SU1525727A1 - Device for display of information - Google Patents

Abstract

The invention relates to automation and computing and can be used to build displays of personal computers. The purpose of the invention is to increase the speed of the device. The goal is achieved by introducing the element NOT and the corresponding functional relationships. The invention makes it possible to reduce the time of entry and change of the alphabet of displayed symbols and to expand the graphic capabilities of the device for displaying information, since allows you to receive images that contain not only the symbols provided for and entered into the device in advance, but also the symbols, the need for which appears during the operation of the computer. The high rate of change in the alphabet of symbols makes it possible to use the invention not only for displaying various kinds of alphanumeric and graphic information, but also for synthesizing images using predetermined algorithms. 1 il.

Description

The invention relates to automation and computing and can be used to build displays of personal computers. The purpose of the invention is to increase the speed of the device by reducing the alphabet selection time; displayed characters.

The drawing shows a block diagram of the device.

The device for displaying information comprises a pulse generator 1, a counter 2, a synchronization unit 3, a standard television signal shaper 4, a television receiver 5, a first multiplexer 6, a first RAM block 7, a second multiplexer 8, a second RAM block 9, the element NOT 10, fixed memory block 11.

Positions 12-14 in the drawing denote address control, informational, respectively, the device inputs.

The device works in the following way.

The position of the electron beam on the screen of the television receiver 5 is completely determined by the state of the rutter 2 pulses arriving at its counting input from the generator 1, the masses of which are chosen based on the required size of the decomposition element. At the moments of the termination of lines and frames of the Television raster, the synchronization unit 3 generates horizontal and vertical synchronizing and fading pulses arriving at generator 4 of a standard television signal. To another entrance

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bodies 4 from the block 11 of the permanent memory: or the second block 9 of the operative unit; an information word arrives, each bit of which contains information about the luminance of the corresponding part of the displayed symbol in the given raster line.

The information displayed on the screen is contained in the first RAM block 7 in the form of codes of displayed characters. Moreover, the exact address of the character whose code is stored at this address on the screen corresponds to the address of this memory block. Changing the contents of the primary memory block 7 changes the image to; screen and is made by writing down the IB code of a new character carried out by connecting using the multiplexer 6 of the address ykhoda | first block 7 of the operative memory JK to the address input 12 of the device and giving it to it, as well as the information inputs 14 and the control input | 13 with matching codes and commands. In the mode of displaying the information I, a signal is received from the address inputs of the first block 7 of the RAM; CO of the counter 2. At the output of the first block 7 of the operative memory, a code of the displayed symbol appears: which, together with the code received from the counter and the corresponding line number of the decomposition form; the displayed character, is fed to the block 1 of permanent memory and through the second multiplexer 8 to the second block 9 of the RAM. In the proposed device, the RAM block 9, like the block 11 of the permanent memory, is used as a character generator. In block 11 of the persistent memory, the most frequently used universal symbols are stored. Using the second memory unit 9 allows displaying any characters on the television receiver 5 and promptly changing the alphabet of characters. Writing information corresponding to the new characters in the second memory block 9 is performed in the same way as recording information in the first memory block 7 using the second multiplexer 8. Selection and connection to the input of a standard television signal generator

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4 of one of the memory blocks, character generators, in which information on the alphabet of symbols is stored, is performed by applying a corresponding signal to the control input of the fixed memory unit 11 and through the element NOT 10 to the analogous input of the second memory unit 9.

The use of a second RAM block allows the microprocessor to programmatically and at high speed you, in addition, to modify and change the alphabet of displayed symbols, which greatly expands the scope of the display device. For example, in contrast to the prototype, the proposed device allows displaying any number of graphs with previously unknown coordinates of points on the screen.

The time it takes to replace one character with another, not included in the original alphabet, depends on the type of microprocessor and its clock frequency. For the KP580IK80A microprocessor (f 2 MGP), this time does not exceed 7.p ISS, where n is the number of lines of the decomposition format, in which the displayed symbol is synthesized

Claims (1)

Formula of invention A device for displaying information containing a pulse generator, the output of which is connected to the counter input of the counter, the first output of which is connected to the input of the synchronization unit, the output of which is connected to the synchronous input of the standard TV signal generator, the output of which is connected to the input of the television receiver first and multiplexers, the first and the second memory block, the block of permanent memory, the first information input of the first multiplexer is connected to the second output of the counter, the second information the input of the first multiplexer is the address input of the device, and the control input is the control input of the device, the output of the first multiplexer is connected to the address input of the first RAM block, whose information input is the information slot of the device, the address and control inputs of the first RAM block These are connected respectively to the address and information inputs of the device, the first address input of the memory block is connected to the third output of the counter, the first control input of the second block How the RAM is connected to the control INPUT of the device, characterized in that, in order to increase the speed of the device, it contains an element NOT, the input of which is connected to the control input of the device, and the output is connected to the second control input of the second memory block, the information and address inputs of which are connected respectively to the information input of the device and to the output of the second multiplexer, the first address and control inputs of which are connected respectively to the address and control inputs devices, and the information and second address inputs of the second multiplexer are connected respectively to the output of the first main memory unit and the first one by the address input of the permanent memory unit, the second address input of which is connected to the output of the first memory block, the output of the permanent memory unit is connected to the output of the second memory unit, which is connected to the information input of the standard television signal.