SU1156082A1 - Interface for linking computer with magnetic medium stores - Google Patents

Abstract

A DEVICE FOR PAIRING ELECTRON-COMPUTING MACHINE WITH DRIVES ON MAGNETIC MEDIA, containing a mode setting unit, a control unit, an interrupt unit consisting of two triggers, three elements AND, two elements OR, a group of elements AND, and a group of information outputs of a task controller, and three groups of information elements, or OR, a group of elements AND, and a group of information outputs of a task controller, and three groups of information elements, OR with the first inputs of elements AND of the group, the outputs of which are connected to the first group of inputs of the control unit, the access input of which is connected to the output of the first OR element of the interrupt unit, the first input of which is connected It is connected with the output of the first element AND interrupt unit, the first input of which is connected to the single output of the first trigger of the interruption unit, the zero output of which is connected to the first input of the second element AND whose output is connected to the first input of the second element MLN of the interrupt unit whose second input is connected with the output of the third element And, the first input of which is connected to the second input of the second element And and with the output of the second trigger, characterized in that in order to increase the reliability of the device by eliminating failures x situations in the mode of joint operation of the operator and the electronic computer, the call counter, the command storage unit are entered, and the third trigger is four elements AND, the prohibition node in the interrupt block, and the group of information inputs of the command storage block forms the device's input of the same name, the first input the prohibition node is the device access input, the group of outputs of the command storage unit is connected to the second group of inputs of the control unit, the output of the operation end of which is connected to the first inputs of the fourth and fifth elements And the output of the fifth element AND is connected to the zero setting input of the third trigger, a single output which is connected to the second inputs of the elements AND group :, the fifth element AND, the first element OR, and the zero setting input of the second trigger, the single installation input of which is connected with the output of the sixth element I, the first input of which is connected to the output of the circulation of the mode setting block, the second input of the sixth element II. is connected to the second inputs of the first and fourth elements and m with the null output of the third trigger, unit vn ustaiovochnp input coupled

Description

with the output of the second element OR, the first input of the first element AND is connected to the third input of the fourth element. And, the output of which is connected to the second input of the third element AND and the subtraction input of the reference counter, the group of outputs of which is connected to the group of address inputs of the command storage unit and to the group of inputs of the seventh element AND,

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the output of which is connected to the zero setup input of the first trigger, the one-time setup input of which is connected to the counting input of the hit counter, the write input of the command storage unit and the output of the prohibition node, the second input of which is connected to the read input of the store. command and with the release of the first element I.

. . ; , 1 The invention relates to automation and computer technology and can, in particular, be used in devices for controlling the operation of magnetic storage devices. Devices for interfacing computers with external accumulators on magnetic tapes CO and disks C2j are known, containing, respectively, control, reception, setting modes and control instructions for microinstructions, arithmetic and logic, interface, engineering console, power supply system remote control. The disadvantages of these devices include the inability, in the intervals between EH calls, to set, if necessary, auto-purge modes for the operator to work with one of the free external drives when the computer is running. In this mode, interference occurs due to the asynchronous operation of the computer and the operator, which reduces the reliability of both the control unit and the computer and their collaboration. The closest to the proposed technical entity is a device for interfacing a computer with external drives, containing blocks for setting modes, control and interruption, the first and second groups of elements AND, which, with appropriate communication between them, provide the possibility of implementing the combined mode operation of the computer and the SZ operator 1. The known device did not ensure the elimination of the likelihood of the occurrence of faulty situations in the link Operator-interface device — accumulate when the computer is accessed Currently komandyOperatora processing devices, the reliability and reduces the authentic information processing ustroytvo interface. The purpose of the invention is to increase the reliability of the device operation by eliminating the likelihood of faulty situations in the mode of the combined work of the operator and the computer. This goal is achieved by the fact that a device for interfacing an electronic computer with magnetic storage devices containing a task setting unit, an elastic unit, an interrupt unit consisting of two triggers, three AND elements, two OR elements, and the group of elements AND, the group of information outputs of the mode setting block. is connected to the first inputs 3JieMeHTOB AND the groups, the outputs of which are connected to the first group, the input of the control black, the input of which is connected to the output of the first element OR the first input of which is connected to the output of the first element And interrupt unit, the first input of which is connected to the unit output of the first trigger of the interrupt unit, the zero output of which is connected to the first input of the second element AND whose output is connected to the first input of the second element OR interrupt unit, the second the input of which is connected to the output of the third element And, the first input of which is connected to the second input of the second element And and to the output of the second trigger, a call counter, a command storage unit are entered, and in the interrupt block - thirds trigger, four elements And, a node per ret, and the group of information inputs of the command storage unit forms the device input of the same name, the first input of the inhibit node is. Inverting device 4, the group of outputs of the command storage unit is connected to the second group of inputs of the control unit whose output of the end of operation is connected to the first inputs of the fourth and fifth, And elements, the output of the fifth And element is connected to the zero set input of the third trigger, and the output of which is connected to the inputs of the AND elements of the group, the fifth AND element, the first OR element, and the zero trigger input of the second trigger, the single installation input of which is connected to the output of the sixth AND element, the first input the second input of the sixth element I is connected to the second inputs of the first and fourth elements I and the zero output of the third trigger, the single installation input of which is connected to the output of the second IL element the first input of the first element I connected to the third input of the fourth element And, the output of which is connected to the second input of the third element And and the subtraction input of the reference counter, the group of outputs of which is connected to the group of address inputs of the command storage unit and to the group The inputs of the seventh And element, the output of which is connected to the zero setting input of the first trigger, the single installation input of which is connected to the counting input of the counter of amplification, the recording input of the command storage unit and the output of the block node, the second input of which is connected to the reading input of the storage unit commands and with the release of the first element And. I Figure 1 shows the functional scheme of the device; Fig. 2 is a block diagram of a control unit; FIG. 3 is a block diagram of a command register; FIG. 4 is a functional diagram of a memory element; on fig.Z - scheme of the site ban. The device contains (Fig. 1) block 1 of the task p (clamp, AND elements of 2 groups, control block 3, first element OR 4, second trigger 5, first trigger 6, second element And 7, third element And 8, first element And 9 , the second element OR 10, the access counter 11, the instruction storage unit 12, the sixth element AND 13, the seventh element AND 14, the fourth element AND 15, the fifth element AND 16, the third trigger 17, the prohibition node 18, the device access input 19, information input device 20. The control unit 3 contains (FIG. 2) the elements of the OR 21 group, the register 22, the decoder 23, the driver 24 signals control accumulators, delay element 25 ,, element OR 26. Command storage unit 12 contains (FIG. 3) elements HE 27 and 28, decoder 29, AND element 30 and 31, accumulator 32, group memory element 33, elements OR 34 The memory element 33 contains (FIG. 4) an HE element 35, And elements 36 and 37, a trigger 38, an AND element 39. The prohibition node 18 contains (FIG. 5) an HE element 40, an And element 41. The device works as follows in a way. When the device is turned on, all the elements of the memory are reset, in the counter 11 accesses on all bit outputs the unit levels are set. In the initial state, the third trigger 17 permits the passage of the operator's signal from the input of the mode setting unit 1 through the sixth And 13 element. This signal, passed through the And 13 element, switches the second trigger 5. In the initial state, the first trigger 6 is set from the outputs 11 computer accesses through the seventh element AND 14 in such a way that it allows the operator to pass from the output of the second trigger 5 through the elements AND 7 and OR 10 to the single installation input of the third trigger 17. From the single output of the installed trigger 17 reversal ue operator enters via the first OR gate 4 to the input of the control unit 3 of handling. At the same time, this signal resets

five

the second trigger 5 and enters the second inputs of the group of elements I 2, thereby allowing the operator to pass the command from the output of the mode setting unit 1 to the first group of inputs of the control unit 3. The latter begins to execute an operator command. From the trigger output of the trigger 17, a signal is removed, locking the sixth element I 13 and thereby preventing the re-installation of the trigger 5 by the same operator.

If a request from a computer arrives at the time when the control unit 3 executes the command, it passes through the prohibition node 18, since the first element 9 is closed with a signal from the zero output of the trigger 17 and there is no signal at its output that the access from the computer passes through the prohibition node 18 . From the output of the prohibition node 18, the access signal is fed to the counter t1 of calls, increasing its content by one, and to the unit installation input of the first trigger 6. At the same time, this signal serves as a resolution for recording in block 12 corresponding to this one converted by a computer command. The command is recorded at the address determined by the current code value at the outputs of the counter AND calls. Similarly, the sample is processed by computer inversion until the control unit 3 executes the operator's command.

After completion of the operator's command, the control unit 3 generates a signal. End of work that passes through an open 17th fifth element AND 16 and opens the trigger with a single output. The AND 9 element now receives a zero exit of the trigger and passes the ESH through zero output of the trigger. Elements 9 and ШШ 4 at the entrance of the block access: 3 controls. At the same time, this signal prohibits the computer from going through the prohibition node 18 and permits it from block 12 to computer control unit 3 stored in the command register at the address corresponding to the current code at the output of counter 11. It is obvious, that the command of the computer is sent to the input of the control unit 3 first

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which was last recorded in block 12. Thus, the control block 3 starts executing a computer command.

5 If at this moment the operator’s call comes from the output of the mode setting unit 1, it passes through the open resolution from the zero output of the trigger 17, the sixth evil element 13, and sets the second trigger 5. After the computer command completes, the control unit 3 generates a signal End of operation, which runs through open

15 by the second and third input resolutions, respectively, from the zero output of the trigger 17 and the single output of the trigger 6 is the fourth element AND 15, through the open resolution from the output of the trigger 5 the third element AND 8, through the element OR 10 and sets the trigger 17. At the same time this signal, pass to the input of the subtraction of the counter 11 calls, reduces its content and, accordingly, the code at its output by one. From a single output of the set trigger 17, the operator accesses through the OR 4 element at the input of the control unit 3 and simultaneously enters the second inputs of the AND 2 group of elements, which allows the operator’s command to exit the mode setting unit 1 through the AND 2 element group

J on the first group of inputs of the control unit 3. Thus, control unit 3 begins executing an operator command.

If during execution by block

 The 3 computer control commands from the mode setting unit 1 are not accessed by the operator, then the trigger 5 remains in the reset state. Signal The end of the work, produced by the control block 3 after it executes the computer command, passes through the open permits with the second and third inputs, respectively the zero output of the trigger 17 and the single output of the trigger 6, the element 15 to the subtraction input of the counter 11 calls and reduces by one the number of the references of the computer stored in it. But this signal does not pass through

5 closed by a ban from the output of the reset trigger 5 element And 8, i.e. the trigger 17 does not establish that the access signal from the computer to the control unit through the element 9 is not prohibited. Therefore, the control unit 3 is given the reference signal and the computer command stored in unit 12 at the address corresponding to the current code on the counter output 11 hits. If there are no further operator calls, the unit 3 controls the successive ES commands until the counter 11 calls returns to its original state. This means that all the applications of the computer are fulfilled. Then, at the output of the seventh element And 1A, a signal appears that resets trigger b, thereby removing the call signal from the input of control unit 3, and the interface device returns to its initial state. At the beginning of the consideration of the device operation, it was assumed that the operator received the first appeal. If the computer accesses the device first, it passes through the prohibition node 18, since element 9 is closed by a signal from the single output of trigger 6 and there is permission for its output node t8 ban. The signal from the computer from the output of the prohibition node 18 goes to the counting input of the counter 11 of calls and increases its content by one. At the same time, the signal sets trigger 6 and permits the recording of the EY1 command in block 12. Signal c. of the single output of the set trigger 6 passes through the open resolution from the zero output of the reset trigger 17 element AND 9 and through the OR 4 element to the input of the control unit. At the same time, the signal from the output of the AND element 9 closes the prohibition node 18 and enables, in block 3, the command of the ES command from block 12, stored at the address corresponding to the code on the counter of the 11 accesses. Further 1-step operation of the device sign is similar to those described. The control unit 3 (Fig. 2) is intended to generate signals for controlling the operation of storage devices on magnetic media by commands of a computer or an operator, taking into account the state of storage devices. The group of elements of the IP 21 is intended for switching the operator command codes 0828 and the computer coming from (direct to its first and second outputs, to the first inputs of the register, the first inputs of the group of elements OR 21 are the first group of inputs of the control unit 3 and the second inputs are the second group the inputs of the block 3. The register 22 is designed to receive and store the codes of the commands arriving at its first inputs. The code is recorded when the signal is received The second input of the register 22 is addressed. The input is the control input of the control unit 3 The output of the work that sets it to its initial state is fed to the reset input of register 22. The outputs of register 22 are connected to the inputs of the decoder 23 and the first inputs of the accumulator control signals 24. The set of commands executed by the interface device can be divided into There are two types: The first type is commands that are executed by the device for pairing without the drives, the second command, for which you need to work out certain actions on the part of the drives. The decoder 23 is designed to decrypt the command code of the first type. From the output of the decoder 23, the command intercepts the second inputs of the imaging unit 24 and the input of the delay element 25. Shaper 24 of drive control signals is designed to convert second type instruction codes into drive control signals, taking into account the state of shaper 24 itself, the internal state of which is determined by first and second type commands, respectively, entering its second and first inputs. . Information about the state of the accumulators is supplied to the third inputs of the imaging unit 24 by LINI.CM communication interface for the device for interfacing with the accumulators. By the same interface, control signals from the outputs of the imaging unit 24 are fed to the accumulators. When executing commands of the first kind, these commands are used as the End Work signal; dy input to the input element 23 of the delay from the outputs of the decoder 23. The delay time is chosen so that the command arrives at the second input of the element OR 26 only before it is worked out by the driver 24. When executing the commands of the second type, the End of Work signal is generated by the accumulator participating in the execution of the command and goes to the first input of OR 26 through the line of the communication interface. Element ШШ 26 is designed for switching signals. End of work, arriving at its first and second inputs, at the output of control unit 3 and at the reset input of register 22. The control unit operates in the following way. An operator or computer command code enters through the group of elements OR 21 at the inputs of register 22 and is stored in it by the Appeal signal. If a command code of the first type is received, it is decrypted and the command from the output of the decoder 23 is sent to the driver 24 to drive accumulators. The same command goes through the delay element 25 and the IP element 26 to the output of the control unit as a signal. End of operation and input reset register 22, returning it to its original state. If a command code of the second kind is specified, it is received from register 2 in shaper 24, modified there and transmitted via communication interface lines to the appropriate drive. The drive processes the command and provides information about the completion of the work through the communication interface lines. The end of work signal comes from the interface through the OR element 26 to the output of the control unit and to the reset input of the register 22. The block 12 (FIG. 3) is a random access memory and is intended for recording, storing and transmitting computer commands. the second input of the element I 30 when the signal arrives at the input of reading block 12. This allows removing the sync signal from the output of the element 30 when receiving 82 .10 a signal to the input of reading block 12. The sync signal recording appears at the output of the element 30 when cash and a signal at the input of the reading unit 12. The element 28 is not designed to block the second input of the element i 31 when a signal arrives at the input of the recording of the block 12. the sync signal read appears at the output of the ninth element i 31 when there is a signal at the input of the reading of the block 12 and in the absence of a signal at the input Record unit 12. The decoder 29 is designed to sample the address bus accumulator 32, the address code of which is fed to the address input unit 12. The drive 32 is designed to store computer commands. It consists of “strings of memory elements 33. Each line contains 33 memory elements. Each memory element 33 is designed to memorize one bit of an M-bit computer command. The string of memory elements 33 memorizes the computer command completely, i.e. drive 32 is designed for storage of FM-computer discharge commands. The Mk-bit elements OR 34 are intended for the bit-wise assembly of the outputs of the corresponding memory elements 33. Command register works in the following way. According to the address code at its inputs, the decoder 29 selects the address bus of the corresponding row of accumulator 32. If there is an input at the input of the register of the permit commands and no permission is entered which is at that moment in the command register entry. To read a computer command, it is necessary to submit the corresponding address code to the address inputs of the command register. At the same time, the address line of the required line is selected and an enable signal is given to the input of the read command register. In the absence of permission at the entrance of the recording of the register of commands, the tire is selected.

l 32 and the outputs of the elements 33

the memory of the selected row appears

code of the required computer command. This

the code is switched by elements OR 34

from the outputs of the 33 memory elements to

corresponding register outputs

teams.

The memory element 33 is for storing one instruction code bit. The functional diagram of the element 33 is presented in figure 4.

The HE element 35 is designed to block the AND 37 element at the third input when writing to the element 33: logical memory 1. And the 36 element is designed to generate a signal ycrarfoBKa to the trigger input 38 nptt signals on the tires Address Record and Log.1 level on the input .

Element And 37 is designed for signal output Reset to the corresponding input of the trigger 38 in the presence of signals on the bus Address, Record and Log.O level on the bus Input.

The trigger 38 is designed to memorize the level of a logical signal on the bus. Input when there is resolution on the Address and Write systems.

Element I 39 is designed to co-mutate the logic level from the output of trigger 38 to the input of memory element 3 in the presence of resolution on the Address and Read buses.

The memory element works as follows.

If there is resolution on the Address and Write buses, the output of the trigger 38 is set to a logic level corresponding to the bus level on the Input of the memory element 33.

If there is resolution on the Address and Read buses, the Output of the memory element 33 establishes a logic level corresponding to the logic level at the output of the trigger 38.

Using the combined mode of operation of the operator and computer. by ensuring that the probability of occurrence of faulty situations is eliminated, the reliability of operation of the device and the reliability of information processing in general increases.

Introducing the elements of the temporary isolation of operator and computer calls into the device (reference counter, command register, trigger, four AND elements and one prohibition node), significant new connections between them and the existing elements allows increasing the reliability of the device.

In addition to eliminating faulty situations during simultaneous accesses of the computer and the operator, the use of the device ensures alternate resetting and processing the incoming applications of the computer and the operator, increasing the processing speed of the information processing by the device when working with several storage devices by memorizing the computer and moving to the subsequent free drive does not wait until the first drive with which, for example, the operator works, is released.

Thus, it eliminates the need for useful computer time in preparing the GG storage device for operation, performance monitoring, and troubleshooting.

Hod konand1 1 Ykandy operator MM

31

-

guv

Reading Address

Record

L -

J7

Output

39

t

Fy

FIG. five

Claims (1)

A device for interfacing an electronic computer with storage devices on magnetic carriers, comprising a mode setting unit, a control unit, an interrupt unit consisting of two triggers, three AND elements, two OR elements, a group of AND elements, and the group of information outputs of the mode setting unit is connected to the first inputs of AND elements of the group, the outputs of which are connected to the first group of inputs of the control unit, the access input of which is connected to the output of the first OR element of the interrupt unit, the first input of which is connected to the output the ode of the first AND element of the interrupt block, the first input of which is connected to the single output of the first trigger of the interrupt block, the zero output of which is connected to the first input of the second AND element, whose output is connected to the first input of the second OR element of the interrupt block, the second input of which is connected to the output of the third element And, the first input of which is connected to the second input of the second element And and the output of the second trigger, characterized in that in order to increase the reliability of the device by eliminating malfunctioning situations in p bench teamwork and operator of a computer, reference count entered, teams storage unit. and to the interrupt block - the third trigger, four AND elements, a ban node, and the group of information inputs of the command storage block forms the device input of the same name, the first input of the ban node is ^ the device access input, the group of outputs of the command storage block is connected to the second group of inputs of the control unit, the output of the end of which is connected to the first inputs of the fourth and fifth elements AND, the output of the fifth element And is connected to the zero installation input of the third trigger, the single output of which is connected to the second inputs elements of the AND group, fifth element AND, the first OR element and with zero installation input of the second trigger, the single installation input of which is connected to the output of the sixth element And, the first input of which is connected to the output of the control unit mode, the second input of the sixth element And is connected to the second inputs the first and fourth elements of AND and with a zero output of the third trigger, a single installation input of which is connected to the output of the second element OR, the first input of the first element And is connected to the third input of the fourth element a. And, the output of which is connected to the second input of the third element And and the input of the subtraction of the access counter, the group of outputs of which is connected to the group of address inputs of the command storage unit and to the group of inputs of the seventh element And, the output of which is connected to the zero installation input of the first trigger, the single installation input of which connected to the counting input of the access counter, the recording input of the command storage unit and with the output of the prohibition node, the second input of which is connected to the reading input of the command storage unit and with the output of the first element I.