SU993242A1 - Device for interfacing magnetic tape unit with external device - Google Patents

Description

The invention relates to computing, in particular, to rewriting devices on magnetic tape of large arrays of experimental information and subsequent processing by computational means.

It is known a drive control device on a Magnetic Tape by the Binda of the System of digital 6v14x calculating machines (NML EC DVR), designed to interface the NML EC with the CVM EC channels til. . The known device has great functionality,; however, it is applicable for recruiting and checking experimental information in field conditions, regardless of the operation of the processor.

The closest in technical essence to the present invention is a device for coupling a tape drive with a digital computer, comprising a series-connected information receiving and transmitting unit whose input and output are the input and output 1 of the device, the operation register and the control unit corresponding to the inputs and outputs of which are connected to the readiness checking unit and the tape motion control unit, the second input of the readiness block and the second tape motion control unit output l are the input and output device and the fourth input control unit connected to the output of series-connected pulse generator and the time delay unit, a second outlet through which

10, a write and read control unit is connected to the inputs of the write register and the read register, the information inputs and outputs of which .1 are the inputs and outputs of the device,

15 wherein the second output of the read register through the read synchronizer is connected to the input of the write and read control unit, the second output of which is through the synchronizer,

The 20 entries are connected to the third input of the t2 register.

To extend the functionality of the device, the method of addressing the use of magnetic tape is applied, which is achieved by introducing additional units into the device for recording and recognizing the zone number.

The disadvantage of this method is 30

tape processing on the ECM of the ECM through a tape drive interface device with an external device that does not have a zone number recognition circuit. The tape marking method is not applicable in field conditions when recording experimental information in the EU standard for further processing on the EU CVM.

The purpose of the invention is to increase the speed of the device.

This goal is achieved by the fact that in a device for interfacing a magnetic tape drive with an external device, comprising a serially connected information input / output unit, a first register control unit and. the readiness control unit of the accumulator, the second input of which is the first input of the device, and the first output is connected to the second input of the control unit, the second output of which is connected to the input and the motion control unit. magnetic tape, the first output of which is the first output of the device, and the second output is connected to the third input of the control unit, the second and third registers are connected in series with the pulse generator and the delay unit, the first output of which is connected to the fourth input of the control unit, the second output A delay block is connected to the first input of the recording and reading control unit, the first output of which is connected to the first input of the second register, the second input and output of which are the second input and the second output, respectively. the third register is connected to the output of the first synchronization unit, the input of which is connected to the second output of the write control and reading control unit; the third input is connected to the first input of the third register, the second input is the third input of the device, and the first the output is the third output of the device, the second synchronization unit, the first input of which is connected to the second output of the third register, the first output to the second input of the control unit, writing and reading, the second output to the first input of the input unit and and output, the second input of which is chetvertymvhodom device and the second output -. the fourth output of the device / entered the decoder, the first and second counters, the first and second coyuchi, pulse shaper, the first and second comparators, the first input of the decoder is connected to the third output of the delay unit, the second input - to the third output of the third register, and the first input the first counter, the second input of which is connected to

the second output of the first register, the third output of which is connected to the first input of the second counter, the second input of which is connected to the fourth output of the write and read control unit, and the output to the first input of the first comparator, the second input of which is connected to the output of the first key, and the output is connected to the first input of the pulse generator, the second input of which is connected to the output of the second comparator, the first and second inputs of which are connected respectively to the output of the second key and the output of the first counter; the third input is formed The pulses are connected to the third output of the control unit, the fourth output of which is connected to the input of the pulse generator, the output of the pulse shaper is connected to the second input of the first register, and the fifth output of the write and read control unit is connected to the third input of the information input / output unit.

FIG. Figure 1 shows a block diagram of a device for coupling a tape drive with an external device; in fig. 2 - an example of the implementation of the pulse former.

The device contains sequentially included information input / output unit 1, operation register 2, control unit 3, storage device readiness control unit 4, tape motion control unit, pulse generator 6, delay unit 7, recording synchronization unit 8, recording control unit 9 and read, write register 10, read register 11, read synchronization block 12, decryptor 13 of the zone group marker, zone group counter 14, zone group number code comparator 15, pulse shaper 16, zone counter 17, zone number comparator 18, key 19 number groups of zones, key zone numbers 20, first flip-flop 21, the first AND gate 22, the control elements 23 / second flip-flop 24, second AND gate 25, driver 26 commands.

In this device, the impulseformer 16 is a manual control unit that performs the following functions: manual selection of control commands (recording a zone group marker, erasing gaps, rewinding and unloading, step forward by group of zones, backward zone by group of zones, step zone forward, step back zone) and the automatic search for a zone or group of ZON. One of the possible implementations of this block is shown in FIG. 2

The function of the keys 19 and 20 is to set the number

required information array (Zone or Group -zone). One of the possible implementations of elements 19 and 20 may be the use of code switches, at the outputs of which the number of the desired zone or group of zones is represented as a binary code.

The device works as follows.

The features of the command, which are set by the external device through the information input / output block 1 or block 16, are recorded in the register 2 of operations for the duration of its execution. The write and read commands are associated with the exchange of information between the external device and the NML. The mode of operation of the device at the time of starting and stopping the tape at the time of erasing the gap, as well as for measuring gaps between the lines on the tape, is determined by the control unit 3. After entering the attributes of the command in the operation register 2, unit 4 evaluates the state of the NML, the control of which is performed by the tape motion control unit 5. For the coordination of all units of the device, block 7 is designed, which generates the necessary temporary delays at all stages of operations. Shift signals for block control

7 Generates pulse generator b. The operation of the device in writing, reading or checking data reads is determined by the writing and reading control unit 9. When writing and reading, the exchange of information between the external device and the NML is carried out through the write register 10 and the read register 11. Synchronization of the device when writing bytes of information on the tape performs block

8 sync. Records. In read and check read operations, the read synchronization unit 12 is triggered by the first read from tape tape. When executing the commands Step to zone forward and Step and zone back, the zones are identified by check lines. The recognition pattern of the control lines is located in the write and read control block 9. To move a tape to a zone group forwards or backwards, a zone group is determined by the zone group marker, which is recognized in the decoder 13 of the zone group marker, where the bit structure of each byte from the tape is checked. In a zone or group of zone search operations, the control commands Step forward, Step backward, Step forward forward group, and Step backward group management are used. These commands in block 16 define the search direction and the type of information array

zone or group of zones). The number of the desired zone or group of the RLL is the sequence number of the desired array and is specified by the zone group key 19 and the zone number key 20. The count of the number of read zones or a group is maintained by revolving counters of 14 groups.

zones and 17 zones. After reading each zone or group of zones, the number specified by the key 19 of the number of the zone group or by the key 20 of the zone number is compared respectively in a comparator 15 codes.

zone group numbers or comparator 18 zone number codes with the number of zones read or groups of zones. The mismatch of the master code when searching for a zone or group of zones with a code that corresponds to & the counter indicates that the read zone or group of zones is not the one you are looking for, and the comparator generates an enable signal for the formation of the cmmanda selected at the beginning of the search. To rebuild the command, an end-impulse signal is generated by the control unit 3 after the completion of any command. The command, newly formed in block 16, is entered into the register of 2 operations, and the search operation continues. When finding the desired zone or group of zones, the corresponding comparator prohibits the re-formation of the command and the search operation is terminated.

The proposed device records experimental information on a magnetic tape independently of the processor, which allows information to be accumulated in field conditions without a communication channel with the computer center. Information is recorded on a magnetic tape in strict compliance with EU standards.

the presence of auxiliary service information zones, which makes it possible to process the recorded information of any EU CVM. Thus, the introduction of new blocks and links allows

exclude auxiliary address zones, which improves the performance of computing facilities. In addition, a magnetic tape is more rationally used.

Claims (2)

1. Documentation system of the EU computer. : Ed. A.N. Larionov. M ,, Statistics, with. 27, 1975. five 2. USSR author's certificate No. 608152, cl. aOb Gg 3/06, 1975 (prototype). t6 pp 23 or pffu & rijpamtyxt o / reflaet4t 0 / n ftoff / rff / ac / nff / a / L O / nSaoMi3 ffoffae f / ff ff / fOf y1 / mxL / a L19 O / n MfffffW / oarr o / xr # / coLx f fff / south g / / g / hl / sf 0tff. 2 2S