:''"VT-05" can also refer to .''
The VT05 is the first free-standing
CRT
CRT or Crt may refer to:
Science, technology, and mathematics Medicine and biology
* Calreticulin, a protein
*Capillary refill time, for blood to refill capillaries
*Cardiac resynchronization therapy and CRT defibrillator (CRT-D)
* Catheter-re ...
computer terminal from
Digital Equipment Corporation introduced in 1970. Famous for its futuristic styling, the VT05 presents the user with an upper-case-only ASCII character display of
72 columns by 20 rows.
The VT05 was a smart terminal that provides cursor addressing using a series of
control characters, one of which allows the cursor to be positioned at an absolute location on the screen.
[ This basic system provided the basis of similar systems in the later and greatly improved ]VT50
The VT50 was a CRT-based computer terminal introduced by Digital Equipment Corporation (DEC) in July 1974. It provided a display with 12 rows and 80 columns of upper-case text, and used an expanded set of control characters and forward-only scro ...
and VT52 series.[
The terminal only supports forward scrolling and direct cursor addressing; no fancier editing functions are supported. No special character renditions (such as blinking, bolding, underlining, or reverse video) are supported.]bits per second
In telecommunications and computing, bit rate (bitrate or as a variable ''R'') is the number of bits that are conveyed or processed per unit of time.
The bit rate is expressed in the unit bit per second (symbol: bit/s), often in conjunction w ...
(although fill characters are required above 300 bits per second).
Internally, the VT05 implements four "quad-sized" DEC modules in a standard form-factor DEC backplane. The cards are mounted nearly horizontally over an off-the-shelf CRT monitor.[ The terminal is 19" wide and 30" deep (much deeper than a typical desk).][
The keyboard used advanced capacitive sensors, but this proved to be unreliable and later keyboards use a simple four-contact mechanical switch.
The VT05's dynamic storage is a PMOS shift register; the delays associated with manipulating data in the shift register result in the VT05 requiring fill characters after each line feed (as compared to contemporaneous hard copy terminals which require fill characters after each carriage return).][
The VT05 also has the capability of acting as a black-and-white RS-170-standard video monitor for videotape recorders, cameras, and other sources. The VT05 is equipped with a video input, and can superimpose its text over the displayed video, making it suitable for interactive video systems.
The VT05 was eventually superseded by the ]VT50
The VT50 was a CRT-based computer terminal introduced by Digital Equipment Corporation (DEC) in July 1974. It provided a display with 12 rows and 80 columns of upper-case text, and used an expanded set of control characters and forward-only scro ...
which itself was quickly superseded by the VT52.
Commands
The VT05 has a limited command set:
The screen can be cleared by sending GS and then US.
References
External links
VT100 net
DEC VT05
Terminals Wiki
*
{{Digital Equipment Corporation
DEC computer terminals
VT005
Computer-related introductions in 1970