SU1488812A1 - Computer/external device interface unit - Google Patents

Description

The invention relates to computing and can 'be used ~

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used in highly reliable computing systems and in systems of testing and control of computer devices. The aim of the invention is to expand the class of tasks of the device due to the organization of the state control mode and the replacement of failed devices in the computing system. The goal is achieved by introducing into a device containing an external device switch, an information receiving registers block and an address register, a trunk signal switch, a reference block and a control signal decoding block. 7 sludge.

The invention relates to computing and can be used in highly reliable computing systems and in systems of testing and control of computer devices.

The purpose of the invention is the extension of the class of tasks of the device due to the organization of the state control mode and the replacement of failed devices in the computing system.

Figure 1 shows the block diagram of the device; figure 2 - functional diagram of the switch external devices; FIG. 3 is a functional block diagram of information receiving registers; figure 4 is a functional diagram of the address register; figure 5 is a block diagram of the decryption of control signals; figure 6 - diagram of the signal switches of the highway; figure 7 is a functional diagram of the register lock.

The device (figure 1) contains the switch 1 external devices, block 2

registers of information reception, register 3 addresses, block 4 of decoding control signals, the reference unit 5 and the switch 6 signals of the highway. Switch 1 is made in the form of a set of K groups of trunk transceivers 7 (FIG. 2) for M in the group (where K is the number of sections — external devices to be tested 8, M is the number of devices

8 in the section), To groups of multiplexers

9 (with access to three states) in ΐ in the group (where ί is the number of signals transmitted from one device 8 to an external storage device - drive 10) and amplifiers 11. Unit 2 (FIG. 3) contains controlled main receivers 12, register 13 blocking and register 14 responses. Register 3 (figure 4) contains the register 15 and the main amplifier 16.

Block 4 (figure 5) contains the main transceivers 17, the address register 18, the address decoder 19,

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the decoder 20 control signals, the control register 21, the node 22 of the response signal delay and the node 23 of the decoding of control signals of the reference- $

no. The switch 6 consists of controlled bidirectional trunk amplifiers 24 (Fig.6).

Register 13 of the lock consists of the actual register 25 (Fig.7) and the elements OR 26. The composition of the computer system (or stand) includes a computer 27 (Fig.1) containing the line 28.

The drawings also show internal communications 29-48 of the device. )five

As a reference unit 5, various interfaces and controllers of a computer can be used, for example, devices AND 12 - two-channel interface of serial exchange, 20 И19 - four-channel serial interface, APS - device of hardware loading - diagnostics ,. KH1

A9 and others that are compatible with the trunk, Block 5 should be of the same type as 25 with checked devices 8.

As an example of the stand execution, external storage devices (OVC) 10 can be hard disk drives and back floppy disk drives.

In switch 1, the outputs 29 of the transceivers 7 are connected by lines 29 to the external connectors of all devices under test 8, including the OTD controllers, and to the outputs of the multiplexer 9 groups and to the inputs of the amplifiers 11 there are corresponding connectors of the OVC 10, the external connector of the reference unit 5 is connected by line 31. the commands coming from register 3 via line 32, turn on the specified groups of multiplexers 9 and the corresponding amplifiers 11 (commands of the type Post 1H,. '. Post 8H, ETTN). The outputs of the rest are in the third state (high impedance).

Switch 6 contains bidirectional trunk amplifiers 24, which are made as a set of bidirectional controlled cells according to the number of connected trunk lines, cells can be switched on to transfer information to one of the sides, to both sides ("transparent channel") or turned off. In the transparent channel mode, the cell transmits the information received first from either side, the cells are controlled by two signals from register 21 to the amplifiers inside the switch sections and then to the control inputs of the cells.

Register 3 receives control signals and data from register 21.

The number of register bits 15 is determined by the number of sections of the devices being tested 8. Control signal groups (Post 1H ... Post 8H, ETTN, UON ... U05N, P1H) are connected to all groups of multiplexers 9 and amplifiers 11 of switch 1 via line 32. Amplifier 16 necessary to provide a large branching ratio of the signals from the outputs of the register 15.

The device works as follows.

As part of a computing system.

Before starting work, the operator sets the reference unit 5 from the computer 27 into the device. The reference should be of the same type as the device under test 8. In fact, a modified IVK trunk interface can be used as a cross-board of an electronic unit of a device, and the corresponding ICI devices are used as standards and VU.

On power-up, they are all connected to line 28, and then the control program, pumped by the operator’s command from the OVC to computer RAM 27, switches the positions of the standards according to the selected mode of operation of the device. After turning on the power, the operator in the initial dialog sets the operating parameters (mode and time, if necessary) and runs a self-test device test, which checks the operation of the computer 27. At the initial installation, block 5 is connected to trunk 28 via block 4, and if 5 is used, for example, a controller of the KN1 type KN1, then its external connector is a signal from register 3, generated by a command from block 4 during the initial installation, through lines 31, switch 1 and line 30 is connected to the OVC 10. If you have a known good device 8 you can o check the operation of the entire device by tests of the computer 27 and device 8.,

Upon completion of the test, the test analyzes the presence of errors and their significance and issues a message to the operator.

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If errors can affect further work, then the program waits for instructions from the operator after they are eliminated, if errors are local in nature, then the test analyzes the operation parameters specified in the initial dialog and starts the maintenance program for this mode.

The maintenance program is addressed to the register address 21 of block 4 to record the command to turn off the reference block 5 and connect the first of the devices 8 instead. In this case, the address is fed to transceivers 17, 'which are pre-decrypted. Then the low-order bits of the address are entered into the address register 18 and fed to the decoder .19, from the output of which the address selection signal goes to the decoder 20, where the recording signal received from the highway 28 through the transceivers 17 generates a command to write information to the register 21.

According to the information recorded in the "Record" trunk cycle, the register 21 generates the trip signals of the reference unit 5, which arrive at node 23 and prohibit the entry of input sync signals (MBP, DCF) to the reference block 5, as well as the device selection signals 8 coming to the switch 6, register 3 and the decoder 20, from the output of which, along line 36, input synchronization signals arrive at the selected device 8 position. through transceivers 17 included in the transmission signal on line 44 from the decoder 20 is supplied in line 28. The switch 6 thus works in a bidirectional information transmission mode (on command from the unit 4 via line 35).

If the computer 27 should work with the OVC 10 of the NMD, NVMD type, then the KN1 type controllers are used as devices 8. In this case, the switch 1 by the command connects the OVC 10 to the selected device 8.

Upon completion of all switchings (1MS standby), the maintenance program transfers control to the work program. In case of failure of the device 8, the working program calls the program ob2

service, which makes the switch to the next device 8. Such a switch can be made at the end of a specified operating time (limited for a specific device 8 and OVC). Thus, round-the-clock operation of the computing system 10 can be ensured, since the blocks of the interface device itself work intensively only in the switching mode (except for the switch 6, whose sections are switched together with the device 8).

In the workout and performance testing stands, the device works as follows.

Training mode.

2о "After turning on the power and passing the self-test, run by the operator, the maintenance program, using the commands sent by it to block 4, switches the register to

25 work in one direction (from trunk 28 to the device under test: you 8) and runs test device 8 in turn. Device type 8 determines the computer 27 by sequential accessing the specified addresses of the status registers of the computer devices (each device type has its own address). After each pass of the test, the program through block 4 analyzes the contents of register 14, which contains information about the presence of response signals from each of the monitored devices 8, coming through line 40 to the input of receivers 12 and the control signals

40 produced by node 23, through lines 37 pass through receivers 12 (FIG. 3), register 13 and are entered into response register 14 on the falling edge of the output clock signal or

45 input (DChT or DZP). "1" in some kind of register 14 indicates the presence of responses from device 8 with the same sequence number during all test calls to it inside this course. If there is no response to any request in register 13, ficking ** "0" is fixed, and register 14 does not respond to the subsequent responses of device 8. Thus, yes _{5 5} is recorded as a single failure within a single pass.

At the end of the workout (the end of time Or a command from the remote)

results information is displayed

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on the computer monitor 27 and / or on the printing device included in it. Function test mode. After turning on the power and passing the self-test test, the maintenance program by means of the described actions disconnects block 5 from line 28 (for the controller of the OVD it also disconnects the OVC 10 from its external connector), turns on the section 6 of the switch 6 selected by block 4 for bidirectional operation ("transparent channel"), includes the selected device 8, by applying to its input the synchronization signals (OBM, DCT), coming from block 4, if the device 8 being checked is a TEL controller, then the program through the switch 1 connects its external connectors to TDS 10.

At the end of the switchings (pause 1 ms), the program launches alternately tests of the device under test 8 and records the results of their passage. Thus, the device 8 is checked in the computer 27. At the end of the passage of tests (or a specified operating time) the result is recorded on the monitor (printing device, OVC) of the computer 27, and the proposed device automatically proceeds to check the next specified device 8. After the end of the test All devices 8 issued the corresponding final message to the operator.

Claims (1)

Claim A device for interfacing a computer with external devices, containing a register of the address, an external device switch, the group of input-output of which is a group of input-output devices of the device for connection to a group of information inputs and outputs of external devices, and a block of information reception registers, a group of information inputs of which is a group of device inputs for connecting external devices to the output outputs, characterized in that, in order to expand the class of tasks of the device by organizing a state control mode, A trunk signal switchboard, a reference block and a control signal decoding unit are entered into it, and the information input / output of the external device switch is connected to the first information signal th input-output of the reference unit, the second information input-output of which, the input-output of the decoder control signals and the first information input-output of the commutator of the main signals are the input-output of the device for connecting to the address-information computer mainline, the second information input-output of the commutator signals of the trunk and the first output of the decryption block of control signals are the corresponding input-output and output of the device for connecting to the address-control input-output and synchronizing m inputs of external devices, the control input of the external devices switch is connected through the address register to the second output of the decryption block of control signals, the first and second information inputs, the third and fourth outputs of which are connected respectively to the output of the reference block, the output and the synchronizing input of the block of information registers and the control the input of the switch signals the highway. 1488812 1 Fie.2 '1488812 Fig.Z Phie. to 1488812 42 < ftsa.6 1488812 Fi 7