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A synthesizable CPU core, it was for many years maintained by developers at OpenCores.org, although, since 2015, that activity has now been taken over by the Free and Open Source Silicon Foundation at the librecores.org website. The Verilog RTL description is released under the GNU Lesser General Public License (LGPL).
The 74S181 4-bit ALU bitslice resting on a page from the datasheet The 74181 is a 4-bit slice arithmetic logic unit (ALU), implemented as a 7400 series TTL integrated circuit . Introduced by Texas Instruments in February 1970, [ 1 ] it was the first complete ALU on a single chip. [ 2 ]
OpenSPARC is an open-source hardware project, started in December 2005, for CPUs implementing the SPARC instruction architecture. The initial contribution to the project was Sun Microsystems' register-transfer level (RTL) Verilog code for a full 64-bit, 32-thread microprocessor, the UltraSPARC T1 processor.
Verilog-to-Routing (VTR) is an open source CAD flow for FPGA devices. [1] [2] [3] VTR's main purpose is to map a given circuit described in Verilog, a hardware description language, on a given FPGA architecture for research and development purposes; the FPGA architecture targeted could be a novel architecture that a researcher wishes to explore, or it could be an existing commercial FPGA whose ...
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Backend simulator for Altium Designer, Eagle, KiCad, Qucs-S [15] SPICE [16] UC Berkeley: 1993 Source-only End-of-life, no longer updated; historically important, because many analog simulators are based on this project Xyce [17] Sandia National Laboratories: 2023
This improvement overcomes long floating point delays and memory accesses. In particular the algorithm is more tolerant of cache misses. Additionally, programmers are freed from implementing optimized code. This is a result of the common data bus and reservation station working together to preserve dependencies as well as encouraging concurrency.
Verilog AUTOs – An open source meta-comment system to simplify maintaining Verilog code; Online Tools. EDA Playground – Run SystemVerilog from a web browser (free online IDE) sverule – A SystemVerilog BNF Navigator (current to IEEE 1800-2012) Other Tools. SVUnit – unit test framework for developers writing code in SystemVerilog. Verify ...