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Assembly Language or Machine Code ?

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작성자 Lavern
댓글 0건 조회 173회 작성일 24-09-13 16:32

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It used numbering base of ten, perforated cards and 17 474 vacuum tubes at 100 Kilohertz, consuming 150 Kilowatt for operation, plus the consumption of the refrigeration system (necessary to extract the heat generated by the vacuum tubes), programmable by hardware connections. Even before the ANSI Basic of 1978, there were already almost 100 dialects (most of them based on Darmouth Basic 6 of 1971). Some of those dialects are very weak, while others are very powerful. In terms of traffic (packet exchange) the Web overpassed FTP, Gopher and most other Internet protocols about 1995, but as of 2016 there are still about a hundred active Gopher servers. The experiment is a success, but it shows that available telephone lines are still inadequate, confirming Leonard Kleinrock's proposal for packet interchange instead of circuits. This kind of computers are called "of first generation", which predominated from the 1940's to the 1950's. John Von Neumann developed between 1945 and 1950 the theory of logic circuits (also called "Von Neumann Architecture"), in collaboration with Burks and Goldstine. Used in common calculators, the Intel 4004 was composed of 2 250 elements that if connected to other four integrated circuits gave a microcomputer of power comparable to the big computers of the mid 1950's, capable of adding two numbers of 4 bits in 11 microseconds.



In one of the big computers of the Massachussetts Institute of Technology, they emulated the Intel 8080 microprocessor that had been incorporated in the Altair 8800 microcomputer. 1944-1950: Whirlwind, digital computer by Jay Forrester (Massachussetts Institute of Technology), first computer operable in real time. The 80286 introduced the Protected Mode of operation, as opposed to the Real Mode that the earlier models used. The EDVAC definitely introduced the concept of stored code in computer programming. 1949: Short Order Code, by Mandy (Univac), first scientific programming language. Fifteen Univac I were built. In 1951 those modifications were released in a new model renamed UNIVAC I, what is billiards Universal Automatic Computer I (see further below). 1947-1951: UNIVAC I, Universal Automatic Computer I, by Presper Eckert with John Mauchly (Sperry Rand), in collaboration with John Von Neumann, marketed by the Univac Division of Remington Rand. 1948-1951: EDVAC, Electronic Discrete Variable Automatic Computer, electronic digital computer using numbering base of two, perforated cards and vacuum tubes, by Presper Eckert with John Mauchly and in collaboration with John Von Neumann. This project was modified by Eckert and Mauchly in order to accept big format magnetic tapes instead of perforated paper tapes, and for building it of transistors instead of vacuum tubes.



Successful with a few big corporations, research institutions or government agencies that could afford its price, the IBM 701 inaugurated a kind of electronic digital computers serially built and commercially marketed, which used transistors, perforated cards or paper tapes for input or output, and big format magnetic tapes for internal storage. 1985: NFSnet (National Science Foundation), led by Dennis Jennings in 1985 and by Steve Wolff in 1986, made inter-operability with the Internet of DARPA (managed by the Internet Activities Board), extended TCP/IP, distributed costs for development and maintenance to other North American organisations, and helped to form a Federal Networking Council as a coordinator with international organisations (such as R. A. R. E. in Europe) through the Intercontinental Research Committee. Claude Shannon greatly influenced further development of computers using numbering base of two, and definitely provoked the demise of the numbering base of ten for nearly all advanced computers. 1961: field effect transistor by Steven Hofstein, that made possible the development of MOS transistor (Metallic Oxid Semiconductor) by R. C. A. July 1961: essay on the theory of packet interchange for computer networks, by Leonard Kleinrock (Massachussets Institute of Technology).



1953: magnetic memory, by Jay Forrester (Massachussetts Institute of Technology). 1948: A Mathematical Theory of Communication, essay explaining how to apply the numbering base of two to computers, by Claude Shannon (Massachussetts Institute of Technology). It only accepted code in numbering base of two, and was sold just as paper plans, without physical parts. 1943: Z-4, partly electro-mechanic and partly electronic computer using magnetic relais and some vacuum tubes, of numbering base of two, by Konrad Zuse with Helmut Schreyer. 1941: Z-3, partly electro-mechanic and partly electronic computer using magnetic relais and some vacuum tubes, of numbering base of two, by Konrad Zuse with Helmut Schreyer. OMS: a programming language for data banks used from the 1960's to the 1980's. Pascal: named in honour to Blaise Pascal (1623-1662), who in 1642-1647 built some units of the "Pascaline", machine of pinion wheels for adding, using numbering base of ten. Basic belonged to this category until 1976, when Steve Garland modified Dartmouth Basic 6 to facilitate structured modular programming in connected blocks, thus he created SBasic, a precompiler that produced Dartmouth Basic 6 output and that formed the basis of ANSI Basic. In 1994 Microsoft released Visual Basic for DOS.

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