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Description

The invention can be used in computer interface devices with telegraph communication channels, ensuring the establishment of direct communication between computers and subscribers, as well as in devices for the usual input of information from a computer on an automated start-stop and controlled by means of a blocking, killing line connection.

Computer interface devices with a telegraph line are known, which contain a buffer register and a control unit with a code converter.

The aim of the invention is to eliminate the loss of inducible information.

This is achieved by interlocking the locking circuit between the teletype reader and the control circuit. An additional output of the control circuit directly and through the register of causes of interruptions is connected to the corresponding inputs of the computer.

The drawing shows a block diagram of the interface device.

The device contains blocks 1,. . ., n conjugations, in each of which the control circuit 2 is connected to the receiving unit, and through the blocking system 3 to the teletype transmitter. In addition, the control circuit 2 is connected to the registers of input 4 and output 5. The additional output of the control circuit 2 directly and through the cause register of interrupts 6 is connected

with inputs "Autobreak 7 and" Information 8 computers.

The posterior exchange of information between the interface and the computer is carried out

with the weakness of the nporpaMiMbi input-output (program monitor), which is stored in the random access memory of the computer. Each channel, regardless of the state of the other channels, can operate either in input mode.

information in the computer, or in the output mode.

In the information input mode in EVL1, each channel of the interface device operates as follows. In case of operator's importance, one of the teletype keys has a serial telegraph code 3 "through the communication line and the blocking circuit arrives at the first informational 1 INPUT of control circuit 2. Control circuit 2 records sequential

code into the input register, and then issues the "Input of information by which the status is set to" 1 the corresponding bit of this register. The bit size of register 6 is determined by the variety of channel accesses to the computer (input of information, output of information, and so on).

In addition to the “Information Input” signal, the control circuit 2 generates an auto-break signal,

 enters the device control computer. When the auto-break signal arrives, the computer control unit provides for suspending the computer (stopping the background program) and turning on the monitor program, if at the time of the auto-break signal the commands that prohibit accessing the computer are not executed. The monitor program provides control signals 1B ("Address and" Receive Information), which are fed to the control circuitry of 2 all channels. The interrupt reason registers of 6 all channels are assigned one common address. With the arrival of the control carHiles, the control circuit 2 reads the contents of the registers 6 into the computer. In the program, the monitor analyzes the contents of the cause registers of the interruption, and on the basis of this analysis, the computers sequentially generate control signals corresponding to the operation mode of each channel (channel address, reception or output of information). Each channel of the interface has a separate address. In the input mode of the computer, the signals of the channel address and the reception of information, on which the control circuit 2 of the corresponding channel reads the five-bit parallel code from register 4 to the computer, are sent to the interface device. The information received in the computer is written into the corresponding cell of the MOZU (magnetic random access memory), and then read from the same cell and written to the output register of the same channel. Before recording information into the computer output register, it generates the signals Channel Address and Information Issuing, according to which circuit 2 forgles signals that receive this sign on the output register, as well as the conversion of the parallel code into a serial code with the output of the latter by teletype for print. Thus, the operator has the ability to control the correctness of the information input, since only the information that has already been entered into the MOZU is printed on the teletype. If, when entering information from a computer teletype, it turned out to be occupied with performing some kind of long operation (accessing a magnetic tape, input from punched cards, etc.), then the character corresponding to the first pressed teletype key will be found in the input register and will be stored in it until no read signals are received from the computer (Channel Address, Reception Information). Repeatedly pressing the teletype key at this time destroys the information in the input register, since the blocking circuit closes the first information input of control circuit 2. With the arrival of read signals from the computer, the information stored in the input register will re-search the computer's MEZU and then print on teletype. At the moment when the starting parcel of the next character arrives, the blocking circuit unlocks the input of control circuit 2. The operator, noticing which sign was printed last on the teletype roll, can introduce new information. This eliminates the loss of input information. The device interface with the software allows the significant correction of previously entered information. In the output mode, the first character in register 5 is issued by a computer command. Before outputting the computer sign, the control signals the Channel Address, Information output, on which the control circuit 2 O. provides the reception of a parallel sign code to the output register, converting this code to a serial telegraph code and issuing it to the teletype receiver. When the output register is released, control circuit 2 issues a readiness signal to receive information to the cause register of interruptions. On this signal, the corresponding register bit of the cause of the interrupts is set to "1. In addition to the readiness signal, the control circuit 2 generates an auto-break signal in the computer, according to which the computer issues another sign. Then the cycle repeats. The subject of the invention is a multichannel interface device of a computer with telegraph communication channels, consisting of interface blocks, in each of which a control circuit is connected to a teletype receiver and transmitter and input and output registers connected to a computer, in order to loss of input information, between the teletype transmitter and the control circuit, the blocking circuit is turned on, and the additional output of the control circuit is connected directly to the corresponding inputs of the computer directly and through the register of causes of interruptions.

To teletype

A teletype

Signals 6 computers

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