NCR VRX

Last updated

VRX is an acronym for Virtual Resource eXecutive, a proprietary operating system on the NCR Criterion series, and later the V-8000 series of mainframe computers manufactured by NCR Corporation during the 1970s and 1980s. It replaced the B3 Operating System originally distributed with the Century series, and inherited many of the features of the B4 Operating System from the high-end of the NCR Century series of computers. VRX was upgraded in the late 1980s and 1990s to become VRX/E for use on the NCR 9800 (Criterion) series of computers. Edward D. Scott managed the development team of 150 software engineers who developed VRX and James J "JJ" Whelan was the software architect responsible for technical oversight and the overall architecture of VRX. Tom Tang was the Director of Engineering at NCR responsible for development of the entire Criterion family of computers. This product line achieved over $1B in revenue and $300M in profits for NCR.

VRX was shipped to its first customers, on a trial basis, in 1977. [1] Customer sites included the United Farm Workers labor union, who in 1982 were running an NCR 8555 mainframe running VRX. [2]

VRX was NCR's response to IBM's MVS virtual storage operating system and was NCR's first virtual storage system. It was based on a segmented page architecture provided in the Criterion architecture.

The Criterion series provided a virtual machine architecture which allowed different machine architectures running under the same operating system. The initial offering provided a Century virtual machine which was instruction compatible with the Century series and a COBOL virtual machine designed to optimize programs written in COBOL. Switching between virtual machines was provided by a virtual machine indicator in the subroutine call mechanism. This allowed programs written in one virtual machine to use subroutines written for another. The same mechanism was used to enter an "executive" state used for operating system functions and a "privileged system" state used for direct access to hardware.

Related Research Articles

IBM mainframes are large computer systems produced by IBM since 1952. During the 1960s and 1970s, IBM dominated the computer market with the 7000 series and the later System/360, followed by the System/370. Current mainframe computers in IBM's line of business computers are developments of the basic design of the System/360.

<span class="mw-page-title-main">MVS</span> Operating system for IBM mainframes

Multiple Virtual Storage, more commonly called MVS, is the most commonly used operating system on the System/370, System/390 and IBM Z IBM mainframe computers. IBM developed MVS, along with OS/VS1 and SVS, as a successor to OS/360. It is unrelated to IBM's other mainframe operating system lines, e.g., VSE, VM, TPF.

<span class="mw-page-title-main">Mainframe computer</span> Large computer

A mainframe computer, informally called a mainframe or big iron, is a computer used primarily by large organizations for critical applications like bulk data processing for tasks such as censuses, industry and consumer statistics, enterprise resource planning, and large-scale transaction processing. A mainframe computer is large but not as large as a supercomputer and has more processing power than some other classes of computers, such as minicomputers, servers, workstations, and personal computers. Most large-scale computer-system architectures were established in the 1960s, but they continue to evolve. Mainframe computers are often used as servers.

<span class="mw-page-title-main">VSE (operating system)</span>

VSEn is an operating system for IBM mainframe computers, the latest one in the DOS/360 lineage, which originated in 1965. It is less common than z/OS and is mostly used on smaller machines.

<span class="mw-page-title-main">NCR Voyix</span> American software company

NCR Voyix Corporation, previously known as NCR Corporation and National Cash Register, is an American software, consulting and technology company providing several professional services and electronic products. It manufactured self-service kiosks, point-of-sale terminals, automated teller machines, check processing systems, and barcode scanners.

<span class="mw-page-title-main">Data General</span> Minicomputer manufacturer, 1968–1999

Data General Corporation was one of the first minicomputer firms of the late 1960s. Three of the four founders were former employees of Digital Equipment Corporation (DEC).

<span class="mw-page-title-main">IBM Series/1</span> 1970s era IBM minicomputer

The IBM Series/1 is a 16-bit minicomputer, introduced in 1976, that in many respects competed with other minicomputers of the time, such as the PDP-11 from Digital Equipment Corporation and similar offerings from Data General and HP. The Series/1 was typically used to control and operate external electro-mechanical components while also allowing for primitive data storage and handling.

<span class="mw-page-title-main">General Comprehensive Operating System</span> Operating system from General Electric

General Comprehensive Operating System is a family of operating systems oriented toward the 36-bit GE-600 series and Honeywell 6000 series mainframe computers.

The Burroughs Large Systems Group produced a family of large 48-bit mainframes using stack machine instruction sets with dense syllables. The first machine in the family was the B5000 in 1961, which was optimized for compiling ALGOL 60 programs extremely well, using single-pass compilers. The B5000 evolved into the B5500 and the B5700. Subsequent major redesigns include the B6500/B6700 line and its successors, as well as the separate B8500 line.

<span class="mw-page-title-main">CICS</span> IBM mainframe transaction monitor

IBM CICS is a family of mixed-language application servers that provide online transaction management and connectivity for applications on IBM mainframe systems under z/OS and z/VSE.

<span class="mw-page-title-main">Amdahl Corporation</span> American mainframe computer manufacturer

Amdahl Corporation was an information technology company which specialized in IBM mainframe-compatible computer products, some of which were regarded as supercomputers competing with those from Cray Research. Founded in 1970 by Gene Amdahl, a former IBM computer engineer best known as chief architect of System/360, it has been a wholly owned subsidiary of Fujitsu since 1997. The company was located in Sunnyvale, California.

DIBOL or Digital's Business Oriented Language is a general-purpose, procedural, imperative programming language that was designed for use in Management Information Systems (MIS) software development. It was developed from 1970 to 1993.

<span class="mw-page-title-main">IBM 3790</span>

The IBM 3790 Communications System was one of the first distributed computing platforms. The 3790 was developed by IBM's Data Processing Division (DPD) and announced in 1974. It preceded the IBM 8100, announced in 1979.

OfficeVision was an IBM proprietary office support application.

Since the rise of the personal computer in the 1980s, IBM and other vendors have created PC-based IBM-compatible mainframes which are compatible with the larger IBM mainframe computers. For a period of time PC-based mainframe-compatible systems had a lower price and did not require as much electricity or floor space. However, they sacrificed performance and were not as dependable as mainframe-class hardware. These products have been popular with mainframe developers, in education and training settings, for very small companies with non-critical processing, and in certain disaster relief roles.

<span class="mw-page-title-main">OS/VS1</span> IBM operating system

Operating System/Virtual Storage 1, or OS/VS1, is a discontinued IBM mainframe computer operating system designed to be run on IBM System/370 hardware. It was the successor to the Multiprogramming with a Fixed number of Tasks (MFT) option of System/360's operating system OS/360. OS/VS1, in comparison to its predecessor, supported virtual memory. OS/VS1 was generally available during the 1970s and 1980s, and it is no longer supported by IBM.

The history of IBM mainframe operating systems is significant within the history of mainframe operating systems, because of IBM's long-standing position as the world's largest hardware supplier of mainframe computers. IBM mainframes run operating systems supplied by IBM and by third parties.

Edos is a discontinued operating system based upon IBM's original mainframe DOS. The name stood for extended disk operating system. It was later purchased by the West German computer company Nixdorf, who renamed it to NIDOS.

The Event Driven Executive (EDX) is a computer operating system originally developed by IBM for the control of research laboratory devices and experiments. It included an application programming language known as EDL and HCF, a Host Communication Facility.

CP-6 is a discontinued computer operating system, developed by Honeywell, Inc. in 1976, which was a backward-compatible work-alike of the Xerox CP-V, fully rewritten for Honeywell Level/66 hardware. CP-6 was a command line oriented system. A terminal emulator allowed use of PCs as CP-6 terminals.

References

  1. ↑ "NCR Test Site Reports: VRX Puts Programmers Into High Gear". Computerworld . 11 (47). IDG Enterprise: 27. 1977-11-21 – via Google Books.
  2. ↑ "UFW Uses DBMS to Handle Business Growth". Computerworld . 16 (19). IDG Enterprise: 43. 1982-05-10 – via Google Books.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.