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The DEC 2000 AXP or DECpc AXP 150 is a series of entry level server and workstation computers respectively, developed and manufactured by Digital Equipment Corporation. A workstation, such as a Unix workstation, RISC workstation or Engineering workstation, is a high-end Microcomputer A computer is a Machine that manipulates data according to a list of instructions. Digital Equipment Corporation was a pioneering American company in the Computer industry Launched on October 28, 1992, the DECpc AXP 150 was the first Alpha AXP based system to support the Windows NT operating system. Alpha, originally known as Alpha AXP, was a 64-bit Reduced instruction set computer (RISC Instruction set architecture (ISA developed Windows NT is a family of Operating systems produced by Microsoft, the first version of which was released in July 1993 An operating system (commonly abbreviated OS and O/S) is the software component of a Computer system that is responsible for the management and coordination The DEC 2000 AXP also supported Digital's OpenVMS AXP and OSF/1 AXP (later renamed to Digital UNIX) operating systems. Open Virtual Memory System ( OpenVMS) initially known just as Virtual Memory System ( VMS) is the name of a High-end Computer server Tru64 UNIX is a 64-bit UNIX Operating system for the Alpha Microprocessor architecture currently owned by Hewlett-Packard

The development of the DEC 2000 AXP was led by DEC's Entry Level Solutions Business based in Ayr, Scotland. Ayr (Inbhir Àir Mouth of the River Ayr) is a town and port situated on the Firth of Clyde, in south-west Scotland. Scotland ( Gaelic: Alba) is a Country in northwest Europethat occupies the northern third of the island of Great Britain. It was later succeeded by the entry level Multia and the mid range AlphaStation. The Multia, later re-branded the Universal Desktop Box, was a line of computer workstations introduced by Digital Equipment Corporation AlphaStation was the name given to a series of Computer workstations produced from 1994 onwards by Digital Equipment Corporation, and latterly by Compaq

Contents

Models

There are two models of the DEC 2000 AXP:

Description

The DEC 2000 AXP systems used a 150 MHz DECchip 21064 microprocessor with a 512 KB[1] B-cache (L2 cache), which is implemented with 17 nanosecond SRAMs on the motherboard. Alpha, originally known as Alpha AXP, was a 64-bit Reduced instruction set computer (RISC Instruction set architecture (ISA developed Static random access memory (SRAM is a type of Semiconductor memory where the word static indicates that unlike ''dynamic'' RAM (DRAM, it does not

Unlike other similar Alpha AXP systems of the time, such as the DEC 3000 AXP, the DEC 2000 AXP used the EISA bus instead of the TURBOchannel bus. The Extended Industry Standard Architecture (in practice almost always shortened to EISA and frequently pronounced "eee-suh" is a bus standard for IBM compatible TURBOchannel is an open Computer bus developed by DEC by during the late 1980s and early 1990s The decision to use the EISA bus was due to cost requirements. The EISA bus was an industry standard bus, and there were more vendors offering EISA options, in addition to EISA chipsets. In contrast, the TURBOchannel bus, while offering higher performance, would have required more expensive ASICs like the DEC 3000 AXP, and would have reduced the number of options available.

The EISA bus was implemented by a subset of the Intel 82350DT chipset, and features a 82358 EBC (EISA Bus Controller) chip, a 82357 ISP (Integrated System Peripheral) chip and two 82352 EBB (EISA Bus Buffer) chips. The DEC 2000 AXP provides six EISA expansion slots. Pre-installed EISA cards typically comprised a Compaq QVision VGA adapter, Adaptec AHA-1742 SCSI host adapter, and a DEC DE422 Ethernet adapter. Compaq Computer Corporation was an American Personal computer company founded in 1982 and is now a brand name of Hewlett-Packard. The term Video Graphics Array ( VGA) refers specifically to the display hardware first introduced with the IBM PS/2 line of computers in 1987, but through its widespread Adaptec is a Computer hardware company based in Milpitas California that primarily produces Host adapters for connecting storage devices Ethernet is a family of frame -based Computer networking technologies for Local area networks (LANs

A VLSI Technologies VL82C106 combination chip, was used to provide the real time clock as well as the serial, LPT, and PS/2 ports. VLSI Technology Inc was a company which designed and manufactured custom and semi-custom ICs The company was based in Silicon Valley, with headquarters at 1109 In Computing, a serial port is a Serial communication physical interface through which information transfers in or out one Bit at a time (contrast LPT (Line Print Terminal is the original yet still common name of the Parallel port interface on IBM PC-compatible Computers It was designed to operate The PS/2 connector is used for connecting some keyboards and mice to a PC compatible computer system

The system supports 16 to 128 MB of memory. Standard 36-bit SIMMs clocked at 70 nanosecond with parity protection are used to populate eight SIMM slots, which are organised in two banks of four slots each. A SIMM, or single in-line memory module, is a type of memory module containing Random access memory used in Computers from the early 1980s to the late 1990s The DEC 2000 AXP supports two memory options, a 16 MB (4 × 4 MB SIMMs) and a 64 MB (4 × 16 MB SIMMs) kit.

The DECpc AXP 150 running Windows NT can only use a VGA monitor. The term Video Graphics Array ( VGA) refers specifically to the display hardware first introduced with the IBM PS/2 line of computers in 1987, but through its widespread The DEC 2000 AXP models running OpenVMS or DEC OSF/1 AXP can use a VT-series terminal or equivalent. A computer terminal is an electronic or electromechanical hardware device that is used for entering data into and displaying data from a Computer or a Computing

References

Notes

  1. ^ When applied to computer memory (RAM or cache) the quantities KB, MB and GB are defined as:
    • 1 KB = 1024 B
    • 1 MB = 1024 KB
    • 1 GB = 1024 MB,
    consistent with the JEDEC memory standard. A byte (pronounced "bite" baɪt is the basic unit of measurement of information storage in Computer science. The JEDEC Solid State Technology Association is the semiconductor engineering standardization body of the Electronic Industries Alliance (EIA
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