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Very-large-scale integration (VLSI) is the process of creating an integrated circuit (IC) by combining millions or billions of MOS transistors onto a single chip. VLSI began in the 1970s when MOS integrated circuit (metal oxide semiconductor) chips were developed and then widely adopted, enabling complex semiconductor and telecommunications technologies.
The VLSI Project was a DARPA-program initiated by Robert Kahn in 1978 [1] that provided research funding to a wide variety of university-based teams in an effort to improve the state of the art in microprocessor design, then known as Very Large Scale Integration (VLSI).
He first wrote a paper on ways to improve microcoding, but later changed his mind and decided microcode itself was the problem. With funding from the DARPA VLSI Program, Patterson started the Berkeley RISC effort. The Program, practically unknown today, led to a huge number of advances in chip design, fabrication, and even computer graphics.
The advantages of HLLCAs can be alternatively achieved in HLL Computer Systems (language-based systems) in alternative ways, primarily via compilers or interpreters: the system is still written in a HLL, but there is a trusted base in software running on a lower-level architecture. This has been the approach followed since circa 1980: for ...
In computer engineering, a hardware description language (HDL) is a specialized computer language used to describe the structure and behavior of electronic circuits, usually to design application-specific integrated circuits (ASICs) and to program field-programmable gate arrays (FPGAs).
The earliest EDA tools were produced academically. One of the most famous was the "Berkeley VLSI Tools Tarball", a set of UNIX utilities used to design early VLSI systems. Widely used were the Espresso heuristic logic minimizer, [6] responsible for circuit complexity reductions and Magic, [7] a computer-aided design
The first documented computer architecture was in the correspondence between Charles Babbage and Ada Lovelace, describing the analytical engine.While building the computer Z1 in 1936, Konrad Zuse described in two patent applications for his future projects that machine instructions could be stored in the same storage used for data, i.e., the stored-program concept.
It was also the last PDP–11 system architecture created by Digital Equipment Corporation, later models were VLSI chip realizations of the existing system architectures. PDP–11/24 – 1979. [15] First VLSI PDP–11 for Unibus, using the "Fonz-11" (F11) chip set with a Unibus adapter. PDP–11/84 – 1985–1986. [15]