SU608151A1 - Device for interfacing digital computers - Google Patents

Description

one of the matching digital computers without interrupting the other digital computers.

This is achieved in that the device contains a control word register, a state word register, a register address decoder, a control block, a state word generator, a command decoder, a state word switch, a second output data switch, input address and data switches, a command switch and output address switch, the control word register output and information input of the status word register are connected to the device input-output, the address of the register address decoder to the first output of the control unit connected to the address, input and second level output of the device, the first input of the control unit is connected to the outputs of the status word register and the command decoder, the second input of the control unit is connected to the first output of the address comparison unit and the control output of the input converter neither the second output of the control unit through the condition word generator is connected to the code input of the status word switchboard, the second output of the control unit, and the first output of the control signal decoder They are connected to the control inputs of the second output data switch, status word switch, address output switch, output converter, whose information input is connected to the outputs of the status word switch, output address switch and second output data switch, second, third 18 outputs, first and second the addresses of the address comparison block are connected respectively to the code input of the output address switch, with the control input of the output switch converted to the output switch of the input switch Adr The ECU and the control output of the input converter, connected to the control inputs of the command and input switches, address and data switches, the outputs of the buffer register, the command switch, and the data switch, are connected respectively to the code input of the second output data switch, to the command decoder input and with the code input of the first output data switch, the control input of which and the control input of the buffer register are connected respectively to the second and spy outputs of the control decoder The signals, the code inputs of the command switch, the input address switches and the data are connected to the information output of the input converter, the first output of the control unit is connected to the information input of the control word register, the control inputs of the control word registers, and the status word connected to the register address decoder outputs.

The drawing shows a block diagram of the device.

A device for interfacing different types of digital computers contains a control word register I, a status word register 2, a register address resolver 3, a control block 4, a condition word generator 5, a command decoder 6, a buffer register 7, a control signal decoder 8, the first output data switch 9, address comparison block 10, state word switch 11, second data output switch 12, address output switch 13, address input switch 4, command switch 15, data input switch 16, output 17 and input 18 converters, stroke output 19, address input 20, second control output 21, first information input 22, second control input 23, first information output 24, first control output 25, second information output 26, a first control input 27,

second information entry 28.

Input-output 19, inputs 20, 22, 23 n outputs 2i, 24 devices connected to a small digital computer having an interface, for example, type 2K, and outputs 25, 26 and inputs 27, 28 of the device connected to a large digital computer having an interface, for example , type 2A (2B) or the input interface of the EU EC computer.

The device operates in three main modes: in the mode of establishing communication between the digital computer, in the mode of data exchange in the mode

termination of data exchange; in this case, the communication establishment mode and the data termination mode can be initiated by both large and small digital computers, and data exchange between digital computers is performed in the direction determined by the digital computers that initiate the communication mode.

The initiation of the establishment of communication of a large digital computer begins with the reception from the large digital computer via input 27 of the sampling signal and the address output signal, with input 28 of the address code

interface devices. The address code passes through the input converter 18, the switch 14, controlled by the address output signal, enters block 10 and is decoded. If the address of this interface device does not correspond to the received, then block 10, through output converter 17, sets a skip signal at output 25, the presence of which for a large digital computer means that the interface device did not take a sample .. If the received address code matches the address the interface device, block 10 sends a sampling signal to block 4. Unit 4 enters the state of establishing communication and, through output converter 17, sets the output of 25 to establish communication and output of the address at output 25, the latter also goes to the control input

switch 13. Simultaneously with these signals, block 10, through switch 13 and output converter 17, sets at output 26 a code for the address of the interface device. When receiving the address return code, a large digital computer removes the address code from input 28, and a sampling signal from input 27. After this operation, the interface is considered selected (a large digital computer, after which the large digital computer transmits the command code for the small digital computer to input 28 via input 27 — the output signal

Claims (2)

1. USSR author's certificate number 437075, cl. O 06 F 15/16, 1974. 2. “The coordinator 2К / 2А (2В) type A7I1-1. The complex of technical means M-6 () 00 ASVT-M. Catalog TSNIITEI instrumentation. M., 1974. a, ", ll