) Mode 0: Basic Input/Output Mode 1: Storobed Input/Output Mode 2: Bi-Directional Bus Block