SU450204A1 - Device for displaying information on the screen of a cathode ray tube - Google Patents

Description

The invention relates to the field of automation and computer technology and can be used as an external device for digital computing edashin for outputting graphical and alphanumeric information to the screen of a electron beam tube (CRT).

Devices are known for displaying information on a CRT screen, soda (neighbors a character storage unit connected to memory recording and interrogation units and a vector code register connected to a beam illumination code decoder. Connected to a beam modulation unit and to a coincidence circuit, bipolar the current current keys of the coordinates X} i Y, connected respectively through the coordinate integrators and Y with amplifiers of horizontal and vertical beam deflection, a matching circuit connected to the integrators X and Y, memory polling recording blocks, register to yes vector and bus symbol code query.

The proposed device is characterized in that it contains code length and orientation code decoders, an assembly scheme and coding blocks of X and Y coordinates of the beam deflection, the vector code register is connected to the vector length and orientation code decoder, the outputs of the vector length code decoder are connected to one input .mi ko2

The X and Y coordinates of the deflection of the beam, the other inputs of which are connected to the vector orientation code decoder through the assembly scheme, and encoded; the J and Y coordinate deflection blocks of the beam deflection are connected to the corresponding X and Y coordinate current keys.

This makes it possible to reduce the number of microstates required for the image of symbols, to increase the speed of the device.

The drawing shows the block diagram of the described device.

The device comprises a symbol code reception bus 1, a recording unit 2, a symbol memory block 3, a memory interrogation block 4, a vector code register 5, a beam illumination code decoder 6, a beam modulation block 7, a decoder for the vector length code 8, a decoder 9 vector orientation code, assembly scheme 10, OR II -14 scheme, encoding unit 15, beam deflection coordinates X, AND 16-21 circuits, encoding unit 22 coordinates, Beam deviation, AND 23-28 circuits, dual current polarity keys coordinates X 29-31 and U 32-34, integrators of coordinates X 35 and U 36, amplifier horizontal 37 and vertical 38 deviations Matching scheme 39 and bus 40 request code code.

The device works as follows. In accordance with the sign code received by 3 -i-u,, no, the receive bus 1 in the recording unit 2 in the memory block 3-symbols current pulse is re-magnetized by a group of cores, stitched with an individual wire for this sign. At the end of the current pulse, the memory interrogation unit 45 is started, the current amplifiers of which sequentially re-circulate the cores of the unit 3 to the initial state. In each clock cycle of the outputs of the block 3B, the semizable register 5 of the vector code, the code of the next stroke is entered. At the same time, one of the outputs of the decoder 6 of the illumination code of the beam, one of the outputs of the decoder 8 of the vector length code and one of the outputs of the decoder of code 9 of the vector orientation is excited. If one of the outputs of the decoder 6 is excited, then the beam modulation unit 7 gives the voltage to the backlight, the level depends very much on the specifically excited output of the decoder. If it turns out that one of the matching schemes 16-21 of the Coding block 15 is the X coordinate of the beam deflection and one of the matching schemes 23-28 of the block 22 coordinates The beam deflection is selected. By one input, the excited 25 output of the decoder into the code of the length of the vector and through the “OR AND -14” schemes of assembly 10 — by the excited output of the decoder 9 of the vector orientation code, blocks 15 and 22 connect the bipolar current switches X 29-31 and У 32-34 of the co-direction of the beam deflection to the corresponding inputs. These keys control the charge (discharge) of the capacities of the integrators of the coordinates X 35 and Y 35 36 in accordance with the binary representation of the signals at their outputs. Control voltages from the outputs of the integrators 35 and 36, respectively, are fed to a horizontal amplifier 37 and a vertical 40 beam deflection. Upon completion of drawing the last vector belonging to the contour of the symbol, 20 4 coincidence circuit 39 AML simultaneous control of signals from the output of the decoder 6 of the beam illumination code and C output of the decoder 8 of the vector length code by the output signal discharges the integrator X and Y integrates recording unit 2, memory polling unit 4, perncTip 5 of the vector code and the symbol code request bus 40, for example, sends a request to the next computer to receive the next character, The subject invention The device for displaying information on the screen cathode tube, containing: a common symbol memory block, connected to the memory and olros memory blocks and the vector code register connected to the TOIPoM code of the beam illumination connected to the beam modulation unit and the coincidence circuit, two-polarity current keys X and Y Coordinates connected respectively through the X and Y coordinate integrators with horizontal and vertical beam deflection amplifiers, a Matching circuit connected to the X and Y coordinate integrators, memory recording and polling units, the Vector Code register and the code request bus. , characterized in that, in order to increase the speed of the device, it contains decoders for the length and orientation code, the assembly scheme and Coding, X and Y coordinate blocks of the beam deflection, the vector code register is connected to the decoders for the length code and orientation of the vector, the decoder outputs the vector length code is connected to one of the inputs of the X-axis coding blocks of the beam deviation, the other inputs of which are connected to the vector orientation code decoder through the assembly circuit, and the coding blocks of the coordinates A and G of the beam deflection are connected values to the corresponding bipolar current keys of X and Y coordinates.

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