SU732942A1 - Device for data display on the screen of cathode ray tube - Google Patents

Description

the outputs are to the inputs of the first permanent memory unit. According to the invention, the second, third and fourth registers, the second and third decoders, the comparison unit and the second permanent memory unit are entered. The inputs of the second memory block are connected to one of the outputs of the perOWX1X fixed memory unit connected to the paired input of the comparison unit and the outputs of the second and third decoders, the inputs of which are connected via the second and third registers to the first block of the constant memory. The outputs of the second memory block are connected to the inputs of the fourth register, the outputs of which are connected to the second inputs of the comparison block. The third block inputs are connected to the outputs of the first register, the output of the comparison flea is connected to the fourth output of the device.

The invention is illustrated in the drawing, in which the structural scheme of the proposed device is given.

The device contains a control block 1, a buffer memory block 2, the first register 3, the first) rator 4, the first constant 5 block 5, the control unit 6, 7 control voltages in the X and Y coordinates, the second and third registers 8.9 the second and third decoders 10, 11, the second block 12 of the last memory, the fourth 13, block 14 of the comparison. Positions 15-18 designate device outputs.

The device works as follows.

Under the influence of the set-point coming from the output C (control block. 1, register 3 is reset to zero. Then, under the influence of the signal from the output of cG block 1, register 3 is written from block 2 of the buffer memory to the character code representing is a number in binary code.

Under the influence of the contents of the register 3, the corresponding B111 output tire of the decoder 4 is selected. As a result, a series of rectangular imguls are induced on the output tires K, Chi Z of the first block 5 by the constant memory. Influenced by impulses induced in tires) (and Y, 4 or 1 (3), and G, 7 control voltages at the X coordinates and the corresponding pulses supplied to the CRT bias deflection system (not shown).

, induced in bus 2. is supplied to the etching electrode.

CRT. Under the influence of the voltages and pulses of the illumination controlling the electron beam, the corresponding character corresponding to the code equivalent in register 3 is reproduced on the CRT screen.

At the output of -Block 5 of the storage memory, clock pulses are applied to the control inputs of the second and third registers 8 and 9, and the information inputs of which are received by iBvinynbCH, induced in the X and Y buses. Clock pulses shift the contents of registers 8 and 9 and record the next value of the information

1g pulse to the lower bit of the corresponding register. Thus, by the time the symbol mapping ends in registers 8 and 9, the code equivalents of the symbol along the X and Y coordinates correspond to the sequences of pulses induced by X and Y. Since each symbol corresponds to c.vo, the sequence of pulses in X and Y is quite definite, the code equivalents in registers 8 and 9 are adequate to this symbol. These code equivalents are the address of the stitch code located in the second permanent memory unit 12 and corresponding to the code in register 3.

Claims (1)

Under the influence of the contents of registers 8 and 9, the second and third decipherors 10 and 11 at the moment of influence coming from the output g of block 5 to block 12 at the time of the end of the display of the symbol are read by the code equivalent of the symbol from block 12 to the fourth register 13. the same pulse compares the contents of the registers 3 and 13 in block 14 of the comparison. If the contents of the registers are the same, which indicates the reliability of the displayed symbol, then the signal from the inverse output of block 14 does not reach the output 18 of the device. If the contents of the registers do not match, then from the inverse output of the comparator block, the output 18 receives a signal indicating that the displayed symbol is valid; about the inadequacy of its code equivalents, and the passage of 5 chthsemus in the register 3. The formula of the invention Device for displaying information on the screen