SU633012A1 - Alphanumeric information display - Google Patents

Description

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ALPHABETO-DIGITAL INFORMATION uioro number of characters. This limits the ability to compile its modifications in terms of the amount of information displayed. The low speed is caused by the fact that each sign element is displayed with the participation of the microprocessor (and, in particular, of the program memory included into it), so when the sign is displayed on the indicator screen, the device cannot perform other operations (for example, selecting the next character to display text editing, etc.), as well as the low speed of operations as they are performed through a microprocessor with the participation of registers and triggers. Therefore, performing even the simplest operations (transferring information between blocks of a device, which is the most common operation during information processing) requires at least two measures: writing to: a register or a trigger transfer from the register to its intended purpose (by address); it is a consequence of the fact that applications for processing information from various devices are executed in a programmed way (by interruption). The purpose of the invention is to improve speed. In the proposed device, this is achieved by introducing a control unit, a character synthesis unit, a delay unit, a logic unit, a selector and a shaper of the initial address codes connected to the keyboard, the interface unit, the memory unit, the shaper of control signals and a delay unit connected to the control unit, connected to the interface unit, to the indicator, to the sign synthesis unit, connected to the electron beam tube and the selector, connected to the memory unit, control signal generator, register unit, loci interface, keyboard, block buffer memory and logic unit connected to the generator control signals and selectivity torus. The drawing shows a block diagram of the proposed device. The device contains a keyboard 1, a junction block 2, a block of buffer memory 3, a block of registers 4, an indicator 5, a shaper of initial address codes 6, a logical block .7. the selector 8, the memory block 9, the control 10, the delay block 11, the symbol 12 synthesis block and the driver of the control signals 13, the Keyboard .1 is intended for the set of alphanumeric information, the set of editing commands and the control of the display modes . The main keyboard outputs are connected to the selector 8 (bits of the alphanumeric information), the memory block 9 (bits of the operator's command code), the driver of the codes of the initial addresses 6 (the request signal). The interface unit 2 serves to communicate the display with external (with respect to the disperse device. It coordinates the devices according to the voltage levels, provides the accepted discipline for exchanging information with external devices. The outputs of the interface unit 2 are connected to the selector 8 ( information ports) and the driver of the codes of initial addresses 6 (request signals). The information inputs of the interface 2 are connected to the output of the selector 8, the control inputs are connected to the outputs of the driver of the control signals 13. In addition, the interface 2 with external devices received by a set of chains, (for example, chains of the joint NW according to GOST 18146-72). The buffer storage unit 3 is necessary for storing the information displayed on the indicator screen 5, the buffer storage unit 3 is connected by a set of control circuits control of writing and reading information, with the driver of the control signals 13, Information inputs connected to the outputs of the selector 8, address inputs to the outputs of the logic unit 7, information outputs to the inputs of the selector 8, Shaper of initial address codes 6 set It takes priority in fulfilling requests from external devices and indoor units. The outputs of the shaper of the initial address codes 6 are connected to the memory block 9 (binary code of the selected query number) and to the interface block 2 (positional features of the selected queries). The selector 8 is designed to combine information from all nodes and blocks of the device. The outputs of the selector 8, which is the exchange highway (MO), are connected to the information inputs of the main nodes and display units. The control inputs of the selector 8 are connected to the outputs of logic unit 7. In the memory unit 9, programs of exchange with external devices and a display information processing program are stored; register blocks 4 stores addresses and information; Logic block 7 modifies the addresses of the access to the block of buffer memory 56 3, determines whether conditions of le-rohods are received when executing commands. Indicator 5 is used to visually display information recorded in the block of buffer 3, in the form of alphanumeric characters on the screen of the electron beam tube or on the gas discharge panel. The inputs of the indicator 5 are connected to the outputs of the synthesis unit of the sign 12 and the delay unit 11. The synthesis unit of the sign 12 serves to convert the binary code to the control voltage (or current) for the synthesis of figures on the display of the indicator 5, the information inputs / 1y of the synthesis unit of the sign 12 are connected from the main lines of exchange, and the control inputs and outputs - with the delay unit 11. The delay unit 11 ensures the synchronization of the synthesis of the sign 12 and indicator 5 with each other, as well as with other display units, generates control signals of the indicator 5 image format, provides the necessary delay when issuing successive characters. The control unit 10 is designed to automatically install the display units to their original state in critical situations (after switching on at alarms, etc.). The input of the control unit 1O is connected to the delay block 11, and the output is connected to the blocks requiring initial installation by the delay block 11, the driver of the codes of initial addresses 6, the interface unit 2. To perform information acquisition operations of receiving information from external devices and others on the driver of codes the initial addresses Q receives a request signal (from the keyboard 1-for operations initiated by the operator — typing and editing text, controlling the marker; from the interface block 2 — for operations associated with external devices — receiving, transmitting and sending documenting information; from delay block 11 to display information). According to the request signal, the driver of the codes of initial addresses 6 generates the code of the request number. When simultaneously receiving the codes of the initial addresses 6 to the generator, requests to populate several operations are performed alternately in accordance with the established priority. After switching on the device, the control unit 1O sets the device to the initial state and issues a signal to the delay unit 11, which forms the start signal frame on the indicator 5 and with a 126 delay, sufficient setting the indicator beam at the beginning of the frame — a request to the start code generator 6. Forms (X) Vagel codes of initial addresses 6 starts the software by displaying the program launch code and the request number code. During the execution of this program, the contents of the first cell of the buffer memory block 3 are read and output to the sign synthesis unit 12, after which the last forms a voltage (or current) on the indicator 5 in accordance with the code of the received symbol. Simultaneously with the operation of the symbol synthesis block 12, the display program sets up the conditions for displaying the next symbol and generates a program end signal in the initial address code generator 6. When the character is written, the symbol synthesis block 12 issues a signal end signal to the delay block 11, which generates a request for the initial code generator addresses 6 to display the next character. When the last character is displayed, the first one is displayed again. As a result of such a ring, the display operation proceeds continuously. When displaying the last character in each line and the last character in the frame, the driver of the control signals 13 outputs to the delay unit 11 control signals, according to which the latter generates control signals to the indicator 5 to transfer the beam to the beginning of the next line and the beginning of the frame. Reception of information. In order to receive an ICF (interface from an external device (e.g., VM), the interface unit 2 enters into communication with this device according to the accepted exchange discipline and issues a request to the driver of the initial address codes 6 to receive the message, the P signals from the imager 6 start up message reception program. In this program, source data is prepared for reception in the buffer memory block 3 in accordance with the information source number and a permission signal is generated to the interface block 2 for receiving data bytes The interface block 2 receives one byte and issues a request to the shaper 6. By the signals from which the byte receiving program is executed. In this program, the character code is analyzed and, if the character is not control, the character code from the interface block 2 is written to the selected in the case of a control character, the reception area, the program branch is executed, which ensures that this control character is indicated. At the end of the byte reception program, a signal to receive the next byte is output to the interface 2. Marker control operations. Each of these operations is initiated by the operator by pressing the corresponding key on keyboard 1. From keyboard 1, a request is sent to shaper 6 and the operation code as a starting address to memory block 9, the control signal shaper 13 executes the program according to the request number and operation code . The operation of the set of alphanumeric information. On the keyboard 1, the dial key is turned on, after which the operator types the text in the same way as typing on a typewriter. When each character is pressed during typing from the keyboard 1, a request is sent to the shaper 6, the character code to the selector 8 and the operation code (in this case, a set of information) to the memory block 9, According to signals from the shaper 6, the control shaper 13 executes an information dialing program in which it writes a character code from keyboard 1 to a block of buffer memory 3 and prepares conditions for writing the next character. Editing operations. It is performed in the same way as a set of information and marker control. The difference lies in the program being executed, which is set by pressing the keyboard 1 key through the operation code. The transmission and documentation operad are carried out similarly to a receive operation with the participation of the interface unit 2, the former 6, the buffer memory 3 unit, the 9 local unit and the control generator 13 as a result of the joint operation of all the units of the device in the initial state Display 5 shows ma and spaces. As information is received from an external device or typed by the operator, this information is recorded in the buffer memory block 3 and is also displayed on the CRT screen in the form of alphabetic text; it is held until it is erased by the operator or an external device. Along with starting up, the output state after switching on the device of the control unit 10 automatically restores operation of the device when it fails. To do this, a power control unit 11 sends a signal to the control unit 10 when each character is displayed. In the absence of this signal for a predetermined time, block 1O generates a signal to set the device to its initial state. Since the mapping request passes through the shaper of the initial address codes 6 in the order of the queue with requests to execute other programs, if any of the programs does not reach the end (as a result of an incorrect operation), the next character is not displayed and after a certain the time is triggered by block 10. This restores the normal operation of the device in case of any accidental failures. In addition, the device control program for troubleshooting can be activated by a signal from the unit. When a program start signal is received from the shaper 6, the shaper of control signals 13 starts reading the program in memory block 9. The initial address of the program is the request number code received from shaper 6 and the operation code from the keyboard 1. For each program command read 13 generates control signals for executing a command. The above composition of the flowchart and communication allows the transfer of information between blocks (nodes), changing addresses, forming constants, analyzing the character code, re-encoding information, writing and reading the block of buffer memory 3, and others. the program. Information transfer can be made from any of the information sources (unit or node of the device), the outputs of which are input to the input of the selector 8, to any consumer (block or node), the inputs of which are connected to the selector 8 (exchange highway). For this purpose, the L driver 13 receives to the selector 8 a control signal that permits the passage of information from the desired direction, and a permission signal to the consumer, which the information must be received. The constants stored in memory block 9 are transferred by transmitting information from memory block 9 through selector 8 to

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To write a number (character) to the buffer memory block 3, the command that writes to logical block 7 must write the address at which it must (produce a record. In the write command, the shaper 13 fofpfpprests the resolution signal on the separator 8 and the write signal on the buffer memory block 3. At the same time, the address code from the logical block 7 is sent to the memory block 3. As a result, the code from the output of the selector 8 is written to the cell of the memory block 3 at the address from the logic block 7.

Similarly to a write, a block of buffer memory is read while simultaneously transferring the contents of the memory block to any block (node) —the consumer. Character code analysis can be

carried out on logic block 7 by comparing it with the standards.

In the proposed device, in comparison with izvesti11m, there are new blocks and nodes: a block of character synthesis, a shaper of initial address codes, a selector, a logic block, a control block and a delay block, as well as new connections between blocks and nodes. The presence of these new blocks and nodes, as well as new links between the blocks and nodes, provides a higher speed, which makes it possible to display more characters on the indicator screen, which is very important for a universal display.

The presence of a symbol synthesis block leads to an increase in speed, which makes it possible to perform any operations (for example, selecting the next character and J block of the buffer memory of the display, performing editing operations) simultaneously with the process of displaying the symbolJ of the selector and connecting the inputs and outputs of the selector with the main blocks and the nodes of the device, which makes it possible to transfer information between them during a single clock. in one microinstruction. It contributes to a significant increase in speed, since the operations for transfer in any programs calculator210

devices make up more than 5% ricf) x operations in programs; logical block oriented execution of operations in the display, ensuring a reduction in the cohesiveness of microcommands and, accordingly, a reduction in the execution time of the program; shaper codes of initial addresses, shortening the time to prioritize processing for maintenance. To increase the speed and reliability of the display is the presence of the control unit, automatically restoring the operation of the device in case of accidental failure.

Claims (1)

Invention Formula A device for displaying alphanumeric information containing a keyboard connected to a memory unit connected to a control signal generator connected to a buffer memory unit, a register unit and an interface unit, and an indicator, for example, an electron beam tube, characterized in that , in order to increase the speed of the device, a control unit, a character synthesis unit, a delay unit, a logic unit, a selector and a shaper of the initial address codes connected to the keyboard, interface unit, unit are entered into it. a memory, a control signal driver and a delay unit connected to a control unit connected to the interface unit, an indicator, a sign synthesis unit connected to a cathode ray receiver and a selector connected to the memory unit, a control signal driver, a unit registers, interface unit, keyboard, buffer memory unit and logic unit connected to the driver of the control signals and the selector. Sources of information taken into account in the examination: 1, USSR Author's Certificate No. 4O1991, cl. (OS F 3/14, 1973. 2, Patent. US number 37b0375, cl. 340-172.5, 1974.