IBM 1620 - IBM 1620 The IBM 1620 was introduced by IBM in 1959 and marketed as an inexpensive "Scientific Computer". Modified versions of the 1620 were used as the CPU of the IBM 1710 and IBM 1720 Industrial Process Control Systems. Table of contents showTocToggle("show","hide") 1 The 1620's Architecture 1.1 Hardware 2 Development History 2.2 Implementation "Levels" of the IBM 1620 2.3 Patents 3.
IBM 1620 Model I - IBM 1620 Model I The IBM 1620 Model I was the original implementation of the IBM 1620 scientific computer, introduced in 1959. This unit (commonly called "1620" until the Model II was introduced) was produced as inexpensively as IBM could make it, in order to keep the price low. One industry magazine (Datamation) mentioned that the 1620 was the first IBM computer for which the basic system could be leased for a monthly rate less than its number :-) It did not even have conventional ALU hardware: all arithmetic was done by table lookup in core memory. Addition and Subtraction used a 100 digit table (@ address 00300..00399). Multiplication used a 200 digit table (@ address 00100..00299). In the basic machine division used software subroutines, but.
IBM 1620 Model II - IBM 1620 Model II The IBM 1620 Model II (commonly called simply the Model II) was a vastly improved implementation, compared to the original Model I, of the IBM 1620 scientific computer architecture. It had basic ALU hardware for addition and subtraction, but multiplication was still done by table lookup in Core memory. Multiplication used a 200 digit table (@ address 00100..00299). Rather than being an available option, as in the Model I, the Divide hardware using a repeated Subtraction algorithm, was built in. Floating Point arithmetic was an available option, as were Octal arithmetic and logic instructions. The Core memory (@ address 00300..00399) that was freed by the replacement of the Addition table with hardware was used for storage of two selectable "bands" of seven.
IBM 1710 - IBM 1710 The IBM 1710 was a Process Control system that IBM marketed in the 1960s. It used either a 1620 I or a 1620 II Computer and specialized I/O devices (e.g., A/D Converter, D/A Converter, Discrete I/O, factory floor operator control panels). The IBM 1620 used in the 1710 system was modified in several ways, the most obvious was the addition of a very primitive hardware interrupt mechanism. The 1710 was used by many paper mills and oil refineries..
IBM Executive series typewriter - IBM Executive series typewriter The IBM Executive series typewriter was a series of electric typewriters that IBM manufactured, starting in the 1950s. They used the conventional moving carriage and hammer mechanism. Two models of the series were introduced in the 1950s: IBM Executive Model A IBM Executive Model B One model of the series was introduced in the early 1960s: IBM Executive Model C One model of the series was introduced in the early 1970s: IBM Executive Model D Modified versions of the A, B, and C models were commonly used as "console typewriters" or terminals on many early computers (e.g., JOHNNIAC, IBM 1620, PDP-1)..
List of IBM products - List of IBM products Table of contents showTocToggle("show","hide") 1 Keypunches and Verifiers 2 Unit Record Equipment 3 Calculating Devices 4 Computer hardware 4.1 Peripherals 4.2 Tubes (1950s) 4.3 Transistors (1960s) 4.4 Integrated Circuits (1964 to present) 5 Typewriters 6 Software Keypunches and Verifiers IBM 1 - Mechanical punch IBM 11 - Electric punch IBM 15 - Motorized punch IBM 16 - Motorized duplicating punch IBM 24 - Electronic (tube) punch non-printing IBM 26 - Electronic (tube) punch printing, BCD zone codes IBM 29 - Transistorized punch printing, EBCDIC zone codes IBM 51 - Mechanical verifier IBM 52 - Motorized verifier IBM 56 - Verifier IBM 59 - Verifier IBM 129 - Integrated circuits punch printing IBM 524 - Electronic (tube) verifier IBM 526 - Electronic (tube) summary.
System/360 - is a computer system family announced by IBM on April 7 1964. Unlike most systems, IBM created an entire line of computers (or CPUs) from small to large, all running the same command set. This allowed the customers to use a low-cost version of the family, and upgrade to larger systems if their needs grew. Some models (e.g., the 360/30) even offered the option of microcode emulation of the customer's previous computer (e.g., the IBM 1401, or the IBM 1620) so that old programs could still be run on the new machine. This flexibility greatly lowered barriers to entry. With other machines you had the choice between being able to afford a machine that might not have the power you needed, or instead purchasing one that guaranteed the power but cost.
List of Intel microprocessors - World's first microprocessor Used in Busicom calculator Trivia: The original goal was to equal the clock speed of the IBM 1620; this was not quite met. 4040 Introduced TBD, 1974 Clock speed 740KHz 0.06 MIPS Bus Width 4 bits (multiplexed address/data due to limited pins) PMOS Number of Transistors 3,000 at 10 microns Addressable Memory 640 bytes Program Memory 8K bytes Interrupts Enhanced version of 4004 8008 Introduced April 1, 1972 Clock speed 500KHz (8008-1: 800KHz) 0.05 MIPS Bus Width 8 bits (multiplexed address/data due to limited pins) PMOS Number of Transistors 3,500 at 10 microns Addressable memory 16 kilobytes Typical in dumb terminals, general calculators, bottling machines Developed in tandem with 4004 Originally intended for use in the Datapoint 2200 8080 Introduced April 1, 1974 Clock speed 2MHz 0.64 MIPS.
IBM - IBM The IBM Logo International Business Machines Corporation (IBM, or colloquially, Big Blue) is headquartered in Armonk, New York, USA. The company manufactures and sells computer hardware, software and services. With its 316,000 employees worldwide and revenues of $81 billion (figures from 2002), it is the largest information technology company in the world, and one of the few with a continuous history spanning the 19th, 20th, and 21st centuries. It has consultants in over 160 countries, development labs located all over the world, and eight research labs located throughout the Northern Hemisphere, with half of those researchers based outside of the United States. It has a major presence in virtually every segment of information technology, from mainframe computers (where it has had market dominance for decades).
IBM mainframe - IBM mainframe In the early years (1950-1965) IBM made many models of mainframes, many of which were incompatible with each other. It had two main lines of models: one for commercial or data processing use, and another one for engineering and scientific use. The two lines were largely incompatible. This all changed with the introduction of the System/360 in April of 1964. The System/360 was a single series of models, compatible with one another, for both commercial and scientific use. The System/360 later evolved into the System/370, the System/390 and most recently the zSeries. System/360 (the "all-around computer system") incorporated into a single architecture features which had previously been present on only the commercial (decimal arithmetic, for example, or byte addressing) or the technical (floating point.
IBM minicomputers - IBM minicomputers IBM has made several models of minicomputers over the years: the System 34, System 36, System 38, and finally AS/400 (recently rechristened the iSeries). They have also made some more minor models (details?). (Mention the failed project before release of AS/400?). See also: IBM mainframes, List of IBM products.
IBM PC - IBM PC The IBM PC (Personal Computer) is a trade mark of IBM. Due to the success of the IBM PC, the generic term Personal Computer became common for all microcomputers compatible with IBM's specification (see IBM PC compatible). The term is sometimes extended to mean all microcomputers. For a discussion of generic "Personal Computers", see personal computer. For details of the first generation of microcomputers that largely died out with the Personal Computer revolution, see home computers. Table of contents showTocToggle("show","hide") 1 The IBM PC Concept 2 Commercial Success 3 IBM PC Models 4 Technology 4..1 Electronics 4..2 Keyboard 4..3 Character set 4..4 Storage media 4.1 Software 5 IBM PC and PS/2 models 6 See also 7.
IBM 3270 - IBM 3270 The IBM 3270 is a class of terminals made by IBM (known as "Display Devices") normally used to talk to IBM mainframes. The 3270 attempts to minimise the number of I/O interrupts required by accepting large blocks of data, known as datastreams, in which both text and control (or formatting functions) are interspersed allowing an entire screen to be "painted" as a single output operation. The concept of "formatting" in these devices allows the screen to be divided into clusters of contiguous character cells for which numerous attributes (colour, highlighting, character set, protection from modification) can be set. Further, using a technique known as 'Read Modified' the changes from any number of formatted fields that have been modified can be read as a single.
IBM PC keyboard - IBM PC keyboard Keyboards for the IBM PC are standardized. However during the 20 years of the PC architecture being constantly updated as well several types of keyboards have been developed. They all utilise the QWERTY layout. 83-Key PC/XT Keyboard Layout 84-Key AT Keyboard Layout 101-Key "Enhanced" Keyboard Layout - additional navigation and control keys 102-Key "Enhanced" Keyboard Layouts - additional key to the left to the key) 104-Key "Windows" Keyboard Layout - Windows and menu key added 107-Key "Enhanced" Keyboard Layout - Wake, Sleep, and Power keys added (for power management) There are three types of connectors used to connect the keyboards the main unit The first two are: 5-pin DIN (DIN 41524, "AT") connector 6-pin "mini-DIN" (DIN 45322, "PS/2") connector. They are physically different.
IBM PC compatible - IBM PC compatible IBM PC compatible refers to a class of computers which make up the vast majority of smaller computers (microcomputers) on the market today. They are based (without IBM's participation) on the original IBM PC. They use the Intel x86 architecture and are capable of using interchangable commodity hardware. The origins of this platform came with the decision by IBM in 1981 to market a personal computer as quickly as possible in response to Apple Computer's rapid success (50% marketshare) in the burgeoning PC market. In licensing an operating system from Microsoft, IBM's agreements allowed Microsoft to sell MSDOS for non-IBM platforms (the IBM version was called PC-DOS). Also, in creating the platform, IBM used only one proprietary component: the BIOS. Columbia produced the.
IBM Selectric typewriter - IBM Selectric typewriter The IBM Selectric typewriter (occasionally known as the IBM Golfball typewriter) is the electric typewriter design that brought the typewriter into the electronic age. Selectric I Selectric II Instead of typebars it had a pivoting typeball that could be changed to use different fonts in the same document. The ability to change fonts, combined with the neat regular appearance of the typed page, was revolutionary and marked the beginning of desktop publishing. Later models with selective pitch and built-in correcting tape carried the trend even further. Any typist could produce a polished manuscript. Due to their speed (14.8 characters/sec), immunity to clashing typebars, and reliability, Selectric models were also widely used as terminals for computers, replacing Teletypes. The machine had a key lockout.
IBM POWER - IBM POWER POWER is a RISC CPU architecture designed at IBM. The name, arguably, stands for Performance Optimization With Enhanced RISC. POWER series CPUs are used as the main CPU in many of IBM's servers, minicomputers, workstations, and supercomputers. The POWER architecture was used to develop (and remains very similar to) the PowerPC architecture, used in all Apple Macintosh computers, some IBM workstations, as well as a number of embedded applications. The POWER design is descended directly from the earlier IBM 801 CPU, widely considered to be the first true RISC chip design. It was used in a number of applications inside IBM hardware, but did not become public until they released the poorly-performing IBM PC/RT in the mid-1980s. At about the same time the PC/RT.
IBM 801 - IBM 801 The 801 was a RISC CPU architechture designed at IBM in the 1970's, and used in various roles in IBM until the 1980's. The 801 started as a pure research project led by John Cocke at the Thomas J. Watson Research Center in building 801. They were looking for ways to improve performance of their existing machines, studying traces of programs running on IBM 370 mainframes and looking at the compiler code. From this project led the idea that it was possible to make a very small and very fast core, which could then be used to implement the microcode for any machine. The project then moved on to produce the design as a CPU, also called the 801. The resulting CPU was produced.
IBM 3720 - IBM 3720 The IBM 3720 was a communications controller made by IBM, suitable for use in an IBM System 390. Official service support was withdrawn in 1999 in favour of the IBM 3745. External Link Do You Use a 3705, 3720, 3725? Based on material from FOLDOC, used with permission..
IBM 704 - IBM 704 The IBM 704, the first mass-produced computer with floating point arithmetic hardware, was introduced by IBM in April, 1956. The 704 was an improved version of the IBM 701. Changes from the 701 included the use of magnetic core memory and addition of three index registers. To support these new features, the instructions were expanded to use the full 36 bit word. The new instruction set became the base for the later members of the IBM 700/7000 series. To quote the IBM 704 Manual of operation (see external link below): The type 704 Electronic Data-Processing Machine is a large-scale, high-speed electronic calculator controlled by an internally stored program of the single address type. IBM stated that the device was capable of executing up to.
