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Verilator is now used within academic research, open source projects and for commercial semiconductor development. It is part of the growing body of free electronic design automation (EDA) software. It is free and open-source software released under a GNU Lesser General Public License (LGPL) 3.0 only, or an Artistic License 2.0.
SPICE, Verilog, Spectre netlists; plug-ins: Ngspice: n/a 2024 Windows, macOS, Linux Backend simulator for Altium Designer, Eagle, KiCad, Qucs-S [15] SPICE [16] UC Berkeley: 1993 Source-only End-of-life, no longer updated; historically important, because many analog simulators are based on this project Xyce [17] Sandia National Laboratories: 2023
In 2003, ModelSim 5.8 was the first simulator to begin supporting features of the Accellera SystemVerilog 3.0 standard. [1] In 2005 Mentor introduced Questa to provide high performance Verilog and SystemVerilog simulation and expand Verification capabilities to more advanced methodologies such as Assertion Based Verification and Functional ...
As of release 0.9, Icarus is composed of a Verilog compiler (including a Verilog preprocessor) with support for plug-in backends, and a virtual machine that simulates the design. To view waveforms, a program like GTKWave can be used. Release v10.0, besides general improvements and bug fixes, added preliminary support for VHDL, but the VHDL ...
GPL-2.0-or-later: Verilog simulator Verilator: Posix: LGPL-3.0-only or Artistic-2.0: Verilator is the fastest free Verilog HDL simulator. It compiles synthesizable Verilog into cycle accurate C++ or SystemC code following 2-state synthesis (zero delay) semantics.
Verilog was later submitted to IEEE and became IEEE Standard 1364-1995, commonly referred to as Verilog-95. In the same time frame Cadence initiated the creation of Verilog-A to put standards support behind its analog simulator Spectre. Verilog-A was never intended to be a standalone language and is a subset of Verilog-AMS which encompassed ...
Register-transfer-level abstraction is used in hardware description languages (HDLs) like Verilog and VHDL to create high-level representations of a circuit, from which lower-level representations and ultimately actual wiring can be derived. Design at the RTL level is typical practice in modern digital design.
The Wishbone Bus is used by many designs in the OpenCores project. Wishbone is intended as a "logic bus". It does not specify electrical information or the bus topology. Instead, the specification is written in terms of "signals", clock cycles, and high and low levels. This ambiguity is intentional.