SU1367018A1 - Device for interfacing microcomputer trunk line with trunk line of peripheral devices - Google Patents

Abstract

The invention relates to digital computing and can be used in automated systems and computer networks based on microcomputers with a multiplex channel of type Electronics 60M. The aim of the invention is to spread the area of application of the device. The goal is achieved in that a device containing a group of bidirectional amplifiers 1 information signals, each of which consists of two bus drivers 2, two elements NOT 11, two groups of amplifiers 8 control signals, each of which consists of receiver 10 and transmitter: 9 , trigger trigger 7 is entered. Using a device in a multiplexed microcomputer allows you to create microcomputer networks with a multiplex channel (for example, a network of several microcomputers with shared-use RAM), to increase the RAM size of the microcomputer by switching RAM units with the same addresses, to increase the reliability of the systems by microcomputer database by reserving devices of the same type, 1 slug. eaten

Description

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The invention relates to digital computing and can be used to create large automated systems and high-speed; their computer networks based on microcomputers with multiplex channel of type Electronics 60M for interfacing with peripheral devices (PU).

The purpose of the invention is to expand the field of application of the device.

The drawing shows a block diagram of the device.

The device contains a group of bidirectional amplifiers 1 information signals, each of which consists of the first and second bus drivers 2.1 and 2.2 and lines 3 and 4 are connected to the buses. Address data of the microcomputer 5 highway and 6 peripheral devices, trigger 7 control, the first and second groups of amplifiers 8,1 and 8,2 control signals, each of which consists of a transmitter 9 and receiver 10, a pulse shaper, consisting of the first and second elements NOT I.1 and 11,2, In the drawing channel lines 12, 13 and 14 microcomputers are shown in Reading, exchange and Reset lines starter 15, lines 16-19 translational control signals between the main line 5 and E 6,

Channel lines 3 and 4 are

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At the trailing edge of the signal, the exchange on line 13 is recorded at the direct output of flip-flop 7 and, as it goes, this r signal sets the direction of the exchange of amplifiers 1 and opens amplifiers 8,1 and 8,2, then PU becomes software accessible for micro computers (central microcomputer processor,

10 Upon completion of the exchange with the PU, line 15 sends a high level signal (logical unit), which, at the end of the current exchange cycle, records with the direct output of the trigger 7 and stops the operation of amplifiers 1 and 8.1 and 8.2. Switching multiplex the channel of the microcomputer to the channel of the PU occurs at the time when there is no information exchange in the microcomputer channel and the influence of

20 the minimal amount of interference occurring during switching, the switching of the multiplex channel of the rest of the computers entering the network to the control panel, is analogous to

25 At any given time, it is possible to access the control panel of only one microcomputer, Conflicts in a network consisting of several microcomputers connected to the control panel by means of

30 of the proposed devices are eliminated either programmatically (by polling the flags of each microcomputer, which are the signals at the direct outputs of the flip-flops 7 of all devices in the network), or

bidirectional. Lines 16-19 are 35 (introduction to the device is up to unidirectional (Binding of the complementary logic, processing

signals from line 15 and signals from direct outputs of all triggers 7),

If necessary, increasing, for example, the amount of RAM of the microcomputer into the multiplex channel of the latter, conventional RAM devices are included and with the help of several proposed devices; memory devices with the same trigger 7 signal of a logical unit are included, with 45 addresses not overlapping with which, arriving at the inputs of all bus addresses of conventional RAM devices (in the carriage signals of the microcomputer channel to the latter is conditional).

The device works as follows.

After turning on the microcomputer included in the network is not shown), the channel signal setting in line 14 sets the direct output

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At the trailing edge of the signal, the exchange on line 13 is recorded at the direct output of flip-flop 7 and, as it goes, this r signal sets the direction of the exchange of amplifiers 1 and opens amplifiers 8,1 and 8,2, then PU becomes software accessible for micro computers (central microcomputer processor,

10 Upon completion of the exchange with the PU, line 15 sends a high level signal (logical unit), which, at the end of the current exchange cycle, records with the direct output of the trigger 7 and stops the operation of amplifiers 1 and 8.1 and 8.2. Switching multiplex the channel of the microcomputer to the channel of the PU occurs at the time when there is no information exchange in the microcomputer channel and the influence of

20 the minimal amount of interference occurring during switching, the switching of the multiplex channel of the rest of the computers entering the network to the control panel, is analogous to

25 At any given time, it is possible to access the control panel of only one microcomputer, Conflicts in a network consisting of several microcomputers connected to the control panel by means of

30 of the proposed devices are eliminated either programmatically (by polling the flags of each microcomputer, which are the signals at the direct outputs of the flip-flops 7 of all devices in the network), or

2.1 and 2.2 and all receivers 10, prohibits the operation of amplifiers 1 and 8.1, 8.2 (the device becomes opaque for channel signals of the microcomputer) and peripheral devices, such as memory, of shared use, become soft inaccessible to the microcomputer microcomputer processor), if it is necessary to exchange with the PU, a low level signal (logical zero) is sent to line 15, which at the end of the current exchange cycle can use ROM and / or RAM with autonomous regeneration as the storage device . Access to storage devices. 5Q is led through the (window) memory area located in the address area of conventional RAM, and at any one time one device can be turned on.

The signal in line 15 is generated for each device of its own microcomputer in a network without scheduling (for example, using a poll of flags) or a special microcomputer (control

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is) in the case of a network with a dispatcher (in the latter case there are no conflicts).

Fore. Mule Invention

A device for coupling a microcomputer to a trunk of peripheral devices, containing a group of bidirectional information signal amplifiers, each of which contains two bus driver, two groups of control signal amplifiers, each of which consists of a receiver and a transmitter, two elements NOT; The inputs and outputs of the first and second bus drivers of bi-directional amplifiers of information signals of a group are the corresponding groups of input-output devices for connecting to data cables. x highways of microcomputers and peripheral devices, outputs, of the first and second elements are NOT connected respectively to the inputs of the direction of transmission of the first and second bus; the information inputs of the receivers of the control amplifiers of the first and second groups are the corresponding inputs of the device for connecting to the clock output

the bus lines of the microcomputer and the control of the bus with reset and synchronization of the address of the output busbars of the trunk line of the microcomputer, information devices, and the outputs of the plug-in trigger input is the start input

.pheny to the inputs of the same transmitter

control amplifiers of the first and second groups, the outputs of which form the corresponding groups of outputs for connection to the input control buses of the peripheral devices and the input synchronization buses of the microcomputer trunk, the information input and output of the first

the bus driver of each bi-directional amplifier of the information signals of the group are connected respectively to the output and information input of the second bus driver of the same bidirectional amplifier of information signals of the group, the input of the second element is NOT connected to the J-input of the first element NOT connected to the output bus of the mode the main line of the microcomputer, which is based on the fact that, in order to expand the field of application of the device, a control trigger has been entered into it, and the control trigger is connected to the enable inputs of the first and second bus drivers of the bi-directional amplifiers of the information signals of the group and the gate inputs of the receivers of the amplifiers of control signals of the first and second groups, the installation input and the synchronous input of the trigger are

devices.

Claims (3)

Claim A device for interfacing a microcomputer trunk with a peripheral bus, containing a group of bi-directional information signal amplifiers, each of which contains two bus drivers, two groups of control signal amplifiers, each of which consists of a receiver and a transmitter, two elements of NOT, and the inputs and outputs of the first and the second bus formers of bi-directional amplifiers of information signals, the groups are the corresponding groups of inputs and outputs of the device for connecting to the data buses microcomputers and peripheral devices, the outputs of the first and second elements are NOT connected respectively to the direction inputs ^ of the transmission of the first and second bus drivers of the bi-directional amplifiers of the group information signals, the information inputs of the receivers of the amplifiers of the control signals of the first and second groups are the corresponding inputs of the device for connecting to the synchronizing outputs microcomputer bus lines and control output bus lines of peripheral devices, and the outputs are connected to the inputs eredatchikov same amplifier control signals lane · howling and second groups, outputs of which form respective groups You are a 5 moves for connecting to the input control bus lines of peripheral devices and the input synchronizing buses of the main line of the microcomputer, information input and output of the first 10 bus driver of each bi-directional amplifier of information signals of the group are connected respectively to the output and information input of the second bus driver of the same bi-directional amplifier of information signals of the group, the input of the second element is NOT connected to the output of the first element NOT, the input of which is the input of the device for connection to the output bus of the microcomputer backbone mode, which is due to the fact that, in order to expand the scope of the device, a control trigger25 has been introduced into it, m .soedinen output control latch with the enable input of the first and second bus drivers' bidirectional amplifiers and band information signals strobiruyu- The 30 inputs of the receivers of the amplifiers of the control signals of the first and second groups, the installation input and the trigger sync input are the corresponding inputs of the device for connecting to ₃₅ reset and synchronization buses of the microcomputer trunk address, the information input of the trigger is the start input of the device.