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MBus (SPARC)
MBus is a computer bus designed and implemented by Sun Microsystems for communication between high speed computer system components, such as the central processing unit, motherboard and main memory. SBus is used in the same machines to connect add-on cards to the motherboard. MBus was first used in Sun's first multiprocessor SPARC-based system, the SPARCserver 600MP series (launched in 1991), and later found use in the SPARCstation 10 and SPARCstation 20 workstations. The bus permits the integration of several microprocessors on a single motherboard, in a multiprocessing configuration with up to eight CPUs packaged in detachable MBus modules. In practice, the number of processors per MBus is limited to four. Single processor systems were also sold that use the MBus protocol internally, but with the CPUs permanently attached to the motherboard to lower manufacturing costs. MBus specifies a 64-bit datapath, which uses 36-bit physical addressing, giving an address space o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sun SuperSPARC II SM71 501-3001
The Sun is the star at the centre of the Solar System. It is a massive, nearly perfect sphere of hot Plasma (physics), plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies. It is by far the most important source of energy for life on Earth. The Sun has been an The Sun in culture, object of veneration in many cultures. It has been a central subject for astronomical research since Ancient history, antiquity. The Sun orbits the Galactic Center at a distance of 24,000 to 28,000 light-years. Its distance from Earth defines the astronomical unit, which is about or about 8 light-minutes. Solar radius, Its diameter is about (), 109 times that of Earth. solar mass, The Sun's mass is about 330,000 times that of Earth, making up about 99.86% of the total mass of the Solar System. The mass of outer layer of the Sun's atmosphere, its ''photosphere'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
36-bit
36-bit computers were popular in the early mainframe computer era from the 1950s through the early 1970s. Starting in the 1960s, but especially the 1970s, the introduction of 7-bit ASCII and 8-bit EBCDIC led to the move to machines using 8-bit bytes, with word sizes that were multiples of 8, notably the 32-bit IBM System/360 mainframe and Digital Equipment VAX and Data General MV series superminicomputers. By the mid-1970s the conversion was largely complete, and microprocessors quickly moved from 8-bit to 16-bit to 32-bit over a period of a decade. The number of 36-bit machines rapidly fell during this period, offered largely for backward compatibility purposes running legacy programs. History Prior to the introduction of computers, the state of the art in precision scientific and engineering calculation was the ten-digit, electrically powered, mechanical calculator, such as those manufactured by Friden, Marchant and Monroe. These calculators had a column of keys for eac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Axil Computer
A leaf (: leaves) is a principal appendage of the stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, flower, and fruit collectively form the shoot system. In most leaves, the primary photosynthetic tissue is the palisade mesophyll and is located on the upper side of the blade or lamina of the leaf, but in some species, including the mature foliage of ''Eucalyptus'', palisade mesophyll is present on both sides and the leaves are said to be isobilateral. The leaf is an integral part of the stem system, and most leaves are flattened and have distinct upper (adaxial) and lower (abaxial) surfaces that differ in color, hairiness, the number of stomata (pores that intake and output gases), the amount and structure of epicuticular wax, and other features. Leaves are mostly green in color due to the presence of a compound called chlorophyll which ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hyundai Group
Hyundai Group (; ) is a South Korean conglomerate founded by Chung Ju-yung. The group was founded in 1947 Hyundai Engineering & Construction, as a construction company. With government assistance, Chung and his family members rapidly expanded into various industries, eventually becoming South Korea's second chaebol. Chung Ju-yung was directly in control of the company until his death in 2001. The company spun off many of its better known businesses after the 1997 Asian financial crisis and founder Chung Ju-yung's death, including Hyundai Motor Group, Hyundai Department Store Group, and Hyundai Heavy Industries Group. The Hyundai Group now focuses on elevators and tourism to Mount Kumgang. Etymology The name "Hyundai" comes from the Korean word (), meaning "modernity". History In 1947, Hyundai Togun (Hyundai Engineering and Construction), the initial company of the Hyundai Group, was established by Chung Ju-yung. Hyundai Construction began operating outside of South Kore ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ross Technology
Ross Technology, Inc. was a semiconductor design and manufacturing company, specializing in SPARC microprocessors. It was founded in Austin, Texas in August 1988 by Dr. Roger D. Ross, a leading computer scientist who headed Motorola's Advanced Microprocessor Division and directed the developments of Motorola's MC68030 and RISC-based 88000 microprocessor families. Dr. Ross was accompanied by Carl Dobbs, Janet Sooch, Steve Goldstein and Travor Smith, who were from Motorola's High-end Microprocessor Division, and were involved in the development of the 88000 microprocessor. He was later joined by Am29000 engineer Raju Vegesna from AMD, who was originally hired by Dr. Ross at Motorola. Cypress Semiconductor provided initial funding. Original board members included Dr. Ross and well-known figures as Dr. T. J. Rodgers of Cypress Semiconductor, John Doerr of Kleiner Perkins Venture Capital, and L. J. Sevin of Sevin Rosen Venture Capital, who also served as board chairman. Ross eve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solbourne Computer
Solbourne Computer, Inc. was originally a vendor of computer systems based in Longmont, Colorado, United States, at first 52% owned by Matsushita. In the late 1980s and early 1990s, the company produced a range of computer workstations and servers based on the SPARC microprocessor architecture, largely compatible with Sun Microsystems' Sun-4 systems. Some of these are notable for supporting symmetric multiprocessing some time before Sun themselves produced multiprocessor systems. Even when Sun produced multiprocessor systems, SunOS uses an asymmetric multiprocessing model rather than OS/MP's symmetric multiprocessing model; Sun would not adopt symmetric multiprocessing until the release of Solaris 2.0 in 1992. Due to the cost of engineering and producing new systems to compete with Sun's increasingly competitive hardware offerings and the loss of symmetric multiprocessing as a distinguishing feature, in 1994, Solbourne left the computer hardware business, with Grumman Systems Sup ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cray CS6400
The Cray Superserver 6400, or CS6400, is a discontinued multiprocessor server computer system produced by Cray Research Superservers, Inc., a subsidiary of Cray Research, and launched in 1993. The CS6400 was also sold as the Amdahl SPARCsummit 6400E. The CS6400 (codenamed ''SuperDragon'' during development) superseded the earlier SPARC-based Cray S-MP system, which was designed by Floating Point Systems. However, the CS6400 adopted the XDBus packet-switched inter-processor bus also used in Sun Microsystems' SPARCcenter 2000 (''Dragon'') and SPARCserver 1000 (''Baby Dragon'' or ''Scorpion'') Sun4d systems. This bus originated in the Xerox Dragon multiprocessor workstation designed at Xerox PARC. The CS6400 was available with either 60 MHz SuperSPARC-I or 85 MHz SuperSPARC-II processors, maximum RAM capacity was 16 GB. Other features shared with the Sun servers included use of the same SuperSPARC microprocessor and Solaris operating system. However, the CS6400 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
XBus
MBus is a computer bus designed and implemented by Sun Microsystems for communication between high speed computer system components, such as the central processing unit, motherboard and main memory. SBus is used in the same machines to connect add-on cards to the motherboard. MBus was first used in Sun's first multiprocessor SPARC-based system, the SPARCserver 600MP series (launched in 1991), and later found use in the SPARCstation 10 and SPARCstation 20 workstations. The bus permits the integration of several microprocessors on a single motherboard, in a multiprocessing configuration with up to eight CPUs packaged in detachable MBus modules. In practice, the number of processors per MBus is limited to four. Single processor systems were also sold that use the MBus protocol internally, but with the CPUs permanently attached to the motherboard to lower manufacturing costs. MBus specifies a 64-bit datapath, which uses 36-bit physical addressing, giving an address space of 6 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arbiter (electronics)
Arbiters are electronic devices that allocate access to shared resources. Bus arbiter There are multiple ways to perform a computer bus arbitration, with the most popular varieties being: * ''dynamic centralized parallel'' where one central arbiter is used for all masters as discussed in this article; * ''centralized serial'' (or "daisy chain") where, upon accessing the bus, the active master passes the opportunity to the next one. In essence, each connected master contains its own arbiter; * ''distributed arbitration by self-selection'' ( distributed bus arbitration) where the access is self-granted based on the decision made locally by using information from other masters; * ''distributed arbitration by collision detection'' where each master tries to access the bus on its own, but detects conflicts and retries the failed operations. A bus arbiter is a device used in a multi-master bus system to decide which bus master will be allowed to control the bus for each bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megabyte
The megabyte is a multiple of the unit byte for digital information. Its recommended unit symbol is MB. The unit prefix ''mega'' is a multiplier of (106) in the International System of Units (SI). Therefore, one megabyte is one million bytes of information. This definition has been incorporated into the International System of Quantities. In the computer and information technology fields, other definitions have been used that arose for historical reasons of convenience. A common usage has been to designate one megabyte as (220 B), a quantity that conveniently expresses the binary architecture of digital computer memory. Standards bodies have deprecated this binary usage of the mega- prefix in favor of a new set of binary prefixes, by means of which the quantity 220 B is named mebibyte (symbol MiB). Definitions The unit megabyte is commonly used for 10002 (one million) bytes or 10242 bytes. The interpretation of using base 1024 originated as technical jargon for the byte m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
