SU1059562A1 - Device for displaying information onto crt screen - Google Patents

Description

The invention relates to automation and computing, and g devices for outputting alphanumeric information to a screen of a cathode ray tube can be used. .

. A device for displaying information on a screen of a cathode ray tube is known, comprising successively connected memory blocks, a symbol generator, a beam control unit and a cathode ray tube, as well as a clock generator connected directly and through a row counter to a frame memory block and a memory block. lines and connected to the Symbol Generator and the control unit. ray, in which the series-connected digital-to-analogue converter are additionally entered; and the comparison unit, with the frame memory block s is connected to the comparison unit, communication with the meter zannomu strings, numbers. a analogue converter coupled to the clock generator and a beam control unit, to, a match block associated with the line memory block | 1.

The disadvantage of this device is the limited scope due to the fact that it has difficulty composing texts with a constant component (headers, tables, etc.).

The closest in technical essence to the present invention is a device for displaying information on the screen of a cathodetractive tube, containing {) a serially connected symbol memory block, as well as a control unit connected to the symbol memory block, a register, a symbol generator, and through a module block with a cathode ray tube unit, a raster memory unit connected to the control unit and register 2j.

A disadvantage of the known device is also (in a limited field of application due to the fact that it is difficult to compose texts with a constant component. Headings, forms of forms, table columns, if they are repeated in sequentially composed texts, come each time re-enter into the device from the information system 1 together with the variable component of such texts (for example, last names, indicators, etc.).

The purpose of the invention is to expand the field of application of the device.

The goal is achieved by the fact that in the device containing the first connected in series

a memory unit, a first register and a symbol generator, a second memory unit, a control unit, the first input of which is connected to the first memory unit, the second output is a second one

5 memory block, the third output - with. the third input of the first register, the sixth and seventh outputs - with the symbol generator, the ninth output connected to the CRT modulator, the second memory block connected to the second input of the first register, entered the second register, And the element OR, the output of which is connected to the monitor module of the CRT, the output of the second register is connected to the input of the control unit, the input of the OR element is connected to

the outputs of the elements of the first and second groups, the outputs of the elements 20 of the third group are connected to the fourth "input of the first register, the first inputs of the elements AND of the first group are connected to the second output of the first register, the first inputs of the elements and the second and third groups are connected to

the output of the symbol generator, the second inputs of the AND elements of the first, second and third groups are connected respectively to the fourth, fifth and eighth outputs of the control unit.

In the proposed device, the compilation of texts having a constant component is facilitated. Headings, forms of forms, columns of tables, if they are repeated, there is no need to re-enter each time from the information system i

together with the variable component of such texts (e.g., last names, indicia, etc.).

40 FIG. 1 shows a block diagram of the proposed device; in fig. 2 is a block diagram of the control unit.

The device contains the first block

45 1 memory, the second memory block 2, the first register 3, the 4-character generator, which contains the permanent memory block 5, and the raster line generator 6, the modulator 7, the electron-beam tube 8, the control unit 9, the first group of AND elements 10, the second group of elements And 11, the third group of elements And 12, the element OR 13 and the second register 14.

55 The control unit (Fig. 2) includes a synchronization pulse generator 15, an analyzer 16, coordinate counters 17, a count of 18 addresses of the raster memory, a counter 19 of the address of the symbol memory, a trigger 20 of the device.

The generator 15 pulses synchronization is used to generate pulses that synchronize the work

65 total device. From its output, the pulses go to the inputs of the coordinate counters 17, the counter 18 of the raster memory addresses, the counter 19 of the characters memory and the analyzer 16. The counters 18 and 19 form the addresses of the memory cells needed for organizations to write and read the displayed information. The analyzer 16 monitors the state of the counters 17-19, the generator 15 of synchronization pulses. Based on the results of the analysis, control signals are generated that are output from the analyzer to the inputs of the units of the device. By means of coordinate counters 17, the current position of the electron beam of the cathode ray tube is monitored. The device status information is stored using the device status triggers 20.

The device works as follows.

Through the register 3 character codes in the mode of exchange with the information system; arrive at the input of the first oloka 1 Psi ty. In block 1, they are written into consecutive cells in the order of arrival at its input. According to the signals from the output of the control block 9 in the raster generation mode, they are selected from block 1 and pass through; and alternately through register 3 into the generator of 4 symbols.

From the output of block 5 of the permanent memory, the codes corresponding to the rows of the raster of the television decomposition of characters enter the former of the raster line b and through it into the third group of elements 12 and register 3 into the second memory block 2.

 In the raster registration mode, informational words are K / Tbit long with register 3, the first group of elements AND 10 and the element OR 13 are sent to modulator 7 (k is the number of characters in the image line; t is the length of the line video code of one character) At this time the second group of elements And 11 signal from the output of block 9 is closed. From the output of the tube 8, the modulator 7 is interrogated and the image is displayed on the screen. With the help of the second group of elements And 11 and the element OR 13, the device implements the fourth mode of operation. In this mode, using the third group of elements And 12, the connection between the output of the 4-character generator with register 3 and further with the memory block .2 is broken. Using the second group of elements AND 11 and elements OR 13, hpnma establishes a connection between generator 4 and modulator 7.h

Establishing direct communication of the 4-character generator with the modulator 7, the connection through the register 3 and the memory block 2, allows displaying information directly from the output of the generator 4 by codes from the block on the screen of the cathode-ray tube. 1 memory. ,

Switching modes is provided with the help of register 14 and block 9 of control by signals from the outputs of the information system.

0

The regeneration of the raster in the fourth mode is carried out due to repeated repeated polling of the contents of memory block 1.

If the image formed on the screen of the electron-beam tube consists of a constant (repeated from image to image) and variable (new in each image) components, initially

0 in the block-1 memory from the information system, a constant component is entered, for example, the text of the formula. From block 1 this constituent is in the usual way through register 3, block 5,

5, the former 6 and the additional element 12 are inputted into the memory unit 2. From block 2, it is in the usual way through register 3, the modulator 7 and the additional elements 10 and 13 are displayed on the screen of the ray tube 8. This is then erased. A variable component of the image is recorded in its place (in those memory cells of block 1, which correspond to

5, its location in the full image, consisting of the constant and variable components. The location of the variable component is determined by the information system. Thus, the constant component of the image is recorded in block 2 of the memory, variable in the memory block 1 of the memory.

Each of the constituent images5 may not be displayed on the screen.

cathode ray tube separately. The type of information displayed is given by register 14 and elements 10, 11, and 12, which are k5T

0 to organize the mode of regeneration of the raster as usual - using -. block 2,, or in the fourth mode - using block 1.

five

If there is no need for a separate display, the AND 12 logic elements are closed and the AND 10 and 11 logical elements are opened simultaneously.

0, synchronous polling of blocks 2 and 1 is performed. In this case, raster strings with a length of K-W bits go to modulator 7 simultaneously from the generator 4 output and through register 3 from the output of memory block 2.

five

Prohol through elements And 10 and 11 and the element-OR 13.

Thus, it is possible to combine the constant and variable components of the image.

In block 1, information can be memorized multiple times with the same volume of block 2. As the content of block 2 is needed, it can be completely or partially recorded, and the recording of information in this block is resumed.

When working with images that have a constant component in the device - the base object, you have to write each time in the character memory block the full set of characters corresponding to the entire image. In E. THOMA there is no need for the proposed device. Here it is possible to use the same constant component in several images, for example, a text heading, if necessary, this part of the image can be enlarged. All this makes it possible to significantly simplify the compilation, for example, of texts, to increase the labor productivity of operators, information systems working on data preparation.

The proposed device has a wider scope than the known one.

Claims (1)

DEVICE FOR DISPLAYING INFORMATION ON THE ELECTRON BEAM TUBE (CRT) SCREEN, containing the first memory unit in series with the first register and the character generator ₍ second memory unit, control unit, the first output of which is connected to the first memory unit, the second output to the second » ! a memory block, the third output - with the third input of the first register, the sixth and seventh outputs - with a symbol generator, the ninth output is connected to the CRT modulator, the second memory block is connected to the first register, characterized in that, with the aim of expanding the region To apply it by combining the constant and variable components of the image, it contains the second register of the first, second and third groups of AND elements, the OR element, the output of which is connected to the CRT modulator, the output of the second register is connected to the input of the control unit, the input of the OR element is connected to the outputs the elements of the first and second groups, the yields of the elements of the third group are connected by the fourth input of the first register, the first inputs of the first elements of the first group are connected to the second output of the first register, the first inputs of the elements. And the second and third groups are connected to the output of the symbol generator, the second inputs of the elements And the first, second and third groups are connected respectively to the fourth, fifth and eighth outputs of the control unit. SI С © СП о N3>