RU1807517C - Label forming unit - Google Patents

Abstract

Usage: the field of automation and computer engineering, information output systems from computer. The inventive device contains two triggers, one synchronization unit, one register, two counters, one AND element, two OR elements, one inhibit element, two multiplexers, two random access memory blocks, two blocks of AND elements, one block of OR elements, one pulse shaper. 1 ill.

Description

The invention relates to the field of automation and computer engineering and can be used to output information from a computer.

The purpose of the invention is to increase the speed of the device.

In the drawing, a functional diagram of the device is presented.

The device contains a synchronization unit 1, register 2, counters 3 and 4, multiplexers 5 and 6, a RAM unit 7 and 8, a pulse shaper 9, triggers 10 and 11, an element 12 AND, elements 13 and 14 OR, an element 15 of prohibition, blocks 16 and 17 elements OR. block of 18 elements I.

Numbers 19 and 20 indicate the inputs of the recording control signals of the device, 21 - installation input, 22 - information inputs, 23 - address inputs, 24 - input of the control signal of the marker type, 25 - signal output, 26 - information output of the device.

The device operates as follows.

The device forms a marker on the screen of a television indicator (not shown in the drawing) in the form of a rectangle or mutually perpendicular lines in the area of this rectangle. In order to generate a backlight signal arriving at the video input of a television indicator, it is necessary to select raster points that make up the displayed object.

For each point of a television raster, three states are possible that characterize a given point: a point belongs to a rectangular shape, a point belongs to mutually perpendicular lines, a point does not belong to any of the displayed objects.

Thus, in order to encode the three states of each raster point, two bits are needed: 01 - for the points making up a rectangular figure; 10 - for points making up a mutually perpendicular line; 00 - for points that do not belong to any of the displayed objects.

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Information about the raster points in encoded form is entered and stored in blocks 7 (X axis) and 8 (Y axis) at the addresses corresponding to the positions of the points on the CRT screen of the indicator. When displaying the data read from blocks 7 and 8, the code enters the logic of generating the illumination signal of the rectangular figures and mutually perpendicular lines in the former 9.

Preliminarily, the device is reset. For this, the signal at input 21 of trigger 10 is set to 1. The signal of the frame clock from the third output of block 1, which is input to the clock input of trigger 11, rewrites the single state of trigger 10 into it. As a result, the recording control inputs of blocks 7 and 8 through elements 13,14 OR, respectively, a signal is received that permits the recording of a zero code at the addresses generated by the counters 3 and 4 operating in the information scanning mode. The signal of level O from the output of trigger 11 goes to the input Set 0 of trigger 10 and resets it, which leads to the appearance of a single signal at the input of element 12 AND. The next frame sync signal sets trigger 11. to O. After that: a signal with level 1 appears at the output of element 12 AND, which goes to input 25 as a signal to finish cleaning the RAM of the device and means that all cells the memories of blocks 7 and 8 are cleared. Thus, the device is in the initial state. :

When constructing mutually perpendicular lines, the code 10 is set on the two-bit input bus 22 and the value 2 corresponding to the X coordinate of the points making up the vertical line is entered into register 2 along the bus of the address 23 input.

According to the signal during the reverse passage through the frame switching the address inputs of block 7 through the multiplexer 5 to the inputs of register 2, the control signal at input 19 records code 10 into block 7. The code 10 is written to block 8 in the same way, according to the control signal at the entrance 20.

Then, the input 01i is set on the two-bit data bus of the inputs 22 to construct a rectangular figure. According to the ready signal, the code 01 of the points making up two vertical segments is recorded in block 7 at the addresses corresponding to the coordinates of these points along the X axis. The code of 01 points making up two horizontal segments is recorded in block 8 in the same way at the addresses corresponding to the coordinates these points along the y axis.

When information is displayed while the beam is moving along the line, clock pulses from the output of the synchronization unit 1 corresponding to each displayed point are fed to the input of counter 3 (points in the line). The signals from the outputs of the counter 3 through the multiplexer 5 are fed to the address inputs of block 7. When switching to a new line in synchronization with the operation of the deflecting system

the horizontal sync pulse from the output of block 1 goes to the input Set 0 of counter 3 and resets it to the zero state.

Thus, when each new line is displayed, the process of reading the code

from block 7 is repeated.

Reading the code from block 8 (axis Y) is carried out similarly, moreover, to the address inputs of block 8 through the multiplexer 6

signals from the outputs of the counter 4

(lines in a frame), in which horizontal sync pulses are fed to the counting input, and frame sync pulses from the output of block 1 are input to Set 0.

More details, zeroing (clearing) the memory

carried out as follows. After setting the trigger 11 to a single state, the element 15 prohibits the transmission of information from inputs 22 to blocks 7.8, thereby achieving the possibility of an external system.

through the public channel to work with other devices during the independent (autonomous) cleaning of the memory of blocks 7.8.

At the same time, the memory cleaning time is reduced due to the simultaneous supply to the blocks 7.8 of both the command to enable the recording of zero information of the element 15 from the trigger 11 through the elements 13, 14, and the addresses of the counter 5 in the block 7 directly, and in

Claims (1)

block 8 - through blocks 16, 18. In one line, the clock pulses of block 1 manage to reset all cells of blocks 7 and 8 simultaneously. The invention achieves an increase in the speed of the device, and also expands the scope of its application by using it additionally in systems with a public channel. SUMMARY OF THE INVENTION Device for forming a marker. containing the first and second triggers, the AND element, the first and second OR elements, a synchronization unit, the first output of which is connected to the counting input of the first counter, the second output to the input Set 0 the first counter and the counting input of the second counter, the third output is connected to the input Ust, 0 of the second counter, the clock input of the second trigger and the control inputs of the first and second multiplexers, the information inputs of the first groups are connected to the outputs of the register, and the information inputs of the second groups are with the outputs of the first and second counters respectively, the information inputs of the register are the address inputs of the devices wah, the outputs of the first multiplexer are connected to the address inputs of the first random access memory block, control input the recording of which is connected to the output of the first OR element, the output of the second OR element is connected to the recording control input of the second random access memory block, the outputs of the first and second blocks memory are connected to the information inputs of the pulse shaper, the control input of which is the input of the control signal — a marker type, and the output is the information output of the device, the first output of the first trigger is connected to the first input of the element And, the output of which is a signal output device, the second output of the first trigger is connected to the information input of the second trigger, the first output of which is connected to the second input of the AND element and the input Set 0 of the first trigger, setting the input of which is the installation input of the device, the second output of the second trigger is connected to the first inputs of the first and second OR elements, the second inputs of which are inputs of the recording control signals of the device, characterized in that, in order to increase the speed of the device, it contains a prohibition element; the first and second blocks of OR elements and the block of AND elements, the outputs of which are connected to the address inputs of the second block of random access memory, and the inputs - with the outputs of the first and second blocks of OR elements, the inputs of which are connected respectively to the second and first outputs of the second trigger, and the inputs of the group are connected to the outputs of the first and second multiplexers, respectively, the outputs of the inhibit element are connected to information inputs of the first and second RAM blocks, the information inputs of the inhibit element are the information inputs of the device, and the control input is connected to the second output of the second trigger, the input of which is connected to the second output of the synchronization block.