A pattern generation display system has a pattern code processing means, a refresh memory, a pattern generator and a pattern data processor. A pattern position on the raster scan display is defined by a base position datum and a displacement datum. The pattern code processor can calculate both of the position data as the address data for an effective operation. The refresh memory stores the code of a pattern and the displacement datum thereof at the address corresponding to the base position dat...

This disclosure relates to a video output circuit for high resolution character generation in a digital display unit. This output circuitry includes both character generation circuits and logic circuits, the latter of which fills in information bit areas adjacent to character bit areas which form a diagonal so as thereby to round out the character being displayed. In addition, the circuitry is adapted to change the position of such characters on the display screen so as to provide superscripts a...

A data input system of a multi-window mode in which a plurality of logic pictures can be displayed on a physical image screen of a CRT display. An input data once stored in a specified area of a memory is displayed in a selected one of the logical pictures. The system includes at least one logic picture designating device equipped with an indicator lamp, and transfer keys for designating one of the display fields in the logic picture. In accordance with combinations of designation and non-design...

Disclosed is a flat panel display control apparatus which has the same number of dots as those of a CRT display device in the vertical and horizontal directions, has compatibility with the CRT display device, and displays each character by a plurality of dots in a matrix form. The flat panel display control apparatus has a video memory for storing character codes of characters to be displayed, a pattern generator for generating a character pattern corresponding to the character code generated fr...

A direct access filter includes an array of memories for processing digital signal data from signal sources such as sensors in a radar system. The parameters in a packet are tested against a predetermined set of corresponding data. Each set of data can be considered as a window. If the value of each tested parameter falls within the window, then the packet matches the filter criteria. There can be several sets of filter criteria, and hence all sets must be sequentially tested. Upon finding a fil...

A video display terminal is disclosed for use in displaying images of data characters on a display screen. Multi-bit coded data words are supplied by a data source, such as a memory, to a character generator circuit which controls the display of data characters on the face of a video display screen. The coded data words generally fall into three categories; to wit, character codes, control codes and attribute codes. Character codes describe the type of character to be presented on the screen. At...

A screen of a scanning type display is divided both in the horizontal and vertical directions or abscissa and ordinate directions into a relatively large number of dots, so that the screen comprises an arrangement of dots (of the total number of the relatively large number by the relatively large number) arranged in the horizontal and vertical directions. The arrangement of dots of the screen is divided into columns each having a relatively small number of dots in the horizontal or abscissa dire...

A display refresh system wherein a RAM refresh buffer is tightly packed. Line start addresses in the buffer are determined by the line length such as eighty characters. With each of the lines in the refresh buffer being normally a binary number such as 128 characters in length the line start addresses are such that they do not coincide with the beginning of each line in the buffer. To assure packing they are interspersed each 80 positions sequentially within the buffer. A processor loads the add...

A graphics display system is disclosed including a memory circuit for storing vector data representing a graphics image, a raster memory circuit for rasterizing the vector data into a second memory for storage, and a processor for controlling the operation of the vector memory and raster memory circuits. The raster data can be displayed on a suitable cathode ray tube monitor, thereby displaying the graphics image on the monitor.

In a display system including a screen memory having a one-to-one correspondence to the characters to be displayed on a cathode ray tube or CRT, a character generator for generating a bit stream indicative of a character selected by an output of the screen memory and a CRT control circuit for generating the display addresses corresponding to the display positions on the CRT and the raster addresses for selecting the relation between the character block of the character generator and the scanning...