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Encyclopedia > Tektronix 4014

The Tektronix 4014 was an early text and graphics computer terminal based on the company's own storage tube technology. The terminal was introduced by Tektronix around 1974. A computer terminal is an electronic or electromechanical hardware device. ... Now mostly obsolete, a storage tube is a special monochromatic CRT whose screen has a kind of memory (hence the name): when a portion of the screen is illuminated by the CRTs electron gun, it stays lit until a screen erase command is given. ... Tektronix is a United States corporation that is currently a major presence in the test, measurement, and measuring industry. ... 1974 is a common year starting on Tuesday (click on link for calendar). ...


Prior to the 4014, most computer graphics was done with vector graphics displays that continouosly repainted the image under computer control. This required a very high bandwidth connection to the computer, which generally meant the display could be no more than a dozen or so meters from the computer. The modern approach of having a local memory in the display that stores a value for each pixel would have been prohibitively expensive in the 1970s. Tektronix solved this problem by developing the Direct View Bistable Storage Tube (DVBST) CRT, which allowed the use of a slower, serial, data connection combined with a vector graphics generator that only needed to write the vectors (the graphic data) to the CRT once. Having had data written, the CRT itself remembered the data. Computer graphics (CG) is the field of visual computing, where one utilizes computers both to generate visual images synthetically and to integrate or alter visual and spatial information sampled from the real world. ... Steam Locomotive 7646 as a vector, originally Windows Metafile (converted to GIF for display on Wikipedia page). ... // Analog For analog signals, which can be mathematically viewed as a function of time, bandwidth is the width, measured in hertz, of a frequency range in which the signals Fourier transform is nonzero. ... This article needs to be cleaned up to conform to a higher standard of quality. ... This article provides extensive lists of events and significant personalities of the 1970s. ... DVBST was an acronym used by Tektronix to describe their line of Direct-View Bistable Storage Tubes. These were cathode ray tubes (CRTs) that stored information written to them using an analog technique inherent in the CRT and based upon the secondary emission of electrons. ... Cathode ray tube employing electromagnetic focus and deflection The cathode ray tube or CRT, invented by Karl Ferdinand Braun, is the display device used in most computer displays, video monitors, televisions and oscilloscopes. ... Serial is a term, originating in literature, for a format by which a story is told in contiguous installments in sequential issues of a single periodical publication. ...


Individual portions of the image could not be erased, however. Instead, the entire stored image was erased as a whole and the process caused the entire screen to flash bright green. This led to the 4014 terminal being nicknamed the mean green flashin' machine.


For graphics input, the terminal used a pair of thumb wheels on the keyboard to control the position of a cursor. The cursor was displayed using a lower intensity of the electron beam that was insufficient to store the cursor's image. Instead, the cursor was dynamically refreshed by the electronics of the terminal. Alphanumeric keyboards include typewriter and computer keyboards. ... Cursor is a term that frequently refers to a feature of a computer user interfaces. ...


The 4014 had a series of commands for drawing both text and graphics. The 4014 command set became a de facto standard and when personal computers with graphics displays became common in the 1990s, many communications packages included the ability to accept Tektronix 4014 commands. Because of this the designation "(Tektronix) 4014" has entered the traditional computing vocabulary, leading to the memory of the terminal long after the actual hardware became obsolete and otherwise disappeared. De facto is a Latin expression that means in fact or in practice. It is commonly used as opposed to de jure (meaning by law) when referring to matters of law or governance or technique (such as standards), that are found in the common experience as created or developed without... // Events and trends The 1990s are generally classified as having moved slightly away from the more conservative 1980s, but otherwise retaining the same mindset. ...


The 4014 was not the first computer terminal to use Tektronix storage tubes. An earlier device was called ARDS for Advanced Remote Display Station and originated at MIT's Project MAC. The Massachusetts Institute of Technology, or MIT, is a research and educational institution located in the city of Cambridge, Massachusetts, USA. MIT is a world leader in science and technology, as well as in many other fields, including management, economics, linguistics, political science, and philosophy. ... Project MAC, later the MIT Laboratory for Computer Science (LCS), was a research laboratory at MIT. Project MAC would become famous for groundbreaking research in operating systems, artificial intelligence, and the theory of computation. ...


Tektronix 4014 and 4014-1 Computer Display Terminal User's Manual


  Results from FactBites:
 
Tektronix at AllExperts (745 words)
Tektronix is a United States corporation that is currently a major presence in the test, measurement, and measuring industry.
Tektronix instruments enjoyed a leading position in the test and measurement market for decades, basically beginning with the firm's first cathode ray oscilloscopes.
Tektronix instruments contributed significantly to the development of computers and communications equipment and to the advancement of research and development in the high-technology electronics industry generally.
Tektronix 4014 at AllExperts (475 words)
The Tektronix 4014 was an early text and graphics computer terminal based on the company's own storage tube technology.
Tektronix solved this problem by developing the Direct View Bistable Storage Tube (DVBST) CRT, which allowed the use of a slower, serial, data connection combined with a vector graphics generator that only needed to write the vectors (the graphic data) to the CRT once.
The 4014 command set became a de facto standard and when personal computers with graphics displays became common in the 1990s, many communications packages included the ability to accept Tektronix 4014 commands.
  More results at FactBites »

 
 

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