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Icarus Verilog is an implementation of the Verilog hardware description language compiler that generates netlists in the desired format and a simulator. It supports the 1995, 2001 and 2005 versions of the standard, portions of SystemVerilog , and some extensions.
The original Verilog simulator, Gateway Design's Verilog-XL was the first (and only, for a time) Verilog simulator to be qualified for ASIC (validation) sign-off. After its acquisition by Cadence Design Systems, Verilog-XL changed very little over the years, retaining an interpreted language engine, and freezing language-support at Verilog-1995.
An example op-amp circuit drawn with Klunky and GIMP. Klunky can be used to draw basic circuits, and then a raster editing program like GIMP to modify the screenshots. The Klunky program is public domain, and he has enhanced it with additional components, etc. (See User:Omegatron#Electronics_diagrams. Enhanced version is here.) Advantages
Verilog-2001 is a significant upgrade from Verilog-95. First, it adds explicit support for (2's complement) signed nets and variables. Previously, code authors had to perform signed operations using awkward bit-level manipulations (for example, the carry-out bit of a simple 8-bit addition required an explicit description of the Boolean algebra ...
I am no Verilog Expert, and don't pretend to be one. It truelly sucks to see the simulators arranged alphabetically. "important" to the industry should be the main factor, and 'year entering market' should be the second. It really sucks to see Verilog-XL buried at the end of the list,
Flow to HDL tools and methods convert flow-based system design into a hardware description language (HDL) such as VHDL or Verilog.Typically this is a method of creating designs for field-programmable gate array, application-specific integrated circuit prototyping and digital signal processing (DSP) design.
Poison Profits. A HuffPost / WNYC investigation into lead contamination in New York City
Verilator is a free and open-source software tool which converts Verilog (a hardware description language) to a cycle-accurate behavioral model in C++ or SystemC.The generated models are cycle-accurate and 2-state; as a consequence, the models typically offer higher performance than the more widely used event-driven simulators, which can model behavior within the clock cycle.