SU1660050A1 - Device for checking data stored on a magnetic medium - Google Patents

Description

The invention relates to information control devices used in computing, in particular in devices for reproducing and recording information from magnetic recording media (NMC) to other computer devices (ACS). The purpose of the invention is to expand the functionality of these devices due to a more complete and simultaneous instrumental control of information located on different NMZ computers (ACS). For this, it is necessary to additionally use the following blocks when monitoring information: a register 2 masks, a block 9 for analyzing external devices, a block 10 for generating a subsequent address, a counter 7 for the address of external devices, a single pulse generator. 4 il.

IV 0300991

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The invention relates to computing, and in particular to devices for controlling information stored on a magnetic recording medium.

The aim of the invention is to expand the functionality of the device due to the simultaneous hardware control of information stored on the media external storage devices.

Figure 1 presents the block diagram of the device: figure 2-4 - the individual elements of the proposed device.

The device contains a register of 1 commands,. Register 2 masks, a register 3 zone numbers, a decoder of 4 commands, a decoder 5 addresses, a single pulse generator 6, an external device address counter 7, an external device analysis block 8 consisting of AND elements and an OR element, a block 9 control external devices, consisting of a storage device with an adder, an OR element and a decoder, block 10 formation of the subsequent address, which includes the OR element, the delay line for the time required for the end of transient modes in the counter 7 and deshi Rhatore 5, NOT element and the two elements' And, recording unit 11, control unit 12 and

block 13 external devices.

The device works as follows.

Counter 7 records information corresponding to the initial value of the address of external devices. After the control device of the magnetic recording medium is connected by a computer command to the common channel of the system, the following information signals will be sent to the input registers: (1) register 1 is the signal corresponding to the diagnostic command, indicating the state of the information signal stored in external storage devices ( OVC); (2) on the register 2 masks address in the memory; (3) to register 3 - the number of the zone of OVS, which is subject to control.

The signal from the output of the decoder 4 starts the generator 6, which produces a signal arriving at the second unit 10, and from its second output - at the first input of the counter 7, where it is added to the previous value, increasing it by one, which corresponds to the minimum address of the OVC. At the same time, the same signal is fed to the input of elements I. At the same time, each successive OCR number is compared. From the first output of the decoder 5, a signal is issued that the information state verification mode has been terminated at all OZU. Simultaneously, the signal from the second output of the decoder 5 is fed to the second inputs

registers 1-3 and counter 7, setting them to their original state. The readings of counter 7 are decrypted and the resulting signal is fed to the OVD selection bus, and then to the second inputs of block 8, and from the output of register 2, the first inputs of block 8 receive an information signal, where a logical check is performed to ensure that the information signals from register 2 are equal and a decoder 5. When these values coincide, a zero signal is generated at the output of block 8. The generated output signal is fed to the first input of block 10, the output of which produces a single "Start" signal that arrives at the second input of block 9. If the first input of block 10 receives a zero signal, the "Start" signal will not be formed and the signal will be transmitted to the first input of counter 7, increasing it by one. This will occur until the address of the OVC coincides with the address allowed for circulation and recorded in register 2. In this case, the Start signal will be generated, which generates a command to start the OZU at the second output of block 9. The received information is read in block 13 OVC and enters unit 12, where information is checked for the coincidence of checksums on parity, in the case of a poor-quality zone, an error signal is output to the third input of unit 11, the first input of which receives an information signal on the number of the zone from the register output 3, and the fourth input is an information signal from the output of the decoder from the OZU number.All received information signals are recorded by block 11. In addition, from the second output of block 13, the third input of block 9 receives a signal whose code corresponds to the length of the OZU zone. zone stops reading the numbers of OVC, and the control signal from the first output of block 9 is fed to the second input of block 11 and the third input of block 10.

Claims (1)

The claims of the device control information stored on the magnetic recording media containing the command register, the first input of which is connected to the input of the device, and the output to the input of the command decoder, the output of which is connected to the inputs of the generator of single pulses, the register of the zone number, the first input of which is connected to the device input, and the output with the first inputs of the external device control unit and the registration unit, the second input of which is connected to the first input of the external device control unit, five 1660050 6 information control unit, the input of which is connected to the first output of external devices, and its output - to the third input of the registration unit, the fourth input of which is connected to the first output of the decoder -! addresses of external devices, external devices, the first inputs of which are connected to the first output of the address decoder of external devices, the second output of which is connected to the second inputs of the command register, the zone number register and the device output, characterized in that simultaneous hardware control of information stored on 1 external storage media, the eye is equipped with an external device analysis unit, a subsequent address generation unit, an external device address counter trio and the mask register, 2 the first input of which is connected to the input device, the second input is with the second output of the address decoder, the output is with the first input of the external device analysis unit, the second input of which is connected to the first 5 output of the address decoder, and the output is connected to the first input of the subsequent address generation unit, the first output of which is connected to the second input of the external device control unit, the second input of the subsequent address forming unit is connected to a single pulse generator, the third input is connected to the first output of the external device control unit, and the second output is connected to the first input ika address 5 external devices, the second input of which is connected to the second output of the address decoder of external devices, and the output to the address of the address decoder, the third input of the control unit is connected to the second output 0 external devices, and the second output - to the corresponding outputs of external devices. Fig.Z. 1660050 Figs