SU777655A1 - Interface - Google Patents

Description

the parallel code to serial converter and the first input of the serial to parallel converter, the second input of which is connected to the first output of the clock generator connected by two-way communication with the bit counter and the first input of the parallel code to serial converter, the second input and output of which are connected respectively to the first output of the accumulator and the input of the sync pulse generator, the second input of which is connected to the first output of the control unit and the first input The accumulator and communication unit with the machine, connected to the first and second outputs respectively with the first and second inputs of the control unit, the second input and output respectively with the second output and input of the accumulator, and the input-outputs with the corresponding machine inputs-outputs of the device, entered the code register query, a coder of official words and a polling unit. The first inputs and outputs of the control unit are connected respectively to the first and second inputs of the query code register, the output of which is connected to the third input of the parallel code to serial converter and the first stop input of the polling unit, the control input, the start input and the second stop input of which are respectively connected to the first , the second and third outputs of the control unit. The first output of the control unit is connected to the input of the service word encoder, connected to the fourth input of the parallel code to serial converter, and the first input of the decryption unit, the second and third inputs of which are connected respectively to the output of the serial code to parallel converter and the output of the polling unit. The output of the decryption unit is connected to the third input of the control unit. In addition, the polling unit contains a group of OR elements whose outputs are the output of the subscriber's coder, the outputs of which are connected to the corresponding inputs of the OR group elements, the subscriber address decoder and the register, the outputs of which are connected to the corresponding inputs of the subscriber address coder, connected by the output and the INPUT, respectively, with the register input and the mask register output, the input of which is the control input of the block, the subscriber counter, the output and input of which are connected respectively but with the input of the address address decoder and the output of the synchronization node, the first and second inputs of which are the corresponding block stop inputs, the third input is the block start input, and the fourth input is connected to a pulse generator.

Pa figs. 1 shows the structural scheme of a multi-machine system and the US scheme; on

FIG. 2 - a functional block diagram of the survey.

The system contains US 1, connected by machine inputs-outputs 2 and 3 to the corresponding digital computers, and inputs-outputs 4 and 5 to the communication lines 6 and 7.

US 1 includes a communication unit 8 with a machine, a control unit 9, an encoder 10 words, a request code register AND, a clock generator 12, a decryption unit 13, a polling unit 14, a counter 15 bits, a drive 16, a parallel code converter 17 serial , serial code converter 18

5 parallel and translation unit 19.

The polling block (Fig. 2) contains a mask decoder 20, a register 21, a subscriber counter 22, a subscriber address decoder 23, a subscriber address encoder 24 consisting of

0 from the group of encoders 25, the elements of OR 26 groups, the generator 27 imiulsov, the synchronization node 28, the mask register 29, the control input 30, the stop inputs 31, the block start input 32 and the block output 33.

5 CSS works as follows.

The exchange CMV exposes through the block 8 the service word "Request to the register I.” The format of the service word contains the addresses assigned

Q DVR and CSS 1 of the requestor and the respondent, the command code and the sign of the service word.

In any one of CSS 1, block 14 is included, which cyclically sends the service words “Interrogation, carried out sequential polling of registers 11, beginning with the first CSS, by successively changing the addresses of subscribers in these service words. At the same time, each set (DV and CD) is pre-assigned an address using the switches of block 13, which analyzes the addresses and service words.

When polling the register and the CSS, the word "Request to the communication line 6, 7 is read through the converter 17 and block 19. The CD, the responder, to which the" Request receives the Request through block 19 and the converter 18, analyzes the feature " words, code, command and address and, in the case of the “Request to this kit”, translates it through blocks 9 and 8 to a digital computer in the form of an interrupt signal. Simultaneously read "The request stops the block 14.

After receiving the "Request for the DVR-responder in case of unavailability for the exchange, it issues to the address of the requestor's digital computer the service word" This, which is similar to other service words on the Q lines, and then enters the CVM interrogator.

Then, the requestor's digital computer issues the start word to start block 14.

If the DVR is defendant ready for the exchange.

then, having received the "Request, it issues the service word" Answer to the address of the requestor digital computer, which is transmitted, processed as other service words, and is sent to the requestor digital computer as an interrupt signal.

After receiving the "Answer, the exchange between the pair of specified digital computers is considered to be established, and the digital computer - the requestor issues to the digital computer - the defendant an array of control words. The remaining digital computers of the complex do not exchange information at this time.

The array of control words is transmitted to the communication line 7 via the information channel US - interrogator: input 2, block 8, block 9, accumulator 16, converter 17, block 19. In this part of the words of this array is used to set up block 9, fixing in it the amount of information transmitted in the array of control words, the number of transmitted parts (macros) in the information array, and the amount of information transmitted in the last incomplete macros. For this purpose, block 9 contains, in particular, a set register, a word word count in a microsword, which performs the function of an address generator for the accumulator, and a microsword counter. Block 9, after recording information into the settings register, into the word count counter and writing the array of control words to the accumulator, generates a signal from the overflow pulse of the word count counter in the digital circuit: block 8, output 3 to stop the exchange, and arrange for the output of this array line 7 through drive 16, converter 17, and block 19.

When issuing information and data words, a generator 12 and a counter 15 are used, which counts the information bits in the word.

From the communication line 7, the array of control words enters the digital computer - the defendant via the information channel US - the responder: block 19, converter 18, block 9, drive 16, block 8, output 3. This is similar to the above described setting up block 9 and forming a signal for resuming the exchange with the digital computer by depi: blocks 9, 8 and output 3. - Similarly, the exchange of an array of control words exchanges the macros of the information array. At the same time, an increase in the exchange rate is achieved by simultaneously recording one macro word from the CVM transmitter into the storage .16 of the US transmitter and reading it into the CVM receiver of another macro word from the storage 16 of the USB receiver. For example, the DVR transmitter issues the first macro word to the drive of the US transmitter. When the accumulator is full, the DVR transmitter interrupts the exchange. Then the first "macro" is pumped to the drive of the US receiver. After filling in the CD storage receiver

and "cleaning the accumulator of the US transmitter on signals from blocks 9 of this CD, the second macrosword is recorded into the accumulator of the US transmitter and reading the first macrosword from the accumulator of the US receiver. When the second macro-word is recorded, the control unit of the US transmitter generates a readiness signal for issuing the second macro-word to the responder. After reading the first

The macro-USC receiver, using the control unit and the encoder 10, forms and issues a service word, "receipts." to the US transmitter. If the arrival of this service word and the readiness signal for issuing the second macro-word match, the US transmitter unit 9 organizes the delivery of the second macro word to the US receiver.

Exchange with such a construction of a communication system is possible as separate words,

any given number of macros.

The formation of test bits, control modulo 2 and the checksum is possible on the digital computer of the complex, while

in the system, words with test bits are translated without change. In the case of distortions, the DVR receiver forms and issues the service word "Marriage, and the exchange session is repeated. After the end of the exchange session, the DVR-receiver issues the service word "End of exchange, and then the service word" Zusk, on which block 14 is started. The Relsim of the software restructuring of the computing complex from centralized to decentralized and reverse is performed using the service word. "A mask that can be issued in block 14 of any of the digital computers of the complex. Wherein

Block 14, after issuing a signal in the communication line "Initial or after the end of the next exchange session and issuing the command word to the CMV receiver," The end of the exchange of digital computers (any given program) generates and issues to the block 14 the service word "Mask with a set address ( DC) which should not be polled.

The address part of the specified word ebnoho words on the input 30 enters the register 29,

is decoded by decoder 20, and the signal from

the output of this decoder is remembered

on the trigger register 21, block the input

the corresponding encoder 25.

The addresses of the sets specified in the following; the final word "Poll is formed and cyclically issued using generator 27, node 28, counter 22, decoder 23, encoder 24, and OR 26 elements. In the case that" all The DVR to which the unmasked address is assigned becomes central (it is assigned the highest priority). Possible centralization (assignment of "higher priority) of the group of digital computers

with respect to the other group, the path of the beaconing of a part of the addresses (CVM) with the equal priority discipline of service in the order of questioning within these groups.

Thus, the device allows to interface the group of digital computers in a single computing system, and the absence of the need for software exchange control allows an increase in the capacity of the device and the efficiency of the use of digital computers.

Claims (2)

1. USSR author's certificate for application number 2444398, cl. G 06F 3/04, 1977. 2. US patent number 3648256, cl. 235-132, 1972 (prototype). FIG. t