JPS5958684A - Magnetic bubble memory device - Google Patents

Abstract

PURPOSE:To discriminate whether or not the write is performed normally by comparing and discriminating a data written in a memory device and a data before write from a shift register. CONSTITUTION:A data to be written is inputted from a shift register 11 to a function drive 12 and then inputted to a generator 11 of a bubble memory device 13. The data written in the bubble memory device 13 is detected at a detector 8 or 7, amplified at a sense amplifier 14 and inputted to a comparator 15. The data before write from the shift register 11 is inputted to the comparator 15 to discriminate whether or not the write is normal. Whether or not the data is written normally is discriminated without reading out written information at the host side by discriminating the write in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a magnetic bubble memory device, and more particularly to a magnetic bubble memory device having a function of determining whether a write operation is normal or not.

(2) Prior Art and Problems In general, in magnetic bubble memory devices: - It is not determined whether the information written into the bubble memory device is normal or not. In Figure 1,
A schematic configuration of a bubble memory device is shown. In the bubble memory device shown in FIG. 1, a bubble corresponding to information is formed in a write propagation path 2 by a generator 1 and propagated.

The bubble on the propagation path 2 is exchanged with the bubble on each minor loop 4 through the swap line 3, and data is written in the minor loop 4. The data written in the minor loop 4 is replicated to the read propagation path 6 by the block replicator 5 and read out by the detector 7. In this case, it cannot be confirmed whether or not normal data has been written by the generator 1 until the data is read from the minor loop 4 by the host CPU. Therefore, inside the magnetic bubble memory device, it is impossible to confirm whether data is being written normally or not.

(, J) Object of the Invention Object of the Invention t The bubble memory device stores information'(c
- It is an object of the present invention to provide a magnetic bubble memory device that can determine whether or not information has been correctly written at the time of writing.

(4) Structure of the Invention The present invention includes means for detecting information generated in the write propagation path to the minor loop based on written information, and means for comparing the detected information and the written information. A magnetic bubble memory device is provided, in which it is determined whether a write operation in the bubble memory device is being performed normally.

(5) Embodiment of the Invention A first embodiment of the invention is shown in Box 2. The magnetic bubble memory device shown in FIG. 2 has the same configuration as the device shown in FIG. The device differs from the device shown in FIG. Therefore, in the apparatus shown in FIG. 1, by comparing the data input to the generator 1 and the data detected by the detector 8, it is possible to determine whether or not the write operation in the bubble memory device is normal. can.

A second embodiment of the invention is also shown in FIG. Third
In the device shown in the figure, unlike the device shown in FIG.
A replicator 9 is provided on the write propagation path 2 instead of 0,
The written data is duplicated by a replicator 9 and detected by a reading detector 7. In this case, since the detector 7 is also used for checking written data, there is no need to provide a new detector.

FIG. 4 shows an example of a circuit that determines whether a write operation is normal or not. In the circuit shown in FIG. 4, the data to be stored is inputted from the shift register 11 to the function driver 12, and further inputted to the generator l of the bubble memory device 13. Bubble memory device 13Kt The shredded data is sent to detector 8 or 7.
The signal is detected by the sense amplifier 14 and input to the comparator 15. The data before writing from the shift register 11 is also input to the comparator 15,
It is compared with the detected data, and it is determined whether the digging operation is normal or not.

(6) Effects of the Invention According to the present invention, when the information inputted from the host side CPU to which the magnetic bubble memory device is connected is loaded into the bubble memory device, the information is output from the bubble memory device and inputted. By comparing the information with the written information, it can be determined whether the information was written correctly or not. Therefore, on the host side, it is possible to determine whether or not the written information has been written normally without reading out the written information.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a conventional magnetic bubble memory device, FIG. 2 is a diagram showing a magnetic bubble memory device as a first embodiment of the present invention, and FIG. 3 is a diagram showing a second embodiment of the present invention. FIG. 4 is a diagram showing a magnetic bubble memory device as an example. FIG. 4 is a diagram showing a circuit for determining whether the **inclusion operation in the devices of FIGS. 2 and 3 is normal. (Explanation of symbols) 1 Nigenerator, 2: Valley propagation path, 3: Swap line, 4: Minor loop, 5: Block replicator, 6: Readout propagation path, 7.8 = Detector, 9: Replicator, 11: Shift register, 12: Function driver, 13: Bubble memory device, 14: Sense amplifier, ]5: Comparator. Patent applicant Fujitsu Limited Patent agent Akira Aoki Patent attorney Kazuyuki Nishidate Patent attorney 1) Yukio Patent attorney Akiyuki Yamaguchi Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] Means for detecting information generated in the write propagation path to the minor loop based on the fill-in information and means for comparing the detected information and the write information are provided, thereby reducing the V in the bubble memory device. = A magnetic bubble memory device characterized in that it is determined whether or not a write operation is being performed normally.