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LINCtape
DECtape, originally called Microtape, is a magnetic tape data storage medium used with many Digital Equipment Corporation computers, including the PDP-6, PDP-8, LINC-8, PDP-9, PDP-10, PDP-11, PDP-12, and the PDP-15. On DEC's 32-bit systems, VAX/VMS support for it was implemented but did not become an official part of the product lineup. DECtapes are 3/4 inch (19 mm) wide, and formatted into blocks of data that can each be read or written individually. Each tape stores 184K 12-bit PDP-8 words or 144K 18-bit words. Block size is 128 12-bit words (for the 12-bit machines), or 256 18-bit words for the other machines (16, 18, 32, or 36 bit systems). From a programming point of view, because the system is block-oriented and allows random seeking, DECtape behaves like a very slow disk drive. Origins DECtape has its origin in the LINCtape tape system, which was originally designed by Wesley Clark at the MIT Lincoln Laboratory as an integral part of the LINC computer. There are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DECTape Unit For The DEC PDP-11
DECtape, originally called Microtape, is a magnetic tape data storage medium used with many Digital Equipment Corporation computers, including the PDP-6, PDP-8, LINC-8, PDP-9, PDP-10, PDP-11, PDP-12, and the PDP-15. On DEC's 32-bit systems, VAX/VMS support for it was implemented but did not become an official part of the product lineup. DECtapes are 3/4 inch (19 mm) wide, and formatted into blocks of data that can each be read or written individually. Each tape stores 184K 12-bit PDP-8 words or 144K 18-bit words. Block size is 128 12-bit words (for the 12-bit machines), or 256 18-bit words for the other machines (16, 18, 32, or 36 bit systems). From a programming point of view, because the system is block-oriented and allows random seeking, DECtape behaves like a very slow disk drive. Origins DECtape has its origin in the LINCtape tape system, which was originally designed by Wesley Clark at the MIT Lincoln Laboratory as an integral part of the LINC computer. There are si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LINC
The LINC (Laboratory INstrument Computer) is a 12-bit, 2048-word transistorized computer. The LINC is considered by some the first minicomputer and a forerunner to the personal computer. Originally named the "Linc", suggesting the project's origins at MIT's Lincoln Laboratory, it was renamed LINC after the project moved from the Lincoln Laboratory. The LINC was designed by Wesley A. Clark and Charles Molnar. The LINC and other "MIT Group" machines were designed at MIT and eventually built by Digital Equipment Corporation (DEC) and Spear Inc. of Waltham, Massachusetts (later a division of Becton, Dickinson and Company). The LINC sold for more than $40,000 at the time. A typical configuration included an enclosed 6'X20" rack; four boxes holding (1) two tape drives, (2) display scope and input knobs, (3) control console and (4) data terminal interface; and a keyboard. The LINC interfaced well with laboratory experiments. Analog inputs and outputs were part of the basic design. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
LINC-8
LINC-8 was the name of a minicomputer manufactured by Digital Equipment Corporation between 1966 and 1969. It combined a LINC computer with a PDP-8 in one cabinet, thus being able to run programs written for either of the two architectures. Architecture The LINC-8 contained one PDP-8 CPU and one LINC CPU, partially emulated by the PDP-8. At any one time, the computer was in either 'LINC mode' or 'PDP-8 mode' - both processors could not run in parallel. Instructions were provided to switch between modes. In the LINC-8, all interrupts were handled by the PDP-8 CPU, and programs that relied on the interrupt architecture of the LINC could not be run. The LINC was a 12-bit ones' complement accumulator machine, whereas the PDP-8, while also a 12-bit accumulator machine, operated in two's complement arithmetic. Memory addressing on the two architectures was also different. On the LINC, the full address space was divided into 1024-word ''segments'', two of which were selected for use at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Linc-8
LINC-8 was the name of a minicomputer manufactured by Digital Equipment Corporation between 1966 and 1969. It combined a LINC computer with a PDP-8 in one cabinet, thus being able to run programs written for either of the two architectures. Architecture The LINC-8 contained one PDP-8 CPU and one LINC CPU, partially emulated by the PDP-8. At any one time, the computer was in either 'LINC mode' or 'PDP-8 mode' - both processors could not run in parallel. Instructions were provided to switch between modes. In the LINC-8, all interrupts were handled by the PDP-8 CPU, and programs that relied on the interrupt architecture of the LINC could not be run. The LINC was a 12-bit ones' complement accumulator machine, whereas the PDP-8, while also a 12-bit accumulator machine, operated in two's complement arithmetic. Memory addressing on the two architectures was also different. On the LINC, the full address space was divided into 1024-word ''segments'', two of which were selected for use at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetic Tape Data Storage
Magnetic-tape data storage is a system for storing digital information on magnetic tape using digital recording. Tape was an important medium for primary data storage in early computers, typically using large open reels of IBM 7 track, 7-track, later 9-track tape, 9-track tape. Modern magnetic tape is most commonly packaged in cartridges and cassettes, such as the widely supported Linear Tape-Open (LTO) and IBM 3592 series. The device that performs the writing or reading of data is called a tape drive. Autoloader (data storage device), Autoloaders and tape library, tape libraries are often used to automate cartridge handling and exchange. Compatibility was important to enable transferring data. Tape data storage is now used more for system backup, data archive and data exchange. The low cost of tape has kept it viable for long-term storage and archive. Open reels Initially, magnetic tape for data storage was wound on reels. This standard for large computer systems persis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PDP-12
The PDP-12 (Programmed Data Processor) was created by Digital Equipment Corporation (DEC) in 1969 and was marketed specifically for science and engineering.see Mini-Computer section and press see more, then press see more again It was the third in the LINC family and its main uses were for applications in chemistry, applied psychology, patient monitoring and industrial testing. It is the combination of the LINC computer and the PDP-8 and can run programs for either computer. It features a single central processor with two distinct operating modes, each with its own instruction set that allows it to run both computers' programs. PDP-12 Basic System weighed about . Because it is the combination of two different computers it is very versatile. It can be a laboratory-oriented machine with several facilities for I/O, auxiliary storage, and control and sensing for external equipment or a general purpose computer with a flexible I/O capability that can support multiple peripheral device ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TX-2 Tape System
The TX-2 Tape System was a magnetic tape data storage technology from the late 1950s.R. L. Best and T. C. Stockerbrand, A Computer-Integrated Rapid Access Magnetic Tape System with Fixed AddressProceedings of the Western Joint Computer Conference: Contrasts in Computers May 6-8, 1958; pages 42-46. It is the direct ancestor of LINCtape, used on the LINC laboratory computer. The tape transports used in the system were made as simple and fool-proof as possible, consisting of a read-write head assembly, two reel drive motors, and a tape guide. The tape system used 10 tracks across a tape on reels. Maximum reel speed was 920 inches per second (23.4 metres per second). The system used digital speed control based on a clock track on the tape. The 10-track head assembly contains five channels; three information, one timing, and one block mark. Each channel consists of two redundantly paired tracks, and the paired tracks are nonadjacent to minimize the effect of contamination on the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TX-2
The MIT Lincoln Laboratory TX-2 computer was the successor to the Lincoln TX-0 and was known for its role in advancing both artificial intelligence and human–computer interaction. Wesley A. Clark was the chief architect of the TX-2. Specifications The TX-2 was a transistor-based computer using the then-huge amount of 64 K 36-bit words of magnetic-core memory. The TX-2 became operational in 1958. Because of its powerful capabilities, Ivan Sutherland's revolutionary Sketchpad program was developed for and ran on the TX-2. One of its key features was the ability to directly interact with the computer through a graphical display. The compiler was developed by Lawrence Roberts while he was studying at the MIT Lincoln Laboratory. Relationship with DEC Digital Equipment Corporation was a spin-off of the TX-0 and TX-2 projects. The TX-2 Tape System was a block addressable 1/2" tape developed for the TX-2 by Tom Stockebrand which evolved into LINCtape and DECtape. Role in cre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swap File
Swap or SWAP may refer to: Finance * Swap (finance), a derivative in which two parties agree to exchange one stream of cash flows against another * Barter Science and technology * Swap (computer programming), exchanging two variables in the memory of a computer * Swap partition, a partition of a computer data storage used for paging * SWAP (instrument) (Sun Watcher using Active Pixel System Detector and Image Processing), a space instrument aboard the ''PROBA2'' satellite * SWAP (New Horizons) (Solar Wind At Pluto), a science instrument aboard the unmanned New Horizons space probe * SWAP protein domain, in molecular biology * Size, weight and power (SWaP), see DO-297 Other * Swåp, an Anglo-Swedish folk music band * Sector-Wide Approach (SWAp), an approach to international development See also * Swaps (horse) Swaps (March 1, 1952 – November 3, 1972) was a California bred American thoroughbred racehorse. He won the Kentucky Derby in 1955 and was named United ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timesharing
In computing, time-sharing is the sharing of a computing resource among many users at the same time by means of multiprogramming and multi-tasking.DEC Timesharing (1965), by Peter Clark, The DEC Professional, Volume 1, Number 1 Its emergence as the prominent model of computing in the 1970s represented a major technological shift in the history of computing. By allowing many users to interact concurrently with a single computer, time-sharing dramatically lowered the cost of providing computing capability, made it possible for individuals and organizations to use a computer without owning one, and promoted the interactive use of computers and the development of new interactive applications. History Batch processing The earliest computers were extremely expensive devices, and very slow in comparison to later models. Machines were typically dedicated to a particular set of tasks and operated by control panels, the operator manually entering small programs via switches in order ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OS/8
OS/8 is the primary operating system used on the Digital Equipment Corporation's PDP-8 minicomputer. PDP-8 operating systems which precede OS/8 include: * R-L Monitor, also referred to as MS/8. * P?S/8, requiring only 4K of memory. * PDP-8 4K Disk Monitor System * PS/8 ("Programming System/8"), requiring 8K. This is what became OS/8 in 1971. Other/related DEC operating systems are OS/78, OS/278, and OS/12. The latter is a virtually identical version of OS/8, and runs on Digital's PDP-12 computer. Digital released OS/8 images for non-commercial purposes which can be emulated through SIMH. Overview OS/8 provides a simple operating environment that is commensurate in complexity and scale with the PDP-8 computers on which it ran. I/O is supported via a series of supplied drivers which uses polled (not interrupt-driven) techniques. The device drivers have to be cleverly written as they can occupy only one or two memory pages of 128 12-bit words, and have to be able to run in any ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hard Disk
A hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid rapidly rotating platters coated with magnetic material. The platters are paired with magnetic heads, usually arranged on a moving actuator arm, which read and write data to the platter surfaces. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored and retrieved in any order. HDDs are a type of non-volatile storage, retaining stored data when powered off. Modern HDDs are typically in the form of a small rectangular box. Introduced by IBM in 1956, HDDs were the dominant secondary storage device for general-purpose computers beginning in the early 1960s. HDDs maintained this position into the modern era of servers and personal computers, though personal computing devices produced in large volume, like cell phones and tablets, rely on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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