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DEC GT40 is a VT11
vector graphic Vector graphics is a form of computer graphics in which visual images are created directly from geometric shapes defined on a Cartesian plane, such as points, lines, curves and polygons. The associated mechanisms may include vector display a ...
terminal Terminal may refer to: Computing Hardware * Terminal (electronics), a device for joining electrical circuits together * Terminal (telecommunication), a device communicating over a line * Computer terminal, a set of primary input and output dev ...
produced by the
Digital Equipment Corporation Digital Equipment Corporation (DEC ), using the trademark Digital, was a major American company in the computer industry from the 1960s to the 1990s. The company was co-founded by Ken Olsen and Harlan Anderson in 1957. Olsen was president un ...
, first introduced in October, 1972 (selling for “under $11,000”).IEEE Computer, 5(6), Nov. 1972, pp. 61–62
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Description

The DEC GT40 consists of: 090509 brouhaha.com * CPU: KD11-B ( PDP-11/10) * VT40 display processor, including bootstrap ROM (same modules as VT11, but instead of the four-slot backplane, this has a nine-slot backplane to include the CPU and memory) * MM11-L 8K word core memory (MM11-K 4K word core memory on GT40-Bx models) * DL11-E asynchronous line interface * LK40
keyboard Keyboard may refer to: Text input * Keyboard, part of a typewriter * Computer keyboard ** Keyboard layout, the software control of computer keyboards and their mapping ** Keyboard technology, computer keyboard hardware and firmware Music * Musi ...
* VR14-LC X-Y monitor (or -LD for 230 V) * 375
light pen A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's cathode-ray tube (CRT) display. It allows the user to point to displayed objects or draw on the screen in a similar way to a tou ...
Because the GT40 contained a PDP-11 class computer, the terminal could also serve as a computer in its own right, IEEE Computer wrote:
The GT40 may be used either as a stand-alone graphics system or as a remote terminal interacting with various types of host computers. John Mucci, marketing manager for the DEC graphic-11 group, sees the GT40 being particularly useful in the areas of graphic research, design, engineering, architecture business information systems and many other uses needing a fast, low-cost graphics display. In a stand-alone configuration, the PDP-11/10 within the terminal can be expanded with additional memory and any PDP-11 family peripheral to build as complex a system as necessary. “In fact, the central processor used in the GT-40 can be any PDP-11 family processor,” says Mucci, ”since the display processor is interfaced via the PDP-11's Unibus.”


Other models

Other versions, using different PDP-11 CPUs and/or video processors:


GT42

VT11 vector graphics terminal using a PDP-11/10.


GT44

VT11 vector graphics terminal using a PDP-11/40.


GT62

VS60 vector graphics workstation using a PDP-11/34a and VT48 graphics processor.


See also

* ''Lunar Lander'' (1973 video game) *
Vectrex The Vectrex is a vector display-based home video game console–the only one ever designed and released for the home market, developed by Smith Engineering. It was first released for the North America market in November 1982 and then Europe an ...
* PDP-11


External links


brouhaha.com/~eric - VT11 instruction set


References

GT40 PDP-11 {{compu-hardware-stub