Feature connector

Feature connector

The Feature connector was an internal connector found mostly in some older VESA Local Bus, ISA and PCI graphics cards, but also on some early AGP ones.

It was intended for use by devices which needed to exchange large amounts of data with the graphics card without hogging a computer system's CPU or data bus, such as TV tuner cards, video capture cards, MPEG video decoders, first generation 3D graphic accelerator cards and the such.

Several standard existed for "feature connectors", depending on the bus and graphics card type. Most of them were simply an 8, 16 or 32-bit wide internal connector, transferring data from and to the graphics card to another device, bypassing the system's CPU and memory completely.

Their speeds often far exceeded the speed of normal ISA or even early PCI buses, (e.g. 40 MB/s for a standard ISA-based SVGA, up to 150 MB/s for a PCI or VESA-based one, while the ISA and VESA bus had much lower or barely as much bandwidth, with such figures being far beyond the capabilities of e.g. a 386, 486 or barely handled by an early Pentium.

Depending on the implementation, it could be uni or bi-directional, and carry analog color information as well as data. Unlike analog overlay devices however, a feature connector carried mainly data and essentially allowed an expansion card to access the graphics card Video RAM directly, although directing this data stream to the system's CPU and RAM was not always possible, limiting its usefulness mainly for displaying purposes.

Although its use rapidly declined after the introduction of the faster AGP internal bus, it was, at its time, the only feasible way to connect certain types of graphics-intensive devices to an average computing system without exceeding the available CPU power and memory bandwidth, and without the disadvantages and limitations of a purely analog overlay.

The idea of accessing a video card's memory directly has recently resurfaced with the introduction of the Scalable Link Interface (SLI) technology by NVidia, although this technology is aimed at connecting two equally powered and complete graphic cards in order to produce a single, increased performance visual output, and not e.g. directly interfacing TV tuner cards.

External links

* [http://computing-dictionary.thefreedictionary.com/VESA+Advanced+Feature+Connector Definition of VESA Advanced feature connection at thefreedictionary.com]
* [http://computing-dictionary.thefreedictionary.com/VGA%20feature%20connector Definition of VGA feature connection at thefreedictionary.com]
* [http://web.archive.org/web/20050210035518/http://www.ati.com/support/faq/amcvip.html AMC] , an ATI extension of the Feature Connector


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • Feature Connector —   [dt. »Merkmalverbinder«], heute nur noch selten verwendete Steckverbindung auf einer Grafikkarte, über die sie Signale mit einer anderen Steckkarte austauscht. Die Steckverbindung existiert zusätzlich zur normalen Verbindung zwischen Karte und… …   Universal-Lexikon

  • Feature connector — Видеокарта производства Paradise Systems под 8 битный разъем ISA, обладает разъемом типа feature connector (сверху) Feature connector ( Особый разъем или Специальный разъем ) внутр …   Википедия

  • Coaxial power connector — Most common coaxial power connector, male and female, 5.5 x 2.5 mm …   Wikipedia

  • Stage pin connector — Caution: this article discusses high and mid voltage wiring. Never work on a live circuit. If you are unsure of any electrical work consult a licensed electrician. Articles read on wikipedia do not qualify you to work on electrical equipment.A… …   Wikipedia

  • Modular connector — This article is about modular connectors. For the registered jack (RJ) wiring standard, see registered jack. Left to right, modular connectors: 8P8C plug, 6P6C plug, 6P4C plug, 4P4C plug, 6P6C jack …   Wikipedia

  • SCSI connector — A SCSI connector is a physical object used to connect together computer parts that use a system called SCSI to communicate with each other. Generally, two connectors, designated male and female, plug together to form a connection which allows two …   Wikipedia

  • DIN connector — This article is about the standard connector. For other uses, see DIN (disambiguation). Five pin male 180° DIN connector A DIN connector is a connector that was originally standardized by the Deutsches Institut für Normung (DIN), the German… …   Wikipedia

  • Nintendo Wi-Fi USB Connector — The Nintendo Wi Fi USB Connector The Nintendo Wi Fi USB Connector is an accessory, developed jointly by Nintendo and Buffalo Technology, which allows Nintendo DSi and Nintendo 3DS and Wii users without a Wi Fi connection or compatible Wi Fi… …   Wikipedia

  • TAE connector — TAE (Telekommunikations Anschluss Einheit) is the German standard for telephone plugs and sockets.The standard covers two TAE types: F ( Fernsprechgerät : for telephones) and N ( Nebengerät or Nichtfernsprechgerät : for other devices such as… …   Wikipedia

  • 600 series connector — A 600 series connector is an obsolete three pin connector with up to six conductors. It was for many years the standard telephone service (POTS) connector in Australia, but has now been replaced by the six position modular connector in this… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”