SU419885A1 - TERMINAL DEVICE - Google Patents

Description

one

The invention relates to the field of automation and computing. The device can i6biTb used in systems that provide users with direct access to an electronic computer (computer) from their workstations.

A terminal device is known that contains a keyboard associated with an encoder and a high-frequency voltage generation unit, which is connected to an indicator and a decoder, and a character register.

The proposed device is characterized in that it contains a buffer register, a marker generation unit, a control phase generation circuit, a control circuit, and a control state register circuit. Moreover, the buffer register is connected to a symbol register, a decoder, a control circuit, a high-frequency voltage generation unit, an encoder, and a marker generation unit that is connected to the state register, the control circuit, and a keyboard connected to the control circuit and the state register. The latter is connected to a control circuit, a control circuit, a decoder and a character register associated with the control circuit, a control circuit and a control phase generation circuit, the input of which is connected to the control circuit and the control circuit. This allows a wider range of application of the device.

The drawing shows a block diagram of the proposed device.

The device contains a keyboard 1, a decoder 2, a marker generation block 3, a buffer register 4, a decoder 5, a high-frequency voltage generation block b, indicator 7, a character register 8, a control phase generation circuit 9, a control circuit 10, a register 11 states and control circuit 12.

The device works as follows.

A set of messages is produced on the keyboard. When any information key is pressed, the corresponding contacts on the output of the encoder 2 and the marker generation unit 3 are closed. At the output of the encoder, the character codes that go into the buffer register 4 are formed. The place where the character is written in the buffer: the register and on the indicator 7 indicate the block of marker production. Depending on the number of dialed characters, the marker’s output unit gives the resolving potential to a specific place in the buffer register, and lights a marker point on the indicator at the corresponding place.

The information recorded in the buffer register is continuously transmitted under the control of the decoder 5, which decrypts the contents of the buffer register and starts the corresponding blocking generators of the high-frequency generation unit eg. These

blocking generators and excitement. Illumination of the necessary digits, signs and: words and indicator.

Editing messages is carried out with (BY HELP "Step. Forward," Step "back," Erase and moving discretely on the indicator with schagom in one character the light marker point. The movement of the point is controlled by the marker development block 3. When you press any information key or “Step forward” key marker generation unit shifts it one character to the right, when you press the “Step backward” button, one SIMWAVE left. Thus, if you need to replace a previously recorded symbol with a new one, just use the “Step forward m” Step backward P Two hundred marker point at the characters and press the desired character. When you press "Delete entry in this location likvidiruets symbol. For failure of the entire recording, just press the keys" Early. installation.

Edited messages are automatically entered into the EMW when the user presses the Enter key. At the same time, the enable potential is applied to the state register 11, which generates a signal about the input request to the control circuit 12. Upon receiving such a signal, the control circuit sends a command to transfer the first character from buffer register 4 to register 8 and starts the control phase generation circuit 9. The exchange between the character register and the buffer register is carried out by a parallel code. The scheme of generating control phases supplies two inverse relative to each other phases (Ф ;. and Фз) to the shift of the symbol register, due to which the contents are shifted for all bits: x of the symbol register: to the communication line as a serial code .

The end of the symbol transfer cycle is registered by the state register 11, which outputs the corresponding signal to the control circuit 12. The control circuit sends a command to transfer a new character from the buffer register to the character register, etc.

Upon completion of the message input, the control circuit is notified of the status register upon receipt of the input end signal from the generation unit 3. In this case, the control circuit sets all the blocks to the initial state. Since only the information that is located in the buffer register to the left of the marker point is entered into the EMW, the user has the opportunity to specify the number of characters to be entered, for which, before pressing the Enter key, he must set the marker point to the desired place.

The contents of register 8 characters are constantly checked for parity by control circuit 10, which, in the event of an error or loss of a character, outputs a signal to state register 11. In this case, as well as in the event of a failure, the status register issues a signal to the control circuit 12, which in this situation prohibits further input, and the reason for the stop is highlighted on indicator 7.

The output of messages to the remote user terminal is similar to the input process. Upon receipt of the output from the dbM signal, the control circuit starts the control phase generation circuit 9, which ensures the reception of the serial code into the symbol register and its preoborization into the parallel code.

But the signal "The end of the cycle of receiving a character control circuit" sends the command to transfer the character from the register b to the buffer register with simultaneous sending "1 to the marker generation block 3, which indicates the place where the incoming characters are written. This process is repeated until such time as the control circuit from the state register does not receive a signal to end the message input or an irregular situation (failure, loss of a symbol, error, etc.). The response of the circuits to these signals on output is similar to their response to input.

There is also a terminal device in teletype mode. This mode is set using the "TTY. In this case, the input of information into the computer is performed by individual characters in the process of typing them on the keyboard 1. This mode is expedient when using universal programming languages, as well as, if necessary, the exchange of single characters.

In the filling of the indicator 7, in addition to the digits and operations signs, and. Has an array of service words and abbreviations. The topology of this array is such that it represents a fixed set of computer service messages. Thanks to this, the indicator, besides the display, performs the function of zonoing. The latter circumstance makes it possible to significantly reduce the amount of information sent, since instead of sending long word messages to the terminal device, it is enough to send their codes (one character). After the extension of these codes, a corresponding message like "Repeat message," No message, "Error in the exchange device is displayed on the indicator.

Subject invention

A terminal device comprising a keyboard associated with an encoder and a high-frequency voltage generating unit, which is connected to the indicator and a decoder, and a symbol register, characterized in that, in order to expand the scope, it contains a buffer register, a marker generation unit, a output circuit control phases, a control circuit, a control circuit, and a status register, the buffer register being connected to the sivol register, the decoder, the control circuit, the high-frequency voltage generating unit, the encoder, and the block generating a marker that is connected to the status register, control circuit and

a keyboard connected to a control circuit and a state register, which is connected to the control circuit, the control circuit, the decoder and the character register associated

with a control circuit, a control circuit, and a control phase generation circuit, the input of which is connected to the control circuit and the control circuit.