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MicroVAX
The MicroVAX is a discontinued family of low-cost minicomputers developed and manufactured by Digital Equipment Corporation (DEC). The first model, the MicroVAX I, shipped in 1984. The series uses processors that implement the VAX instruction set architecture (ISA) and were succeeded by the VAX 4000. Many members of the MicroVAX family have corresponding VAXstation variants, which primarily differ by the addition of graphics hardware. The MicroVAX family supports Digital's OpenVMS, VMS, ULTRIX, and VAXELN operating systems. Prior to VMS V5.0, MicroVAX hardware required a dedicated version of VMS named MicroVMS. MicroVAX I The MicroVAX I, code-named ''Seahorse'', introduced in October 1984, was one of DEC's first VAX computers to use very-large-scale integration (VLSI) technology. The KA610 CPU module (also known as the KD32) contains two custom chips which implemented the Arithmetic-logic unit, ALU and Floating-point unit, FPU while Transistor-transistor logic, TTL chips were use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VAXstation
The VAXstation is a discontinued family of workstation computers developed and manufactured by Digital Equipment Corporation using processors implementing the VAX instruction set architecture. VAXstation systems were typically shipped with either the OpenVMS or ULTRIX operating systems. Many members of the VAXstation family had corresponding MicroVAX variants, which primarily differ by the lack of graphics hardware. VAXstation 100 The VAXstation 100 is an intelligent graphics terminal (also described as a ''Display subsystem'') introduced by Digital in May 1983 for the VAX-11 line of computers. The VAXstation 100 was Digital's first workstation hardware for the VAX platform; the graphics terminal approach was selected due to the lack of availability of a VLSI VAX CPU necessary to create a standalone VAX workstation when the project began in 1981. The VAXstation 100's design was based on two internal research projects at Digital - a dedicated VAX workstation named ''SUVAX'' (Si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MicroVAX 78032
The MicroVAX 78032 (otherwise known as the DC333) is a microprocessor developed and fabricated by Digital Equipment Corporation (DEC) that implements a subset of the VAX instruction set architecture (ISA). The 78032 is used exclusively in DEC's VAX-based systems, starting with the MicroVAX, MicroVAX II in 1985. When clocked at a frequency of 5 MHz, the 78032's integer performance is comparable to the original VAX-11, VAX-11/780 of 1977. The microprocessor can be paired with the MicroVAX 78132 floating point accelerator for improved floating point performance. The 78032 represents a number of firsts for DEC. It is DEC's first single-chip microprocessor implementation of the VAX ISA and DEC's first self-fabricated microprocessor. The MicroVAX 78032 is also the first semiconductor device to be registered for protection under the Semiconductor Chip Protection Act of 1984. The MicroVAX 78032 contains 125,000 transistors on an 8.7 by 8.6 mm (74.82 mm2) Die (integrated cir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OpenVMS
OpenVMS, often referred to as just VMS, is a multi-user, multiprocessing and virtual memory-based operating system. It is designed to support time-sharing, batch processing, transaction processing and workstation applications. Customers using OpenVMS include banks and financial services, hospitals and healthcare, telecommunications operators, network information services, and industrial manufacturers. During the 1990s and 2000s, there were approximately half a million VMS systems in operation worldwide. It was first announced by Digital Equipment Corporation (DEC) as VAX/VMS (''Virtual Address eXtension/Virtual Memory System'') alongside the VAX-11/780 minicomputer in 1977. OpenVMS has subsequently been ported to run on DEC Alpha systems, the Itanium-based HPE Integrity Servers, and select x86-64 hardware and hypervisors. Since 2014, OpenVMS is developed and supported by VMS Software Inc. (VSI). OpenVMS offers high availability through computer cluster, clustering—the ability t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VAXELN
VAXELN (typically pronounced "VAX-elan") is a discontinued real-time operating system for the VAX family of computers produced by the Digital Equipment Corporation (DEC) of Maynard, Massachusetts. As with RSX-11 and VMS, Dave Cutler was the principal force behind the development of this operating system. Cutler's team developed the product after moving to the Seattle, Washington area to form the DECwest Engineering Group; DEC's first engineering group outside New England. Initial target platforms for VAXELN were the ''backplane interconnect'' computers such as the V-11 family. When VAXELN was well under way, Cutler spearheaded the next project, the MicroVAX I, the first VAX microcomputer. Although it was a low-volume product compared with the New England-developed MicroVAX II, the MicroVAX I demonstrated the set of architectural decisions needed to support a single-board implementation of the VAX computer family, and it also provided a platform for embedded system applicatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MicroVMS
OpenVMS, often referred to as just VMS, is a multi-user, multiprocessing and virtual memory-based operating system. It is designed to support time-sharing, batch processing, transaction processing and workstation applications. Customers using OpenVMS include banks and financial services, hospitals and healthcare, telecommunications operators, network information services, and industrial manufacturers. During the 1990s and 2000s, there were approximately half a million VMS systems in operation worldwide. It was first announced by Digital Equipment Corporation (DEC) as VAX/VMS (''Virtual Address eXtension/Virtual Memory System'') alongside the VAX-11/780 minicomputer in 1977. OpenVMS has subsequently been ported to run on DEC Alpha systems, the Itanium-based HPE Integrity Servers, and select x86-64 hardware and hypervisors. Since 2014, OpenVMS is developed and supported by VMS Software Inc. (VSI). OpenVMS offers high availability through clustering—the ability to distribute th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robotron K 1820
The K 1820, full name RVS K 1820 ({{lang, de, Rechnersystem mit virtuellem Speicher, "computer system with virtual memory"), cipher in the SM EVM of the former COMECON countries SM 1720, is a workstation developed in East Germany. VEB Robotron Elektronik Dresden began development of the K 1820 in 1986 and it went into serial production in 1990. Minicomputer The K 1820 is a clone of the MicroVAX II made by Digital Equipment Corporation (DEC). The import of western 32-bit computers to the COMECON area was impeded by the CoCom technology embargo. As the MicroVAX II CPU is one of the first semiconductor devices which was protected by the Semiconductor Chip Protection Act of 1984, independent development of modern CAD technology based on a 32-bit computer architecture began. Copies of the MicroVAX II were also created in Hungary (MicroSTAR 32 or TPA-11/510) and the Soviet Union (SМ 1702). [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VAX 4000
The VAX 4000 is a discontinued family of low-end superminicomputers developed and manufactured by Digital Equipment Corporation (later Compaq) using microprocessors implementing the VAX instruction set architecture (ISA). The VAX 4000 succeeded the MicroVAX family, and shipped with the OpenVMS operating system. It was the last family of low-end VAX systems, as the platform was discontinued by Compaq. VAX 4000 Model 300 The VAX 4000 Model 300, code-named "''Pele''", was introduced on 9 July 1990 at DECworld in Boston, Massachusetts, replacing the MicroVAX 3800 and 3900. It used the time-sharing KA670-AA CPU module containing a 35.71 MHz (28 ns cycle time) Rigel chip set with a 128 KB external secondary cache protected by ECC built from 84 ns SRAM. It supported one to four MS670-BA (32 MB) or MS670-CA (64 MB) memory modules for 32 to 256 MB of memory. Q-bus was used for expansion. The Model 300 could be upgraded to a Model 400, Model 500 or Model 600 by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Q-bus
The Q-bus, also known as the LSI-11 Bus, is one of several bus (computing), bus technologies used with Programmed Data Processor, PDP and VAX, MicroVAX computer systems previously manufactured by the Digital Equipment Corporation of Maynard, Massachusetts, Maynard, Massachusetts. The Q-bus is a less expensive version of Unibus using multiplexing so that address and data signals share the same wires. This allows both a physically smaller and less-expensive implementation of essentially the same functionality. Over time, the physical address range of the Q-bus was expanded from 16 to 18 and then 22 bits. Block transfer modes were also added to the Q-bus. Main features of the Q-bus The Q-bus is arranged as a series of Expansion card, modules installed in one or more Backplane, backplanes. Like the Unibus before it, the Q-bus uses: * ''Memory-mapped I/O'' * ''Byte addressing'' * A strict ''Master-slave (computers), master-slave'' relationship between devices on the bus * ''Asynchro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Equipment Corporation
Digital Equipment Corporation (DEC ), using the trademark Digital, was a major American company in the computer industry from the 1960s to the 1990s. The company was co-founded by Ken Olsen and Harlan Anderson in 1957. Olsen was president until he was forced to resign in 1992, after the company had gone into precipitous decline. The company produced many different product lines over its history. It is best known for the work in the minicomputer market starting in the early 1960s. The company produced a series of machines known as the Programmed Data Processor, PDP line, with the PDP-8 and PDP-11 being among the most successful minis in history. Their success was only surpassed by another DEC product, the late-1970s VAX "supermini" systems that were designed to replace the PDP-11. Although a number of competitors had successfully competed with Digital through the 1970s, the VAX cemented the company's place as a leading vendor in the computer space. As microcomputers improved in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
