RU18003U1 - INTERFACE FOR TWO ELECTRONIC COMPUTING MACHINES - Google Patents

Description

A device for interfacing two electronic computers

The proposed utility model relates to automation and

computer technology and can be used to pair two different-speed electronic computers (computers) or other data processing devices.

The prior art device for pairing two computers 1, the disadvantages of which are the presence of two blocks and the difficulty of controlling them.

A device for interfacing two computers 2 is known, the disadvantages of which are the complexity of the circuit-technical solution and the redundancy of the element base.

A device for interfacing two computers 3 is known, the disadvantages of which are the complexity of the circuit-technical solution and program control.

A device for interfacing two computers 4, which is selected as a prototype.

The purpose of the utility model is to expand the area

the use of a device for interfacing two computers, increasing the reliability and reducing hardware costs.

This goal is achieved by the fact that the following devices are entered into the device for interfacing two computers, containing the computer bus-1, the optocoupler isolation element, the computer bus-2: state register, data register, address decoder, unified control circuit, two optocoupler isolation units, power supply circuit. The computer bus-1 is connected to the output of the state register, with the first input of the data register, with the input of the address decoder, with the first input of the unified control circuit. Address Decoder Output

9001100022

JEWISH

G06F 13/00

MOU000-2 &

connected to the first input of the state register, with the second inputs of the data register and the unified control circuit. The output of the unified control circuit is connected to the second input of the state register, the first input of the optocoupler isolation element, and the third input of the data register. The output of the data register is connected to the first input of the first optocoupler isolation unit. The output of the second optocoupler isolation unit is connected to the third input of the state register. The output of the power circuit is connected to the second inputs of the first and second optocoupler isolation units and the optocoupler element. The EVM-2 bus is connected to the outputs of the first optocoupler isolation unit and the optocoupler isolation element, with the first input of the second optocoupler isolation unit and with the input of the power circuit.

In the drawing, Fig. 1 shows a block diagram of a device for interfacing a computer-1 with a computer-2, where a personal computer of the type IBM PC 486 DX4 is used as a computer, and a cable and circuit board KUST-4 is used as a computer-2.

This device contains: a computer bus-1 1, state register 2, data register 3, address decoder 4, unified control circuit 5, first and second optocoupler isolation units 6 and 8, respectively, optocoupler isolation element 7, power supply 9, computer bus- 2 10.

The proposed device for pairing two computers works as follows: the computer-1 analyzes the contents of the state register 2, for which the address and the read command are sent to the address decoder 4 on the computer-1 bus 1, which selects the state register 2 and gives a start pulse to the unified control circuit 5, read status register 2.

Upon receipt of the signal "start from KUST4 through the optocoupler isolation unit 8 in the state register 2, this signal, which is the signal" ready, is read in the computer-1. According to this signal, the computer activates the program for generating and outputting information in the format of the KUST-4 installation.

After a certain time delay set in the program, a command is sent from the computer to control circuit 5 to issue a data transmission strobe to KUST-4 through the optocoupler isolation element 7.

After a certain time delay set in the program, an address and a write command are sent to the address decoder 4 from computer-1, which selects data register 3 and gives a start pulse to control circuit 5, which allows writing information from computer-1 to data register 3. Information from Data register 3 is transferred to KUST-4 through the optocoupler isolation unit 6.

After a certain time delay set in the program and necessary for reliable reading of data in KUST-4, from computer-1 to the unified control circuit 5 a command is sent to remove the data transmission strobe and reset data register 3. This is the data transfer cycle from computer-1 in KUST-4 ends, which is reflected in the algorithm for transmitting the byte of information - drawing Fig. 2. Data transmission cycles will be repeated until the signal “stop and the signal is ready” is received from the KUST-4 through the optocoupler isolation unit 8 to the state register 2

For greater clarity, the drawing of FIG. 3 shows a timing diagram of the transmission of a byte of information from a computer-1 to KUST4, where 3

11 - signal "start from KUST-4,

12-signal "ready KUST-4 in the register

13-strobe data transmission in KUST-4,

14- information from the computer-1 to KUST-4,

15- signal "stop from KUST-4.

Used sources of information.

1. The author's certificate of the USSR No. 1571600, cl. G06F13 / 00, BI No. 22/90

2. The author's certificate of the USSR No. 1559351, cl. G06F13 / 00, BI No. 15/90

3. The author's certificate of the USSR No. 1649559, cl. G06F13 / 00, BI No. 18/91

4. The author's certificate of the USSR No. 1702379, cl. G06F13 / 00, BI No. 48/91

M & / M002Ј

Claims (1)

A device for interfacing two electronic computers (COMPUTER) containing a computer bus-1, an optocoupler element, a computer bus-2, characterized in that it contains a state register, data register, address decoder, unified control circuit, two optocoupler isolation units , power circuit, computer bus-1 is connected to the output of the state register, with the first input of the data register, with the input of the address decoder, with the first input of the unified control circuit, the output of the address decoder is connected with the first input of the status register and second inputs data register and a unified control circuit, the output of which is connected to the second input of the state register, the first input of the optocoupler isolation element, the third input of the data register, the output of which is connected to the first input of the first optocoupler isolation unit, the output of the second optocoupler isolation unit is connected to the third input of the state register , the output of the power circuit is connected to the second inputs of the first and second optocoupler isolation units and the optocoupler isolation element, the computer bus-2 is connected to the outputs of the first optocoupler isolation unit and the cient opto-coupler, the first input of the second unit and opto-isolator to the input of the supply circuit.