NCR 315

The NCR 315 Data Processing System, released in January 1962 by NCR, ^[1] was a second-generation computer. All printed circuit boards used resistor-transistor logic to create the various logic elements. It used 12-bit slab memory structure using core memory. The instructions could use a memory slab as either two 6-bit alphanumeric characters or as three 4-bit BCD characters. Basic memory was 5k of hand-made core memory, which was expandable to a maximum of 40 k in four refrigerator-size cabinets. The main processor included three cabinets and a console section that housed the power supply, keyboard, output writer (an IBM Selectric-i typewriter), and a panel of lights that indicated the current status of the program counter, registers, arithmetic accumulator, and system errors. Input/Output was by direct parallel connections to each type of peripheral through a two-cable bundle with 1-inch-thick cables. Some devices like magnetic tape and the CRAM were daisy-chained to allow multiple drives to be connected.

Later models in this series include the 315-100 and the 315-RMC (Rod Memory Computer).

NCR 315-100

The NCR 315-100 was the second version of the original 315. It too had a 8 microsecond clock cycle, 10-40K Memory.

The primary difference between the older NCR 315 and the 315-100 was the inclusion of the Automatic Recovery Option (ARO). One of the problems with early generation of computers was that when a memory or program error occurred, the system would literally turn on a red light and halt. The normal recovery process was to copy all register and counter setting from the console light panel, and to restart the program that was running at the time of the error. Usually the restart was from the very beginning of the program.

The upgrade to the 315 required the removal of approximate 1800 wire-wrapped connection on the backplane, and the installation of approximately 2400 new point-to-point wired connection.

NCR 315-RMC

The NCR 315-RMC, released in July 1965, was the first commercially available computer to employ thin film memory. This reduced the clock cycle time to 800 nanoseconds. It also included floating-point logic to allow scientific calculations, while retaining the same instruction set as previous NCR 315 and NCR 315-100.

The thin film was wrapped around "rods" to allow faster reading and writing of memory.

Available languages

• NCR Assembler Language
• National Electronic Autocoding Technique (NEAT)
• COBOL
• BEST

Available peripherals

• NCR-321 Communications Controller
• NCR-340 600-LPM line printer
• Magnetic tapes
  • NCR-332 Magnetic tape drive (512 bpi)
  • NCR-333 Control Data CDC tape drive (512 bpi)
  • NCR-334 Magnetic Tape Drive (200/512 bpi)
• NCR-353 Magnetic Card Random Access Memory (CRAM)
• Card and tape equipment
  • NCR-361 Paper Tape Reader
  • NCR-371 Paper Tape Punch
  • NCR-376 IBM Card Reader/Punch
  • NCR-380 2000 CPS High speed card reader
  • NCR-472 Card Reader, Paper Tape Reader/Punch
• NCR-??? Drum memory
• NCR-402 MICR Check Reader/Sorter
• NCR-420 Optical Character Reader(OCR)
• NCR-407 High Speed MICR Check Reader/Sorter

See also

• The Super Fight - Used an NCR 315 to predict its outcome

References

1. ^ Flamm, Kenneth (1988). Creating the computer: government, industry, and high technology. Brookings Institution Press. p. 118. ISBN 0815728506. http://books.google.com/books?id=p6S9WOniQN4C&pg=PA118&dq=%22NCR+315%22&hl=en&ei=ZypITfuUIYOB8gat9Pi1Bg&sa=X&oi=book_result&ct=result&resnum=1&ved=0CDQQ6AEwAA#v=onepage&q=%22NCR%20315%22&f=false. 

This computer hardware article is a stub. You can help Wikipedia by expanding it.v · Categories: Mainframe computers Transistorized computers NCR products Computer hardware stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем написать реферат Spingarn High School List of Canadian plants by family PQ Look at other dictionaries: NCR 315-100 — The NCR 315 100 Mainframe computer is the second version of NCR s second generation and is based on the original NCR 315. Like the original 315 it has a 600 nanosecond clock cycle, 10 40K Memory. The primary difference between the older NCR 315… …   Wikipedia NCR 315-RMC — The NCR 315 RMC, released in July 1965 by NCR Corporation, was the first commercially available computer to employ thin film memory. This reduced the clock cycle time to 800 nanoseconds. It also included floating point logic to allow scientific… …   Wikipedia NCR Corporation — Type Public (NYSE: NCR) Industry Technology …   Wikipedia NCR Century 100 — Logo The NCR Century 100 was NCR s first all integrated circuit computer.[1] The 615 100 Series integrated a complete data processing system had 16KB or 32KB of short rod memory, 80 column card reader or paper tape reader, two 5MB removable disc… …   Wikipedia NCR 304 — computer system Camp Pendleton, California The NCR 304, introduced in 1957, was National Cash Register (NCR) s first transistor based computer. The 304 was developed and manufactured in cooperation with General Electric. Its follow on was the NCR …   Wikipedia NCR — Para otros usos de este término, véase Nuevo Camino Revolucionario. La corporación NCR es una TIC especializada en soluciones para la venta al por menor y la industria financiera. Sus principales productos son: cajas (puntos de venta en… …   Wikipedia Español NCR CRAM — For other uses, see CRAM (disambiguation). CRAM, or Card Random Access Memory, model 353 1, was a data storage device invented by NCR, which first appeared on their model NCR 315 mainframe computer in 1962. A CRAM cartridge contained 256 3x14… …   Wikipedia NCR Corporation — Тип Публичная компания Листинг на бирже NYSE …   Википедия NCR Self-Service — NCR Self Service, a subsidiary of NCR Type Subsidiary Industry Technology Founded 1988, 2004 Headquarters Lake Mary, Florida Key people Theresa Heinz, President …   Wikipedia NCR Country Club — is a country club located in Kettering, Ohio, where NCR Corporation formerly was headquartered. There are two golf course s at the club, the North course and the South course. The 1969 PGA Championship was played on the South course, Raymond… …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”