The VT05 was the first free-standing CRT computer terminal from Digital Equipment Corporation. Famous for its extremely futuristic styling, the VT05 presented the user with an upper-case only 5x7 dot-matrix display of 20 rows by 72 columns. The terminal only supported forward scrolling and direct cursor addressing; no fancier editing functions were supported. No special character renditions (such as blinking, bolding, underlining, or reverse video) were supported. The VT05 supported asynchronous communication at baud rates up to 2400 bits per second (although fill characters were required above 300 bits per second). Cathode ray tube employing electromagnetic focus and deflection Cutaway rendering of a color CRT The cathode ray tube or CRT, invented by Karl Ferdinand Braun, is the display device that was traditionally used in most computer displays, video monitors, televisions and oscilloscopes. ... A computer terminal is an electronic or electromechanical hardware device used for entering data into, and displaying data from, a computer or a computing system. ... Digital Equipment Corporation was a pioneering company in the American computer industry. ... Asynchronous communication is sending data without synchronization to an external clock. ...

Internally, the VT05 was implemented using four "quad-sized" DEC modules in a standard form-factor DEC backplane. The cards were mounted nearly-horizontally over an off-the-shelf CRT monitor. The keyboard used advanced capacitive sensors, but this proved to be unreliable and later keyboards used a simple four-contact mechanical switch.

The VT05's dynamic storage was a PMOS shift register; the delays associated with manipulating the data in the shift register resulted in the VT05 requiring fill characters after each line feed (as compared to contemporaneous hard copy terminals which required fill characters after each carriage return). Mos is the singular form of the more commonly used plural noun Mores. ... In digital circuits a shift register is a group of registers set up in a linear fashion which have their inputs and outputs connected together in such a way that the data is shifted down the line when the circuit is activated. ... In computing, line feed (LF) is a control character indicating that one line should be fed out. ... Hard Copy was a tabloid news infotainment magazine show similar to Inside Edition and A Current Affair. ... Originally, carriage return was the term for the key, lever, or mechanism on a typewriter that would cause the cylinder on which the paper was held (the carriage) to return to the left side of the paper after a line of text had been typed, and would often move it...

The VT05 was eventually superseded by the VT50 which itself was quickly superseded by the VT52. The VT52 was a CRT-based computer terminal produced by Digital Equipment Corporation during the late 1970s. ...

SANTOSH MAHTO

External links

• VT100 net