The Verilog PLI handbook. A user’s guide and comprehensive reference on the verilog programming language interface. This book attempts to be a “bible” on the Programming Language Interface (PLI) for the Verilog hardware description language. Verilog is one of the two (second is VHDL) most popular HDL’s. The Verilog language has been standardized by IEEE (# 1364-1995). Verilog provides a means of specifying a digital system at behavioral and structural levels of abstraction. It has been instrumental in providing consistency across diverse tools-fault simulators, timing analyzers, behavioral and logic synthesis as well as design specification. PLI allows users and Verilog application developers to extend the capabilities of the Verilog language and the Verilog simulator.