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Sun-100-front
Sun-1 was the first generation of UNIX computer workstations and servers produced by Sun Microsystems, launched in May 1982. These were based on a CPU board designed by Andy Bechtolsheim while he was a graduate student at Stanford University and funded by DARPA. The Sun-1 systems ran SunOS 0.9, a port of UniSoft's UniPlus V7 port of Seventh Edition UNIX to the Motorola 68000 microprocessor, with no window system. Affixed to the case of early Sun-1 workstations and servers is a red bas relief emblem with the word ''SUN'' spelled using only symbols shaped like the letter ''U''. This is the original Sun logo, rather than the more familiar purple diamond shape used later. The first Sun-1 workstation was sold to Solo Systems in May 1982. The Sun-1/100 was used in the original Lucasfilm EditDroid non-linear editing system. Models Hardware The Sun-1 workstation was based on the Stanford University SUN workstation designed by Andy Bechtolsheim (advised by Vaughan Pratt and Fores ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sun-2
The Sun-2 series of UNIX workstations and servers was launched by Sun Microsystems in November 1983. As the name suggests, the Sun-2 represented the second generation of Sun systems, superseding the original Sun-1 series. The Sun-2 series used a 10 MHz Motorola 68010 microprocessor with a proprietary Sun-2 Memory Management Unit (MMU), which enabled it to be the first Sun architecture to run a full virtual memory UNIX implementation, SunOS 1.0, based on 4.1BSD. Early Sun-2 models were based on the Intel Multibus architecture, with later models using VMEbus, which continued to be used in the successor Sun-3 and Sun-4 families. Sun-2 systems were supported in SunOS until version 4.0.3. A port to support Multibus Sun-2 systems in NetBSD was begun in January 2001 from the Sun-3 support in the NetBSD 1.5 release. Code supporting the Sun-2 began to be merged into the NetBSD tree in April 2001. sun2 is considered a tier 2 support platform as of NetBSD 7.0.1. Sun-2 models Mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harvard Business School
Harvard Business School (HBS) is the graduate school, graduate business school of Harvard University, a Private university, private Ivy League research university. Located in Allston, Massachusetts, HBS owns Harvard Business Publishing, which publishes business books, leadership articles, Case method, case studies, and ''Harvard Business Review'', a monthly academic business magazine. It is also home to the Baker Library/Bloomberg Center, the school's primary library. Harvard Business School is one of six List of Ivy League business schools, Ivy League business schools. History The school was established in 1908. Initially established by the humanities faculty, it received independent status in 1910, and became a separate administrative unit in 1913. The first dean was historian Edwin Francis Gay (1867–1946). Yogev (2001) explains the original concept: :This school of business and public administration was originally conceived as a school for diplomacy and government servi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zero Wait State
A wait state is a delay experienced by a computer processor when accessing external memory or another device that is slow to respond. Computer microprocessors generally run much faster than the computer's other subsystems, which hold the data the CPU reads and writes. Even memory, the fastest of these, cannot supply data as fast as the CPU could process it. In an example from 2011, typical PC processors like the Intel Core 2 and the AMD Athlon 64 X2 run with a clock of several GHz, which means that one clock cycle is less than 1 nanosecond (typically about 0.3 ns to 0.5 ns on modern desktop CPUs), while main memory has a latency of about 15–30 ns. Some second-level CPU caches run slower than the processor core. When the processor needs to access external memory, it starts placing the address of the requested information on the address bus. It then must wait for the answer, that may come back tens if not hundreds of cycles later. Each of the cycles spent waiting is called a wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Memory Management Unit
A memory management unit (MMU), sometimes called paged memory management unit (PMMU), is a computer hardware unit that examines all references to computer memory, memory, and translates the memory addresses being referenced, known as virtual memory addresses, into physical addresses in main memory. In modern systems, programs generally have addresses that access the theoretical maximum memory of the computer architecture, 32 or 64 bits. The MMU maps the addresses from each program into separate areas in physical memory, which is generally much smaller than the theoretical maximum. This is possible because programs rarely use large amounts of memory at any one time. Most modern operating systems (OS) work in concert with an MMU to provide virtual memory (VM) support. The MMU tracks memory use in fixed-size blocks known as ''pages''. If a program refers to a location in a page that is not in physical memory, the MMU sends an interrupt to the operating system. The OS selects a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Single-board Computer
A single-board computer (SBC) is a complete computer built on a single circuit board, with microprocessor(s), memory, input/output (I/O) and other features required of a functional computer. Single-board computers are commonly made as demonstration or development systems, for educational systems, or for use as embedded computer controllers. Many types of home computers or portable computers integrate all their functions onto a single printed circuit board. Unlike a desktop personal computer, single-board computers often do not rely on expansion slots for peripheral functions or expansion. Single-board computers have been built using a wide range of microprocessors. Simple designs, such as those built by computer hobbyists, often use static RAM and low-cost 32- or 64-bit processors like ARM. Other types, such as blade servers, would perform similar to a server computer, only in a more compact format. A computer-on-module is a type of single-board computer made to plug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multibus
Multibus is a computer bus standard used in industrial systems. It was developed by Intel Corporation and was adopted as the IEEE 796 bus. The Multibus specification was a robust industry standard with a relatively large form factor, allowing complex devices to be designed on it. Because it was well-defined and well-documented, a Multibus-compatible industry grew around it, with many companies making card cages and enclosures for it. Many others made CPU, memory, and other peripheral boards. In 1982 there were over 100 Multibus board and systems manufacturers. This allowed complex systems to be built from commercial off-the-shelf hardware, and also allowed companies to innovate by designing a proprietary Multibus board, then integrate it with another vendor's hardware to create a complete system. One example of this was Sun Microsystems with their Sun-1 and Sun-2 workstations. Sun built custom-designed CPU, memory, SCSI, and video display boards, and then added 3Com Ether ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forest Baskett
Forest Baskett (born May 11, 1943) is an American venture capitalist, computer scientist and former professor of electrical engineering at Stanford University. He is a venture capitalist at New Enterprise Associates. Baskett designed the operating system for the original Cray-1 supercomputer, was an original pioneer of Very Large Scale Integration, and co-introduced the eponymous BCMP networks. Career Baskett received a BA in mathematics from Rice University and a Ph.D. in computer science from the University of Texas at Austin. He became a member of the National Academy of Engineering in 1994 for his vision and leadership in the development of hardware and software for high-performance workstations. Baskett was the doctoral advisor of computer scientists Alan J. Smith and Andy Bechtolsheim while at Stanford and was involved in the founding of Sun Microsystems. He was also the CTO and Senior Vice President of R&D at Silicon Graphics Silicon Graphics, Inc. (stylized ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vaughan Pratt
Vaughan Pratt (born April 12, 1944) is a Professor, Professor Emeritus at Stanford University, who was an early pioneer in the field of computer science. Since 1969, Pratt has made several contributions to foundational areas such as search algorithms, sorting algorithms, and primality testing. More recently, his research has focused on formal modeling of concurrency (computer science), concurrent systems and Chu spaces. Career Raised in Australia and educated at Knox Grammar School, where he was Dux#Education, dux in 1961, Pratt attended Sydney University, where he completed his masters thesis in 1970, related to what is now known as natural language processing. He then went to the United States, where he completed a Ph.D. thesis at Stanford University in only 20 months under the supervision of advisor Donald Knuth. His thesis focused on analysis of the Shellsort sorting algorithm and sorting networks. Pratt was an assistant professor at Massachusetts Institute of Technology, MI ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SUN Workstation
The SUN workstation was a modular computer system designed at Stanford University in the early 1980s. It became the seed technology for many commercial products, including the original workstations from Sun Microsystems. History In 1979 Xerox donated some Alto computers, developed at their Palo Alto Research Center, to Stanford's Computer Science Department, as well as other universities that were developing the early Internet. The Altos were connected using Ethernet to form several local area networks. The SUN's design was inspired by that of the Alto, but used lower-cost modular components. (Many words are spelled phonetically) The project name was derived from the initials of the campus' Stanford University Network. CSL Technical Report 229 (First author name is misspelled on cover) Professor Forest Baskett suggested the best-known configuration: a relatively low-cost personal workstation for computer-aided logic design work. The design created a 3M computer: a 1 million ins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
